1ec8f24b7SThomas Gleixner# SPDX-License-Identifier: GPL-2.0-only 21da177e4SLinus Torvalds# 31da177e4SLinus Torvalds# IP configuration 41da177e4SLinus Torvalds# 51da177e4SLinus Torvaldsconfig IP_MULTICAST 61da177e4SLinus Torvalds bool "IP: multicasting" 71da177e4SLinus Torvalds help 81da177e4SLinus Torvalds This is code for addressing several networked computers at once, 91da177e4SLinus Torvalds enlarging your kernel by about 2 KB. You need multicasting if you 101da177e4SLinus Torvalds intend to participate in the MBONE, a high bandwidth network on top 111da177e4SLinus Torvalds of the Internet which carries audio and video broadcasts. More 121da177e4SLinus Torvalds information about the MBONE is on the WWW at 134960c2c6SJean Sacren <http://www.savetz.com/mbone/>. For most people, it's safe to say N. 141da177e4SLinus Torvalds 151da177e4SLinus Torvaldsconfig IP_ADVANCED_ROUTER 161da177e4SLinus Torvalds bool "IP: advanced router" 171da177e4SLinus Torvalds ---help--- 181da177e4SLinus Torvalds If you intend to run your Linux box mostly as a router, i.e. as a 191da177e4SLinus Torvalds computer that forwards and redistributes network packets, say Y; you 201da177e4SLinus Torvalds will then be presented with several options that allow more precise 211da177e4SLinus Torvalds control about the routing process. 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds The answer to this question won't directly affect the kernel: 241da177e4SLinus Torvalds answering N will just cause the configurator to skip all the 251da177e4SLinus Torvalds questions about advanced routing. 261da177e4SLinus Torvalds 271da177e4SLinus Torvalds Note that your box can only act as a router if you enable IP 281da177e4SLinus Torvalds forwarding in your kernel; you can do that by saying Y to "/proc 291da177e4SLinus Torvalds file system support" and "Sysctl support" below and executing the 301da177e4SLinus Torvalds line 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds echo "1" > /proc/sys/net/ipv4/ip_forward 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds at boot time after the /proc file system has been mounted. 351da177e4SLinus Torvalds 36b2cc46a8SJesper Dangaard Brouer If you turn on IP forwarding, you should consider the rp_filter, which 371da177e4SLinus Torvalds automatically rejects incoming packets if the routing table entry 381da177e4SLinus Torvalds for their source address doesn't match the network interface they're 391da177e4SLinus Torvalds arriving on. This has security advantages because it prevents the 401da177e4SLinus Torvalds so-called IP spoofing, however it can pose problems if you use 411da177e4SLinus Torvalds asymmetric routing (packets from you to a host take a different path 421da177e4SLinus Torvalds than packets from that host to you) or if you operate a non-routing 431da177e4SLinus Torvalds host which has several IP addresses on different interfaces. To turn 44d7394372SDave Jones rp_filter on use: 451da177e4SLinus Torvalds 46d7394372SDave Jones echo 1 > /proc/sys/net/ipv4/conf/<device>/rp_filter 47750e9fadSNicolas Dichtel or 48d7394372SDave Jones echo 1 > /proc/sys/net/ipv4/conf/all/rp_filter 491da177e4SLinus Torvalds 50b2cc46a8SJesper Dangaard Brouer Note that some distributions enable it in startup scripts. 51d18921a0SJesper Dangaard Brouer For details about rp_filter strict and loose mode read 52d18921a0SJesper Dangaard Brouer <file:Documentation/networking/ip-sysctl.txt>. 53b2cc46a8SJesper Dangaard Brouer 541da177e4SLinus Torvalds If unsure, say N here. 551da177e4SLinus Torvalds 5666a2f7fdSStephen Hemmingerconfig IP_FIB_TRIE_STATS 5766a2f7fdSStephen Hemminger bool "FIB TRIE statistics" 583630b7c0SDavid S. Miller depends on IP_ADVANCED_ROUTER 5966a2f7fdSStephen Hemminger ---help--- 6066a2f7fdSStephen Hemminger Keep track of statistics on structure of FIB TRIE table. 6166a2f7fdSStephen Hemminger Useful for testing and measuring TRIE performance. 6266a2f7fdSStephen Hemminger 631da177e4SLinus Torvaldsconfig IP_MULTIPLE_TABLES 641da177e4SLinus Torvalds bool "IP: policy routing" 651da177e4SLinus Torvalds depends on IP_ADVANCED_ROUTER 66e1ef4bf2SThomas Graf select FIB_RULES 671da177e4SLinus Torvalds ---help--- 681da177e4SLinus Torvalds Normally, a router decides what to do with a received packet based 691da177e4SLinus Torvalds solely on the packet's final destination address. If you say Y here, 701da177e4SLinus Torvalds the Linux router will also be able to take the packet's source 711da177e4SLinus Torvalds address into account. Furthermore, the TOS (Type-Of-Service) field 721da177e4SLinus Torvalds of the packet can be used for routing decisions as well. 731da177e4SLinus Torvalds 7412ed3772SStephen Hemminger If you need more information, see the Linux Advanced 7512ed3772SStephen Hemminger Routing and Traffic Control documentation at 7612ed3772SStephen Hemminger <http://lartc.org/howto/lartc.rpdb.html> 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds If unsure, say N. 791da177e4SLinus Torvalds 801da177e4SLinus Torvaldsconfig IP_ROUTE_MULTIPATH 811da177e4SLinus Torvalds bool "IP: equal cost multipath" 821da177e4SLinus Torvalds depends on IP_ADVANCED_ROUTER 831da177e4SLinus Torvalds help 841da177e4SLinus Torvalds Normally, the routing tables specify a single action to be taken in 851da177e4SLinus Torvalds a deterministic manner for a given packet. If you say Y here 861da177e4SLinus Torvalds however, it becomes possible to attach several actions to a packet 871da177e4SLinus Torvalds pattern, in effect specifying several alternative paths to travel 881da177e4SLinus Torvalds for those packets. The router considers all these paths to be of 891da177e4SLinus Torvalds equal "cost" and chooses one of them in a non-deterministic fashion 901da177e4SLinus Torvalds if a matching packet arrives. 911da177e4SLinus Torvalds 921da177e4SLinus Torvaldsconfig IP_ROUTE_VERBOSE 931da177e4SLinus Torvalds bool "IP: verbose route monitoring" 941da177e4SLinus Torvalds depends on IP_ADVANCED_ROUTER 951da177e4SLinus Torvalds help 961da177e4SLinus Torvalds If you say Y here, which is recommended, then the kernel will print 971da177e4SLinus Torvalds verbose messages regarding the routing, for example warnings about 981da177e4SLinus Torvalds received packets which look strange and could be evidence of an 991da177e4SLinus Torvalds attack or a misconfigured system somewhere. The information is 1001da177e4SLinus Torvalds handled by the klogd daemon which is responsible for kernel messages 1011da177e4SLinus Torvalds ("man klogd"). 1021da177e4SLinus Torvalds 103c7066f70SPatrick McHardyconfig IP_ROUTE_CLASSID 104c7066f70SPatrick McHardy bool 105c7066f70SPatrick McHardy 1061da177e4SLinus Torvaldsconfig IP_PNP 1071da177e4SLinus Torvalds bool "IP: kernel level autoconfiguration" 1081da177e4SLinus Torvalds help 1091da177e4SLinus Torvalds This enables automatic configuration of IP addresses of devices and 1101da177e4SLinus Torvalds of the routing table during kernel boot, based on either information 1111da177e4SLinus Torvalds supplied on the kernel command line or by BOOTP or RARP protocols. 1121da177e4SLinus Torvalds You need to say Y only for diskless machines requiring network 1131da177e4SLinus Torvalds access to boot (in which case you want to say Y to "Root file system 1141da177e4SLinus Torvalds on NFS" as well), because all other machines configure the network 1151da177e4SLinus Torvalds in their startup scripts. 1161da177e4SLinus Torvalds 1171da177e4SLinus Torvaldsconfig IP_PNP_DHCP 1181da177e4SLinus Torvalds bool "IP: DHCP support" 1191da177e4SLinus Torvalds depends on IP_PNP 1201da177e4SLinus Torvalds ---help--- 1211da177e4SLinus Torvalds If you want your Linux box to mount its whole root file system (the 1221da177e4SLinus Torvalds one containing the directory /) from some other computer over the 1231da177e4SLinus Torvalds net via NFS and you want the IP address of your computer to be 1241da177e4SLinus Torvalds discovered automatically at boot time using the DHCP protocol (a 1251da177e4SLinus Torvalds special protocol designed for doing this job), say Y here. In case 1261da177e4SLinus Torvalds the boot ROM of your network card was designed for booting Linux and 1271da177e4SLinus Torvalds does DHCP itself, providing all necessary information on the kernel 1281da177e4SLinus Torvalds command line, you can say N here. 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds If unsure, say Y. Note that if you want to use DHCP, a DHCP server 1311da177e4SLinus Torvalds must be operating on your network. Read 132dc7a0816SJ. Bruce Fields <file:Documentation/filesystems/nfs/nfsroot.txt> for details. 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvaldsconfig IP_PNP_BOOTP 1351da177e4SLinus Torvalds bool "IP: BOOTP support" 1361da177e4SLinus Torvalds depends on IP_PNP 1371da177e4SLinus Torvalds ---help--- 1381da177e4SLinus Torvalds If you want your Linux box to mount its whole root file system (the 1391da177e4SLinus Torvalds one containing the directory /) from some other computer over the 1401da177e4SLinus Torvalds net via NFS and you want the IP address of your computer to be 1411da177e4SLinus Torvalds discovered automatically at boot time using the BOOTP protocol (a 1421da177e4SLinus Torvalds special protocol designed for doing this job), say Y here. In case 1431da177e4SLinus Torvalds the boot ROM of your network card was designed for booting Linux and 1441da177e4SLinus Torvalds does BOOTP itself, providing all necessary information on the kernel 1451da177e4SLinus Torvalds command line, you can say N here. If unsure, say Y. Note that if you 1461da177e4SLinus Torvalds want to use BOOTP, a BOOTP server must be operating on your network. 147dc7a0816SJ. Bruce Fields Read <file:Documentation/filesystems/nfs/nfsroot.txt> for details. 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvaldsconfig IP_PNP_RARP 1501da177e4SLinus Torvalds bool "IP: RARP support" 1511da177e4SLinus Torvalds depends on IP_PNP 1521da177e4SLinus Torvalds help 1531da177e4SLinus Torvalds If you want your Linux box to mount its whole root file system (the 1541da177e4SLinus Torvalds one containing the directory /) from some other computer over the 1551da177e4SLinus Torvalds net via NFS and you want the IP address of your computer to be 1561da177e4SLinus Torvalds discovered automatically at boot time using the RARP protocol (an 1571da177e4SLinus Torvalds older protocol which is being obsoleted by BOOTP and DHCP), say Y 1581da177e4SLinus Torvalds here. Note that if you want to use RARP, a RARP server must be 1596ded55daSJ. Bruce Fields operating on your network. Read 160dc7a0816SJ. Bruce Fields <file:Documentation/filesystems/nfs/nfsroot.txt> for details. 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvaldsconfig NET_IPIP 1631da177e4SLinus Torvalds tristate "IP: tunneling" 164d2acc347SHerbert Xu select INET_TUNNEL 165fd58156eSPravin B Shelar select NET_IP_TUNNEL 1661da177e4SLinus Torvalds ---help--- 1671da177e4SLinus Torvalds Tunneling means encapsulating data of one protocol type within 1681da177e4SLinus Torvalds another protocol and sending it over a channel that understands the 1691da177e4SLinus Torvalds encapsulating protocol. This particular tunneling driver implements 1701da177e4SLinus Torvalds encapsulation of IP within IP, which sounds kind of pointless, but 1711da177e4SLinus Torvalds can be useful if you want to make your (or some other) machine 1721da177e4SLinus Torvalds appear on a different network than it physically is, or to use 1731da177e4SLinus Torvalds mobile-IP facilities (allowing laptops to seamlessly move between 1741da177e4SLinus Torvalds networks without changing their IP addresses). 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds Saying Y to this option will produce two modules ( = code which can 1771da177e4SLinus Torvalds be inserted in and removed from the running kernel whenever you 1781da177e4SLinus Torvalds want). Most people won't need this and can say N. 1791da177e4SLinus Torvalds 18000959adeSDmitry Kozlovconfig NET_IPGRE_DEMUX 18100959adeSDmitry Kozlov tristate "IP: GRE demultiplexer" 18200959adeSDmitry Kozlov help 18300959adeSDmitry Kozlov This is helper module to demultiplex GRE packets on GRE version field criteria. 18400959adeSDmitry Kozlov Required by ip_gre and pptp modules. 18500959adeSDmitry Kozlov 186c5441932SPravin B Shelarconfig NET_IP_TUNNEL 187c5441932SPravin B Shelar tristate 188e09acddfSPaolo Abeni select DST_CACHE 18997e219b7SEric Dumazet select GRO_CELLS 190c5441932SPravin B Shelar default n 191c5441932SPravin B Shelar 1921da177e4SLinus Torvaldsconfig NET_IPGRE 1931da177e4SLinus Torvalds tristate "IP: GRE tunnels over IP" 19421a180cdSDavid S. Miller depends on (IPV6 || IPV6=n) && NET_IPGRE_DEMUX 195c5441932SPravin B Shelar select NET_IP_TUNNEL 1961da177e4SLinus Torvalds help 1971da177e4SLinus Torvalds Tunneling means encapsulating data of one protocol type within 1981da177e4SLinus Torvalds another protocol and sending it over a channel that understands the 1991da177e4SLinus Torvalds encapsulating protocol. This particular tunneling driver implements 2001da177e4SLinus Torvalds GRE (Generic Routing Encapsulation) and at this time allows 2011da177e4SLinus Torvalds encapsulating of IPv4 or IPv6 over existing IPv4 infrastructure. 2021da177e4SLinus Torvalds This driver is useful if the other endpoint is a Cisco router: Cisco 2031da177e4SLinus Torvalds likes GRE much better than the other Linux tunneling driver ("IP 2041da177e4SLinus Torvalds tunneling" above). In addition, GRE allows multicast redistribution 2051da177e4SLinus Torvalds through the tunnel. 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvaldsconfig NET_IPGRE_BROADCAST 2081da177e4SLinus Torvalds bool "IP: broadcast GRE over IP" 2091da177e4SLinus Torvalds depends on IP_MULTICAST && NET_IPGRE 2101da177e4SLinus Torvalds help 2111da177e4SLinus Torvalds One application of GRE/IP is to construct a broadcast WAN (Wide Area 2121da177e4SLinus Torvalds Network), which looks like a normal Ethernet LAN (Local Area 2131da177e4SLinus Torvalds Network), but can be distributed all over the Internet. If you want 2141da177e4SLinus Torvalds to do that, say Y here and to "IP multicast routing" below. 2151da177e4SLinus Torvalds 2166853f21fSYuval Mintzconfig IP_MROUTE_COMMON 2176853f21fSYuval Mintz bool 2186853f21fSYuval Mintz depends on IP_MROUTE || IPV6_MROUTE 2196853f21fSYuval Mintz 2201da177e4SLinus Torvaldsconfig IP_MROUTE 2211da177e4SLinus Torvalds bool "IP: multicast routing" 2221da177e4SLinus Torvalds depends on IP_MULTICAST 2236853f21fSYuval Mintz select IP_MROUTE_COMMON 2241da177e4SLinus Torvalds help 2251da177e4SLinus Torvalds This is used if you want your machine to act as a router for IP 2261da177e4SLinus Torvalds packets that have several destination addresses. It is needed on the 2271da177e4SLinus Torvalds MBONE, a high bandwidth network on top of the Internet which carries 2281da177e4SLinus Torvalds audio and video broadcasts. In order to do that, you would most 2294960c2c6SJean Sacren likely run the program mrouted. If you haven't heard about it, you 2304960c2c6SJean Sacren don't need it. 2311da177e4SLinus Torvalds 232f0ad0860SPatrick McHardyconfig IP_MROUTE_MULTIPLE_TABLES 233f0ad0860SPatrick McHardy bool "IP: multicast policy routing" 23466496d49SPatrick McHardy depends on IP_MROUTE && IP_ADVANCED_ROUTER 235f0ad0860SPatrick McHardy select FIB_RULES 236f0ad0860SPatrick McHardy help 237f0ad0860SPatrick McHardy Normally, a multicast router runs a userspace daemon and decides 238f0ad0860SPatrick McHardy what to do with a multicast packet based on the source and 239f0ad0860SPatrick McHardy destination addresses. If you say Y here, the multicast router 240f0ad0860SPatrick McHardy will also be able to take interfaces and packet marks into 241f0ad0860SPatrick McHardy account and run multiple instances of userspace daemons 242f0ad0860SPatrick McHardy simultaneously, each one handling a single table. 243f0ad0860SPatrick McHardy 244f0ad0860SPatrick McHardy If unsure, say N. 245f0ad0860SPatrick McHardy 2461da177e4SLinus Torvaldsconfig IP_PIMSM_V1 2471da177e4SLinus Torvalds bool "IP: PIM-SM version 1 support" 2481da177e4SLinus Torvalds depends on IP_MROUTE 2491da177e4SLinus Torvalds help 2501da177e4SLinus Torvalds Kernel side support for Sparse Mode PIM (Protocol Independent 2511da177e4SLinus Torvalds Multicast) version 1. This multicast routing protocol is used widely 2521da177e4SLinus Torvalds because Cisco supports it. You need special software to use it 2531da177e4SLinus Torvalds (pimd-v1). Please see <http://netweb.usc.edu/pim/> for more 2541da177e4SLinus Torvalds information about PIM. 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds Say Y if you want to use PIM-SM v1. Note that you can say N here if 2571da177e4SLinus Torvalds you just want to use Dense Mode PIM. 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvaldsconfig IP_PIMSM_V2 2601da177e4SLinus Torvalds bool "IP: PIM-SM version 2 support" 2611da177e4SLinus Torvalds depends on IP_MROUTE 2621da177e4SLinus Torvalds help 2631da177e4SLinus Torvalds Kernel side support for Sparse Mode PIM version 2. In order to use 2641da177e4SLinus Torvalds this, you need an experimental routing daemon supporting it (pimd or 2651da177e4SLinus Torvalds gated-5). This routing protocol is not used widely, so say N unless 2661da177e4SLinus Torvalds you want to play with it. 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvaldsconfig SYN_COOKIES 26957f1553eSFlorian Westphal bool "IP: TCP syncookie support" 2701da177e4SLinus Torvalds ---help--- 2711da177e4SLinus Torvalds Normal TCP/IP networking is open to an attack known as "SYN 2721da177e4SLinus Torvalds flooding". This denial-of-service attack prevents legitimate remote 2731da177e4SLinus Torvalds users from being able to connect to your computer during an ongoing 2741da177e4SLinus Torvalds attack and requires very little work from the attacker, who can 2751da177e4SLinus Torvalds operate from anywhere on the Internet. 2761da177e4SLinus Torvalds 2771da177e4SLinus Torvalds SYN cookies provide protection against this type of attack. If you 2781da177e4SLinus Torvalds say Y here, the TCP/IP stack will use a cryptographic challenge 2791da177e4SLinus Torvalds protocol known as "SYN cookies" to enable legitimate users to 2801da177e4SLinus Torvalds continue to connect, even when your machine is under attack. There 2811da177e4SLinus Torvalds is no need for the legitimate users to change their TCP/IP software; 2821da177e4SLinus Torvalds SYN cookies work transparently to them. For technical information 2831da177e4SLinus Torvalds about SYN cookies, check out <http://cr.yp.to/syncookies.html>. 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds If you are SYN flooded, the source address reported by the kernel is 2861da177e4SLinus Torvalds likely to have been forged by the attacker; it is only reported as 2871da177e4SLinus Torvalds an aid in tracing the packets to their actual source and should not 2881da177e4SLinus Torvalds be taken as absolute truth. 2891da177e4SLinus Torvalds 2901da177e4SLinus Torvalds SYN cookies may prevent correct error reporting on clients when the 2911da177e4SLinus Torvalds server is really overloaded. If this happens frequently better turn 2921da177e4SLinus Torvalds them off. 2931da177e4SLinus Torvalds 29457f1553eSFlorian Westphal If you say Y here, you can disable SYN cookies at run time by 29557f1553eSFlorian Westphal saying Y to "/proc file system support" and 2961da177e4SLinus Torvalds "Sysctl support" below and executing the command 2971da177e4SLinus Torvalds 29857f1553eSFlorian Westphal echo 0 > /proc/sys/net/ipv4/tcp_syncookies 2991da177e4SLinus Torvalds 30057f1553eSFlorian Westphal after the /proc file system has been mounted. 3011da177e4SLinus Torvalds 3021da177e4SLinus Torvalds If unsure, say N. 3031da177e4SLinus Torvalds 3041181412cSSaurabhconfig NET_IPVTI 3051181412cSSaurabh tristate "Virtual (secure) IP: tunneling" 3061181412cSSaurabh select INET_TUNNEL 307f61dd388SPravin B Shelar select NET_IP_TUNNEL 3084c145dceSFlorian Westphal select XFRM 3091181412cSSaurabh ---help--- 3101181412cSSaurabh Tunneling means encapsulating data of one protocol type within 3111181412cSSaurabh another protocol and sending it over a channel that understands the 3121181412cSSaurabh encapsulating protocol. This can be used with xfrm mode tunnel to give 3131181412cSSaurabh the notion of a secure tunnel for IPSEC and then use routing protocol 3141181412cSSaurabh on top. 3151181412cSSaurabh 3168024e028STom Herbertconfig NET_UDP_TUNNEL 3178024e028STom Herbert tristate 3187c5df8faSAndy Zhou select NET_IP_TUNNEL 3198024e028STom Herbert default n 3208024e028STom Herbert 32123461551STom Herbertconfig NET_FOU 32223461551STom Herbert tristate "IP: Foo (IP protocols) over UDP" 32323461551STom Herbert select XFRM 32423461551STom Herbert select NET_UDP_TUNNEL 32523461551STom Herbert ---help--- 32623461551STom Herbert Foo over UDP allows any IP protocol to be directly encapsulated 32723461551STom Herbert over UDP include tunnels (IPIP, GRE, SIT). By encapsulating in UDP 32823461551STom Herbert network mechanisms and optimizations for UDP (such as ECMP 32923461551STom Herbert and RSS) can be leveraged to provide better service. 33023461551STom Herbert 33163487babSTom Herbertconfig NET_FOU_IP_TUNNELS 33263487babSTom Herbert bool "IP: FOU encapsulation of IP tunnels" 33363487babSTom Herbert depends on NET_IPIP || NET_IPGRE || IPV6_SIT 33463487babSTom Herbert select NET_FOU 33563487babSTom Herbert ---help--- 33663487babSTom Herbert Allow configuration of FOU or GUE encapsulation for IP tunnels. 33763487babSTom Herbert When this option is enabled IP tunnels can be configured to use 33863487babSTom Herbert FOU or GUE encapsulation. 33963487babSTom Herbert 3401da177e4SLinus Torvaldsconfig INET_AH 3411da177e4SLinus Torvalds tristate "IP: AH transformation" 3427e152524SJan Beulich select XFRM_ALGO 3431da177e4SLinus Torvalds select CRYPTO 3441da177e4SLinus Torvalds select CRYPTO_HMAC 3451da177e4SLinus Torvalds select CRYPTO_MD5 3461da177e4SLinus Torvalds select CRYPTO_SHA1 3471da177e4SLinus Torvalds ---help--- 3481da177e4SLinus Torvalds Support for IPsec AH. 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds If unsure, say Y. 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvaldsconfig INET_ESP 3531da177e4SLinus Torvalds tristate "IP: ESP transformation" 3547e152524SJan Beulich select XFRM_ALGO 3551da177e4SLinus Torvalds select CRYPTO 356ed58dd41SHerbert Xu select CRYPTO_AUTHENC 3571da177e4SLinus Torvalds select CRYPTO_HMAC 3581da177e4SLinus Torvalds select CRYPTO_MD5 3596b7326c8SHerbert Xu select CRYPTO_CBC 3601da177e4SLinus Torvalds select CRYPTO_SHA1 3611da177e4SLinus Torvalds select CRYPTO_DES 36232b6170cSThomas Egerer select CRYPTO_ECHAINIV 3631da177e4SLinus Torvalds ---help--- 3641da177e4SLinus Torvalds Support for IPsec ESP. 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds If unsure, say Y. 3671da177e4SLinus Torvalds 3687785bba2SSteffen Klassertconfig INET_ESP_OFFLOAD 3697785bba2SSteffen Klassert tristate "IP: ESP transformation offload" 3707785bba2SSteffen Klassert depends on INET_ESP 3717785bba2SSteffen Klassert select XFRM_OFFLOAD 3727785bba2SSteffen Klassert default n 3737785bba2SSteffen Klassert ---help--- 3747785bba2SSteffen Klassert Support for ESP transformation offload. This makes sense 3757785bba2SSteffen Klassert only if this system really does IPsec and want to do it 3767785bba2SSteffen Klassert with high throughput. A typical desktop system does not 3777785bba2SSteffen Klassert need it, even if it does IPsec. 3787785bba2SSteffen Klassert 3797785bba2SSteffen Klassert If unsure, say N. 3807785bba2SSteffen Klassert 381e27cca96SSabrina Dubrocaconfig INET_ESPINTCP 382e27cca96SSabrina Dubroca bool "IP: ESP in TCP encapsulation (RFC 8229)" 383e27cca96SSabrina Dubroca depends on XFRM && INET_ESP 384e27cca96SSabrina Dubroca select STREAM_PARSER 385e27cca96SSabrina Dubroca select NET_SOCK_MSG 386e27cca96SSabrina Dubroca help 387e27cca96SSabrina Dubroca Support for RFC 8229 encapsulation of ESP and IKE over 388e27cca96SSabrina Dubroca TCP/IPv4 sockets. 389e27cca96SSabrina Dubroca 390e27cca96SSabrina Dubroca If unsure, say N. 391e27cca96SSabrina Dubroca 3921da177e4SLinus Torvaldsconfig INET_IPCOMP 3931da177e4SLinus Torvalds tristate "IP: IPComp transformation" 394d2acc347SHerbert Xu select INET_XFRM_TUNNEL 3956fccab67SHerbert Xu select XFRM_IPCOMP 3961da177e4SLinus Torvalds ---help--- 3971da177e4SLinus Torvalds Support for IP Payload Compression Protocol (IPComp) (RFC3173), 3981da177e4SLinus Torvalds typically needed for IPsec. 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds If unsure, say Y. 4011da177e4SLinus Torvalds 402d2acc347SHerbert Xuconfig INET_XFRM_TUNNEL 403d2acc347SHerbert Xu tristate 404d2acc347SHerbert Xu select INET_TUNNEL 405d2acc347SHerbert Xu default n 4061da177e4SLinus Torvalds 407d2acc347SHerbert Xuconfig INET_TUNNEL 408d2acc347SHerbert Xu tristate 409d2acc347SHerbert Xu default n 4101da177e4SLinus Torvalds 41117b085eaSArnaldo Carvalho de Meloconfig INET_DIAG 41217b085eaSArnaldo Carvalho de Melo tristate "INET: socket monitoring interface" 4131da177e4SLinus Torvalds default y 4141da177e4SLinus Torvalds ---help--- 41573c1f4a0SArnaldo Carvalho de Melo Support for INET (TCP, DCCP, etc) socket monitoring interface used by 41673c1f4a0SArnaldo Carvalho de Melo native Linux tools such as ss. ss is included in iproute2, currently 417c996d8b9SMichael Witten downloadable at: 418c996d8b9SMichael Witten 419c996d8b9SMichael Witten http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2 4201da177e4SLinus Torvalds 4211da177e4SLinus Torvalds If unsure, say Y. 4221da177e4SLinus Torvalds 42317b085eaSArnaldo Carvalho de Meloconfig INET_TCP_DIAG 42417b085eaSArnaldo Carvalho de Melo depends on INET_DIAG 42517b085eaSArnaldo Carvalho de Melo def_tristate INET_DIAG 42617b085eaSArnaldo Carvalho de Melo 427507dd796SPavel Emelyanovconfig INET_UDP_DIAG 4286d62a66eSDavid S. Miller tristate "UDP: socket monitoring interface" 4296d25886eSAnisse Astier depends on INET_DIAG && (IPV6 || IPV6=n) 4306d62a66eSDavid S. Miller default n 4316d62a66eSDavid S. Miller ---help--- 4326d62a66eSDavid S. Miller Support for UDP socket monitoring interface used by the ss tool. 4336d62a66eSDavid S. Miller If unsure, say Y. 434507dd796SPavel Emelyanov 435432490f9SCyrill Gorcunovconfig INET_RAW_DIAG 436432490f9SCyrill Gorcunov tristate "RAW: socket monitoring interface" 437432490f9SCyrill Gorcunov depends on INET_DIAG && (IPV6 || IPV6=n) 438432490f9SCyrill Gorcunov default n 439432490f9SCyrill Gorcunov ---help--- 440432490f9SCyrill Gorcunov Support for RAW socket monitoring interface used by the ss tool. 441432490f9SCyrill Gorcunov If unsure, say Y. 442432490f9SCyrill Gorcunov 443c1e64e29SLorenzo Colitticonfig INET_DIAG_DESTROY 444c1e64e29SLorenzo Colitti bool "INET: allow privileged process to administratively close sockets" 445c1e64e29SLorenzo Colitti depends on INET_DIAG 446c1e64e29SLorenzo Colitti default n 447c1e64e29SLorenzo Colitti ---help--- 448c1e64e29SLorenzo Colitti Provides a SOCK_DESTROY operation that allows privileged processes 449c1e64e29SLorenzo Colitti (e.g., a connection manager or a network administration tool such as 450c1e64e29SLorenzo Colitti ss) to close sockets opened by other processes. Closing a socket in 451c1e64e29SLorenzo Colitti this way interrupts any blocking read/write/connect operations on 452c1e64e29SLorenzo Colitti the socket and causes future socket calls to behave as if the socket 453c1e64e29SLorenzo Colitti had been disconnected. 454c1e64e29SLorenzo Colitti If unsure, say N. 455c1e64e29SLorenzo Colitti 4563d2573f7SStephen Hemmingermenuconfig TCP_CONG_ADVANCED 457a6484045SDavid S. Miller bool "TCP: advanced congestion control" 458a6484045SDavid S. Miller ---help--- 459a6484045SDavid S. Miller Support for selection of various TCP congestion control 460a6484045SDavid S. Miller modules. 461a6484045SDavid S. Miller 462a6484045SDavid S. Miller Nearly all users can safely say no here, and a safe default 463597811ecSStephen Hemminger selection will be made (CUBIC with new Reno as a fallback). 464a6484045SDavid S. Miller 465a6484045SDavid S. Miller If unsure, say N. 466a6484045SDavid S. Miller 4673d2573f7SStephen Hemmingerif TCP_CONG_ADVANCED 46883803034SStephen Hemminger 46983803034SStephen Hemmingerconfig TCP_CONG_BIC 47083803034SStephen Hemminger tristate "Binary Increase Congestion (BIC) control" 471597811ecSStephen Hemminger default m 47283803034SStephen Hemminger ---help--- 47383803034SStephen Hemminger BIC-TCP is a sender-side only change that ensures a linear RTT 47483803034SStephen Hemminger fairness under large windows while offering both scalability and 47583803034SStephen Hemminger bounded TCP-friendliness. The protocol combines two schemes 47683803034SStephen Hemminger called additive increase and binary search increase. When the 47783803034SStephen Hemminger congestion window is large, additive increase with a large 47883803034SStephen Hemminger increment ensures linear RTT fairness as well as good 47983803034SStephen Hemminger scalability. Under small congestion windows, binary search 48083803034SStephen Hemminger increase provides TCP friendliness. 48183803034SStephen Hemminger See http://www.csc.ncsu.edu/faculty/rhee/export/bitcp/ 48283803034SStephen Hemminger 483df3271f3SStephen Hemmingerconfig TCP_CONG_CUBIC 484df3271f3SStephen Hemminger tristate "CUBIC TCP" 485597811ecSStephen Hemminger default y 486df3271f3SStephen Hemminger ---help--- 487df3271f3SStephen Hemminger This is version 2.0 of BIC-TCP which uses a cubic growth function 488df3271f3SStephen Hemminger among other techniques. 489df3271f3SStephen Hemminger See http://www.csc.ncsu.edu/faculty/rhee/export/bitcp/cubic-paper.pdf 490df3271f3SStephen Hemminger 49187270762SStephen Hemmingerconfig TCP_CONG_WESTWOOD 49287270762SStephen Hemminger tristate "TCP Westwood+" 49387270762SStephen Hemminger default m 49487270762SStephen Hemminger ---help--- 49587270762SStephen Hemminger TCP Westwood+ is a sender-side only modification of the TCP Reno 49687270762SStephen Hemminger protocol stack that optimizes the performance of TCP congestion 49787270762SStephen Hemminger control. It is based on end-to-end bandwidth estimation to set 49887270762SStephen Hemminger congestion window and slow start threshold after a congestion 49987270762SStephen Hemminger episode. Using this estimation, TCP Westwood+ adaptively sets a 50087270762SStephen Hemminger slow start threshold and a congestion window which takes into 50187270762SStephen Hemminger account the bandwidth used at the time congestion is experienced. 50287270762SStephen Hemminger TCP Westwood+ significantly increases fairness wrt TCP Reno in 50387270762SStephen Hemminger wired networks and throughput over wireless links. 50487270762SStephen Hemminger 505a7868ea6SBaruch Evenconfig TCP_CONG_HTCP 506a7868ea6SBaruch Even tristate "H-TCP" 507a7868ea6SBaruch Even default m 508a7868ea6SBaruch Even ---help--- 509a7868ea6SBaruch Even H-TCP is a send-side only modifications of the TCP Reno 510a7868ea6SBaruch Even protocol stack that optimizes the performance of TCP 511a7868ea6SBaruch Even congestion control for high speed network links. It uses a 512a7868ea6SBaruch Even modeswitch to change the alpha and beta parameters of TCP Reno 513a7868ea6SBaruch Even based on network conditions and in a way so as to be fair with 514a7868ea6SBaruch Even other Reno and H-TCP flows. 515a7868ea6SBaruch Even 516a628d29bSJohn Heffnerconfig TCP_CONG_HSTCP 517a628d29bSJohn Heffner tristate "High Speed TCP" 518a628d29bSJohn Heffner default n 519a628d29bSJohn Heffner ---help--- 520a628d29bSJohn Heffner Sally Floyd's High Speed TCP (RFC 3649) congestion control. 521a628d29bSJohn Heffner A modification to TCP's congestion control mechanism for use 522a628d29bSJohn Heffner with large congestion windows. A table indicates how much to 523a628d29bSJohn Heffner increase the congestion window by when an ACK is received. 524a628d29bSJohn Heffner For more detail see http://www.icir.org/floyd/hstcp.html 525a628d29bSJohn Heffner 526835b3f0cSDaniele Lacameraconfig TCP_CONG_HYBLA 527835b3f0cSDaniele Lacamera tristate "TCP-Hybla congestion control algorithm" 528835b3f0cSDaniele Lacamera default n 529835b3f0cSDaniele Lacamera ---help--- 530835b3f0cSDaniele Lacamera TCP-Hybla is a sender-side only change that eliminates penalization of 531835b3f0cSDaniele Lacamera long-RTT, large-bandwidth connections, like when satellite legs are 53244c09201SMatt LaPlante involved, especially when sharing a common bottleneck with normal 533835b3f0cSDaniele Lacamera terrestrial connections. 534835b3f0cSDaniele Lacamera 535b87d8561SStephen Hemmingerconfig TCP_CONG_VEGAS 536b87d8561SStephen Hemminger tristate "TCP Vegas" 537b87d8561SStephen Hemminger default n 538b87d8561SStephen Hemminger ---help--- 539b87d8561SStephen Hemminger TCP Vegas is a sender-side only change to TCP that anticipates 540b87d8561SStephen Hemminger the onset of congestion by estimating the bandwidth. TCP Vegas 541b87d8561SStephen Hemminger adjusts the sending rate by modifying the congestion 542b87d8561SStephen Hemminger window. TCP Vegas should provide less packet loss, but it is 543b87d8561SStephen Hemminger not as aggressive as TCP Reno. 544b87d8561SStephen Hemminger 545699fafafSLawrence Brakmoconfig TCP_CONG_NV 546699fafafSLawrence Brakmo tristate "TCP NV" 547699fafafSLawrence Brakmo default n 548699fafafSLawrence Brakmo ---help--- 549699fafafSLawrence Brakmo TCP NV is a follow up to TCP Vegas. It has been modified to deal with 550699fafafSLawrence Brakmo 10G networks, measurement noise introduced by LRO, GRO and interrupt 551699fafafSLawrence Brakmo coalescence. In addition, it will decrease its cwnd multiplicatively 552699fafafSLawrence Brakmo instead of linearly. 553699fafafSLawrence Brakmo 554699fafafSLawrence Brakmo Note that in general congestion avoidance (cwnd decreased when # packets 555699fafafSLawrence Brakmo queued grows) cannot coexist with congestion control (cwnd decreased only 556699fafafSLawrence Brakmo when there is packet loss) due to fairness issues. One scenario when they 557699fafafSLawrence Brakmo can coexist safely is when the CA flows have RTTs << CC flows RTTs. 558699fafafSLawrence Brakmo 559699fafafSLawrence Brakmo For further details see http://www.brakmo.org/networking/tcp-nv/ 560699fafafSLawrence Brakmo 5610e57976bSJohn Heffnerconfig TCP_CONG_SCALABLE 5620e57976bSJohn Heffner tristate "Scalable TCP" 5630e57976bSJohn Heffner default n 5640e57976bSJohn Heffner ---help--- 5650e57976bSJohn Heffner Scalable TCP is a sender-side only change to TCP which uses a 5660e57976bSJohn Heffner MIMD congestion control algorithm which has some nice scaling 5670e57976bSJohn Heffner properties, though is known to have fairness issues. 568f4b9479dSBaruch Even See http://www.deneholme.net/tom/scalable/ 569a7868ea6SBaruch Even 5707c106d7eSWong Hoi Sing Edisonconfig TCP_CONG_LP 5717c106d7eSWong Hoi Sing Edison tristate "TCP Low Priority" 5727c106d7eSWong Hoi Sing Edison default n 5737c106d7eSWong Hoi Sing Edison ---help--- 5747c106d7eSWong Hoi Sing Edison TCP Low Priority (TCP-LP), a distributed algorithm whose goal is 575cab00891SMatt LaPlante to utilize only the excess network bandwidth as compared to the 5767c106d7eSWong Hoi Sing Edison ``fair share`` of bandwidth as targeted by TCP. 5777c106d7eSWong Hoi Sing Edison See http://www-ece.rice.edu/networks/TCP-LP/ 5787c106d7eSWong Hoi Sing Edison 57976f10177SBin Zhouconfig TCP_CONG_VENO 58076f10177SBin Zhou tristate "TCP Veno" 58176f10177SBin Zhou default n 58276f10177SBin Zhou ---help--- 58376f10177SBin Zhou TCP Veno is a sender-side only enhancement of TCP to obtain better 58476f10177SBin Zhou throughput over wireless networks. TCP Veno makes use of state 58576f10177SBin Zhou distinguishing to circumvent the difficult judgment of the packet loss 58676f10177SBin Zhou type. TCP Veno cuts down less congestion window in response to random 58776f10177SBin Zhou loss packets. 588631dd1a8SJustin P. Mattock See <http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1177186> 58976f10177SBin Zhou 5905ef81475SAngelo P. Castellaniconfig TCP_CONG_YEAH 5915ef81475SAngelo P. Castellani tristate "YeAH TCP" 5922ff011efSDavid S. Miller select TCP_CONG_VEGAS 5935ef81475SAngelo P. Castellani default n 5945ef81475SAngelo P. Castellani ---help--- 5955ef81475SAngelo P. Castellani YeAH-TCP is a sender-side high-speed enabled TCP congestion control 5965ef81475SAngelo P. Castellani algorithm, which uses a mixed loss/delay approach to compute the 5975ef81475SAngelo P. Castellani congestion window. It's design goals target high efficiency, 5985ef81475SAngelo P. Castellani internal, RTT and Reno fairness, resilience to link loss while 5995ef81475SAngelo P. Castellani keeping network elements load as low as possible. 6005ef81475SAngelo P. Castellani 6015ef81475SAngelo P. Castellani For further details look here: 6025ef81475SAngelo P. Castellani http://wil.cs.caltech.edu/pfldnet2007/paper/YeAH_TCP.pdf 6035ef81475SAngelo P. Castellani 604c462238dSStephen Hemmingerconfig TCP_CONG_ILLINOIS 605c462238dSStephen Hemminger tristate "TCP Illinois" 606c462238dSStephen Hemminger default n 607c462238dSStephen Hemminger ---help--- 60801dd2fbfSMatt LaPlante TCP-Illinois is a sender-side modification of TCP Reno for 609c462238dSStephen Hemminger high speed long delay links. It uses round-trip-time to 610c462238dSStephen Hemminger adjust the alpha and beta parameters to achieve a higher average 611c462238dSStephen Hemminger throughput and maintain fairness. 612c462238dSStephen Hemminger 613c462238dSStephen Hemminger For further details see: 614c462238dSStephen Hemminger http://www.ews.uiuc.edu/~shaoliu/tcpillinois/index.html 615c462238dSStephen Hemminger 616e3118e83SDaniel Borkmannconfig TCP_CONG_DCTCP 617e3118e83SDaniel Borkmann tristate "DataCenter TCP (DCTCP)" 618e3118e83SDaniel Borkmann default n 619e3118e83SDaniel Borkmann ---help--- 620e3118e83SDaniel Borkmann DCTCP leverages Explicit Congestion Notification (ECN) in the network to 621e3118e83SDaniel Borkmann provide multi-bit feedback to the end hosts. It is designed to provide: 622e3118e83SDaniel Borkmann 623e3118e83SDaniel Borkmann - High burst tolerance (incast due to partition/aggregate), 624e3118e83SDaniel Borkmann - Low latency (short flows, queries), 625e3118e83SDaniel Borkmann - High throughput (continuous data updates, large file transfers) with 626e3118e83SDaniel Borkmann commodity, shallow-buffered switches. 627e3118e83SDaniel Borkmann 628e3118e83SDaniel Borkmann All switches in the data center network running DCTCP must support 629e3118e83SDaniel Borkmann ECN marking and be configured for marking when reaching defined switch 630e3118e83SDaniel Borkmann buffer thresholds. The default ECN marking threshold heuristic for 631e3118e83SDaniel Borkmann DCTCP on switches is 20 packets (30KB) at 1Gbps, and 65 packets 632e3118e83SDaniel Borkmann (~100KB) at 10Gbps, but might need further careful tweaking. 633e3118e83SDaniel Borkmann 634e3118e83SDaniel Borkmann For further details see: 635e3118e83SDaniel Borkmann http://simula.stanford.edu/~alizade/Site/DCTCP_files/dctcp-final.pdf 636e3118e83SDaniel Borkmann 6372b0a8c9eSKenneth Klette Jonassenconfig TCP_CONG_CDG 6382b0a8c9eSKenneth Klette Jonassen tristate "CAIA Delay-Gradient (CDG)" 6392b0a8c9eSKenneth Klette Jonassen default n 6402b0a8c9eSKenneth Klette Jonassen ---help--- 6412b0a8c9eSKenneth Klette Jonassen CAIA Delay-Gradient (CDG) is a TCP congestion control that modifies 6422b0a8c9eSKenneth Klette Jonassen the TCP sender in order to: 6432b0a8c9eSKenneth Klette Jonassen 6442b0a8c9eSKenneth Klette Jonassen o Use the delay gradient as a congestion signal. 6452b0a8c9eSKenneth Klette Jonassen o Back off with an average probability that is independent of the RTT. 6462b0a8c9eSKenneth Klette Jonassen o Coexist with flows that use loss-based congestion control. 6472b0a8c9eSKenneth Klette Jonassen o Tolerate packet loss unrelated to congestion. 6482b0a8c9eSKenneth Klette Jonassen 6492b0a8c9eSKenneth Klette Jonassen For further details see: 6502b0a8c9eSKenneth Klette Jonassen D.A. Hayes and G. Armitage. "Revisiting TCP congestion control using 6512b0a8c9eSKenneth Klette Jonassen delay gradients." In Networking 2011. Preprint: http://goo.gl/No3vdg 6522b0a8c9eSKenneth Klette Jonassen 6530f8782eaSNeal Cardwellconfig TCP_CONG_BBR 6540f8782eaSNeal Cardwell tristate "BBR TCP" 6550f8782eaSNeal Cardwell default n 6560f8782eaSNeal Cardwell ---help--- 6570f8782eaSNeal Cardwell 6580f8782eaSNeal Cardwell BBR (Bottleneck Bandwidth and RTT) TCP congestion control aims to 6590f8782eaSNeal Cardwell maximize network utilization and minimize queues. It builds an explicit 6600f8782eaSNeal Cardwell model of the the bottleneck delivery rate and path round-trip 6610f8782eaSNeal Cardwell propagation delay. It tolerates packet loss and delay unrelated to 6620f8782eaSNeal Cardwell congestion. It can operate over LAN, WAN, cellular, wifi, or cable 6630f8782eaSNeal Cardwell modem links. It can coexist with flows that use loss-based congestion 6640f8782eaSNeal Cardwell control, and can operate with shallow buffers, deep buffers, 6650f8782eaSNeal Cardwell bufferbloat, policers, or AQM schemes that do not provide a delay 6660f8782eaSNeal Cardwell signal. It requires the fq ("Fair Queue") pacing packet scheduler. 6670f8782eaSNeal Cardwell 6683d2573f7SStephen Hemmingerchoice 6693d2573f7SStephen Hemminger prompt "Default TCP congestion control" 670597811ecSStephen Hemminger default DEFAULT_CUBIC 6713d2573f7SStephen Hemminger help 6723d2573f7SStephen Hemminger Select the TCP congestion control that will be used by default 6733d2573f7SStephen Hemminger for all connections. 6743d2573f7SStephen Hemminger 6753d2573f7SStephen Hemminger config DEFAULT_BIC 6763d2573f7SStephen Hemminger bool "Bic" if TCP_CONG_BIC=y 6773d2573f7SStephen Hemminger 6783d2573f7SStephen Hemminger config DEFAULT_CUBIC 6793d2573f7SStephen Hemminger bool "Cubic" if TCP_CONG_CUBIC=y 6803d2573f7SStephen Hemminger 6813d2573f7SStephen Hemminger config DEFAULT_HTCP 6823d2573f7SStephen Hemminger bool "Htcp" if TCP_CONG_HTCP=y 6833d2573f7SStephen Hemminger 684dd2acaa7SJan Engelhardt config DEFAULT_HYBLA 685dd2acaa7SJan Engelhardt bool "Hybla" if TCP_CONG_HYBLA=y 686dd2acaa7SJan Engelhardt 6873d2573f7SStephen Hemminger config DEFAULT_VEGAS 6883d2573f7SStephen Hemminger bool "Vegas" if TCP_CONG_VEGAS=y 6893d2573f7SStephen Hemminger 6906ce1a6dfSJan Engelhardt config DEFAULT_VENO 6916ce1a6dfSJan Engelhardt bool "Veno" if TCP_CONG_VENO=y 6926ce1a6dfSJan Engelhardt 6933d2573f7SStephen Hemminger config DEFAULT_WESTWOOD 6943d2573f7SStephen Hemminger bool "Westwood" if TCP_CONG_WESTWOOD=y 6953d2573f7SStephen Hemminger 696e3118e83SDaniel Borkmann config DEFAULT_DCTCP 697e3118e83SDaniel Borkmann bool "DCTCP" if TCP_CONG_DCTCP=y 698e3118e83SDaniel Borkmann 6992b0a8c9eSKenneth Klette Jonassen config DEFAULT_CDG 7002b0a8c9eSKenneth Klette Jonassen bool "CDG" if TCP_CONG_CDG=y 7012b0a8c9eSKenneth Klette Jonassen 7020f8782eaSNeal Cardwell config DEFAULT_BBR 7030f8782eaSNeal Cardwell bool "BBR" if TCP_CONG_BBR=y 7040f8782eaSNeal Cardwell 7053d2573f7SStephen Hemminger config DEFAULT_RENO 7063d2573f7SStephen Hemminger bool "Reno" 7073d2573f7SStephen Hemmingerendchoice 7083d2573f7SStephen Hemminger 7093d2573f7SStephen Hemmingerendif 71083803034SStephen Hemminger 711597811ecSStephen Hemmingerconfig TCP_CONG_CUBIC 7126c360767SDavid S. Miller tristate 713a6484045SDavid S. Miller depends on !TCP_CONG_ADVANCED 714a6484045SDavid S. Miller default y 715a6484045SDavid S. Miller 7163d2573f7SStephen Hemmingerconfig DEFAULT_TCP_CONG 7173d2573f7SStephen Hemminger string 7183d2573f7SStephen Hemminger default "bic" if DEFAULT_BIC 7193d2573f7SStephen Hemminger default "cubic" if DEFAULT_CUBIC 7203d2573f7SStephen Hemminger default "htcp" if DEFAULT_HTCP 721dd2acaa7SJan Engelhardt default "hybla" if DEFAULT_HYBLA 7223d2573f7SStephen Hemminger default "vegas" if DEFAULT_VEGAS 7233d2573f7SStephen Hemminger default "westwood" if DEFAULT_WESTWOOD 7246ce1a6dfSJan Engelhardt default "veno" if DEFAULT_VENO 7253d2573f7SStephen Hemminger default "reno" if DEFAULT_RENO 726e3118e83SDaniel Borkmann default "dctcp" if DEFAULT_DCTCP 7272b0a8c9eSKenneth Klette Jonassen default "cdg" if DEFAULT_CDG 7284df21dfcSJulian Wollrath default "bbr" if DEFAULT_BBR 729597811ecSStephen Hemminger default "cubic" 7303d2573f7SStephen Hemminger 731cfb6eeb4SYOSHIFUJI Hideakiconfig TCP_MD5SIG 73244fbe920SKees Cook bool "TCP: MD5 Signature Option support (RFC2385)" 733cfb6eeb4SYOSHIFUJI Hideaki select CRYPTO 734cfb6eeb4SYOSHIFUJI Hideaki select CRYPTO_MD5 735cfb6eeb4SYOSHIFUJI Hideaki ---help--- 7363dde6ad8SDavid Sterba RFC2385 specifies a method of giving MD5 protection to TCP sessions. 737cfb6eeb4SYOSHIFUJI Hideaki Its main (only?) use is to protect BGP sessions between core routers 738cfb6eeb4SYOSHIFUJI Hideaki on the Internet. 739cfb6eeb4SYOSHIFUJI Hideaki 740cfb6eeb4SYOSHIFUJI Hideaki If unsure, say N. 741