www.LinuxHowtos.org

IP\-XFRM

Section: Linux (8)
Updated: 20 Dec 2011
Index Return to Main Contents

NAME

ip-xfrm - transform configuration

SYNOPSIS

ip [ OPTIONS ] xfrm { COMMAND | help }

ip xfrm XFRM-OBJECT { COMMAND | help }

XFRM-OBJECT := state | policy | monitor

ip xfrm state { add | update } ID [ ALGO-LIST ] [ mode MODE ] [ mark MARK [ mask MASK ] ] [ reqid REQID ] [ seq SEQ ] [ replay-window SIZE ] [ replay-seq SEQ ] [ replay-oseq SEQ ] [ replay-seq-hi SEQ ] [ replay-oseq-hi SEQ ] [ flag FLAG-LIST ] [ sel SELECTOR ] [ LIMIT-LIST ] [ encap ENCAP ] [ coa ADDR[/PLEN] ] [ ctx CTX ] [ extra-flag EXTRA-FLAG-LIST ]

ip xfrm state allocspi ID [ mode MODE ] [ mark MARK [ mask MASK ] ] [ reqid REQID ] [ seq SEQ ] [ min SPI max SPI ]

ip xfrm state { delete | get } ID [ mark MARK [ mask MASK ] ]

ip xfrm state { deleteall | list } [ ID ] [ mode MODE ] [ reqid REQID ] [ flag FLAG-LIST ]

ip xfrm state flush [ proto XFRM-PROTO ]

ip xfrm state count

ID := [ src ADDR ] [ dst ADDR ] [ proto XFRM-PROTO ] [ spi SPI ]

XFRM-PROTO := esp | ah | comp | route2 | hao

ALGO-LIST := [ ALGO-LIST ] ALGO

ALGO := { enc | auth } ALGO-NAME ALGO-KEYMAT |
auth-trunc ALGO-NAME ALGO-KEYMAT ALGO-TRUNC-LEN |
aead ALGO-NAME ALGO-KEYMAT ALGO-ICV-LEN |
comp ALGO-NAME

MODE := transport | tunnel | beet | ro | in_trigger

FLAG-LIST := [ FLAG-LIST ] FLAG

SELECTOR := [ src ADDR[/PLEN] ] [ dst ADDR[/PLEN] ] [ dev DEV ]
[ UPSPEC ]

UPSPEC := proto { PROTO |
{ tcp | udp | sctp | dccp } [ sport PORT ] [ dport PORT ] |
{ icmp | ipv6-icmp | mobility-header } [ type NUMBER ] [ code NUMBER ] |
gre [ key { DOTTED-QUAD | NUMBER } ] }

LIMIT-LIST := [ LIMIT-LIST ] limit LIMIT

LIMIT := { time-soft | time-hard | time-use-soft | time-use-hard } SECONDS |
{ byte-soft | byte-hard } SIZE |
{ packet-soft | packet-hard } COUNT

ENCAP := { espinudp | espinudp-nonike } SPORT DPORT OADDR

EXTRA-FLAG-LIST := [ EXTRA-FLAG-LIST ] EXTRA-FLAG

EXTRA-FLAG := dont-encap-dscp

ip xfrm policy { add | update } SELECTOR dir DIR [ ctx CTX ] [ mark MARK [ mask MASK ] ] [ index INDEX ] [ ptype PTYPE ] [ action ACTION ] [ priority PRIORITY ] [ flag FLAG-LIST ] [ LIMIT-LIST ] [ TMPL-LIST ]

ip xfrm policy { delete | get } { SELECTOR | index INDEX } dir DIR [ ctx CTX ] [ mark MARK [ mask MASK ] ] [ ptype PTYPE ]

ip xfrm policy { deleteall | list } [ SELECTOR ] [ dir DIR ] [ index INDEX ] [ ptype PTYPE ] [ action ACTION ] [ priority PRIORITY ] [ flag FLAG-LIST]

ip xfrm policy flush [ ptype PTYPE ]

ip xfrm policy count

ip xfrm policy set [ hthresh4 LBITS RBITS ] [ hthresh6 LBITS RBITS ]

SELECTOR := [ src ADDR[/PLEN] ] [ dst ADDR[/PLEN] ] [ dev DEV ] [ UPSPEC ]

DIR := in | out | fwd

PTYPE := main | sub

ACTION := allow | block

FLAG-LIST := [ FLAG-LIST ] FLAG

FLAG := localok | icmp

LIMIT-LIST := [ LIMIT-LIST ] limit LIMIT

LIMIT := { time-soft | time-hard | time-use-soft | time-use-hard } SECONDS |
{ byte-soft | byte-hard } SIZE |
{ packet-soft | packet-hard } COUNT

TMPL-LIST := [ TMPL-LIST ] tmpl TMPL

TMPL := ID [ mode MODE ] [ reqid REQID ] [ level LEVEL ]

ID := [ src ADDR ] [ dst ADDR ] [ proto XFRM-PROTO ] [ spi SPI ]

XFRM-PROTO := esp | ah | comp | route2 | hao

MODE := transport | tunnel | beet | ro | in_trigger

LEVEL := required | use

ip xfrm monitor [ all-nsid ] [ all
| LISTofXFRM-OBJECTS ]

LISTofXFRM-OBJECTS := [ LISTofXFRM-OBJECTS ] XFRM-OBJECT

DESCRIPTION

xfrm is an IP framework for transforming packets (such as encrypting their payloads). This framework is used to implement the IPsec protocol suite (with the state object operating on the Security Association Database, and the policy object operating on the Security Policy Database). It is also used for the IP Payload Compression Protocol and features of Mobile IPv6.

ip xfrm state add	add new state into xfrm
ip xfrm state update	update existing state in xfrm
ip xfrm state allocspi	allocate an SPI value
ip xfrm state delete	delete existing state in xfrm
ip xfrm state get	get existing state in xfrm
ip xfrm state deleteall	delete all existing state in xfrm
ip xfrm state list	print out the list of existing state in xfrm
ip xfrm state flush	flush all state in xfrm
ip xfrm state count	count all existing state in xfrm

ID

is specified by a source address, destination address, transform protocol XFRM-PROTO, and/or Security Parameter Index SPI. (For IP Payload Compression, the Compression Parameter Index or CPI is used for SPI.)

XFRM-PROTO

specifies a transform protocol: IPsec Encapsulating Security Payload (esp), IPsec Authentication Header (ah), IP Payload Compression (comp), Mobile IPv6 Type 2 Routing Header (route2), or Mobile IPv6 Home Address Option (hao).

ALGO-LIST

contains one or more algorithms to use. Each algorithm ALGO is specified by:

[bu]: the algorithm type: encryption (enc), authentication (auth or auth-trunc), authenticated encryption with associated data (aead), or compression (comp)
[bu]: the algorithm name ALGO-NAME (see below)
[bu]: (for all except comp) the keying material ALGO-KEYMAT, which may include both a key and a salt or nonce value; refer to the corresponding RFC
[bu]: (for auth-trunc only) the truncation length ALGO-TRUNC-LEN in bits
[bu]: (for aead only) the Integrity Check Value length ALGO-ICV-LEN in bits

Encryption algorithms include ecb(cipher_null), cbc(des), cbc(des3_ede), cbc(cast5), cbc(blowfish), cbc(aes), cbc(serpent), cbc(camellia), cbc(twofish), and rfc3686(ctr(aes)).

Authentication algorithms include digest_null, hmac(md5), hmac(sha1), hmac(sha256), hmac(sha384), hmac(sha512), hmac(rmd160), and xcbc(aes).

Authenticated encryption with associated data (AEAD) algorithms include rfc4106(gcm(aes)), rfc4309(ccm(aes)), and rfc4543(gcm(aes)).

Compression algorithms include deflate, lzs, and lzjh.

MODE

specifies a mode of operation for the transform protocol. IPsec and IP Payload Compression modes are transport, tunnel, and (for IPsec ESP only) Bound End-to-End Tunnel (beet). Mobile IPv6 modes are route optimization (ro) and inbound trigger (in_trigger).

FLAG-LIST

contains one or more of the following optional flags: noecn, decap-dscp, nopmtudisc, wildrecv, icmp, af-unspec, align4, or esn.

SELECTOR

selects the traffic that will be controlled by the policy, based on the source address, the destination address, the network device, and/or UPSPEC.

UPSPEC

selects traffic by protocol. For the tcp, udp, sctp, or dccp protocols, the source and destination port can optionally be specified. For the icmp, ipv6-icmp, or mobility-header protocols, the type and code numbers can optionally be specified. For the gre protocol, the key can optionally be specified as a dotted-quad or number. Other protocols can be selected by name or number PROTO.

LIMIT-LIST

sets limits in seconds, bytes, or numbers of packets.

ENCAP

encapsulates packets with protocol espinudp or espinudp-nonike, using source port SPORT, destination port DPORT , and original address OADDR.

ip xfrm policy add	add a new policy
ip xfrm policy update	update an existing policy
ip xfrm policy delete	delete an existing policy
ip xfrm policy get	get an existing policy
ip xfrm policy deleteall	delete all existing xfrm policies
ip xfrm policy list	print out the list of xfrm policies
ip xfrm policy flush	flush policies

SELECTOR

selects the traffic that will be controlled by the policy, based on the source address, the destination address, the network device, and/or UPSPEC.

UPSPEC

DIR

selects the policy direction as in, out, or fwd.

CTX

sets the security context.

PTYPE

can be main (default) or sub.

ACTION

can be allow (default) or block.

PRIORITY

is a number that defaults to zero.

FLAG-LIST

contains one or both of the following optional flags: local or icmp.

LIMIT-LIST

sets limits in seconds, bytes, or numbers of packets.

TMPL-LIST

is a template list specified using ID, MODE, REQID, and/or LEVEL.

ID

XFRM-PROTO

MODE

LEVEL

can be required (default) or use.

ip xfrm policy count

count existing policies

Use one or more -s options to display more details, including policy hash table information.

ip xfrm policy set

configure the policy hash table

Security policies whose address prefix lengths are greater than or equal policy hash table thresholds are hashed. Others are stored in the policy_inexact chained list.

LBITS

specifies the minimum local address prefix length of policies that are stored in the Security Policy Database hash table.

RBITS

specifies the minimum remote address prefix length of policies that are stored in the Security Policy Database hash table.

ip xfrm monitor

state monitoring for xfrm objects

The xfrm objects to monitor can be optionally specified.

If the all-nsid option is set, the program listens to all network namespaces that have a nsid assigned into the network namespace were the program is running. A prefix is displayed to show the network namespace where the message originates. Example:

[nsid 1]Flushed state proto 0

AUTHOR

Manpage revised by David Ward <david.ward@ll.mit.edu>
Manpage revised by Christophe Gouault <christophe.gouault@6wind.com>
Manpage revised by Nicolas Dichtel <nicolas.dichtel@6wind.com>