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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 ]


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


FLAG := noecn | decap-dscp | nopmtudisc | wildrecv | icmp | af-unspec | align4 | esn


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


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 ]


ip xfrm policy flush [ ptype PTYPE ]


ip xfrm policy count


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 } ] }


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 | LISTofXFRM-OBJECTS ]

 

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 addadd new state into xfrm
ip xfrm state updateupdate existing state in xfrm
ip xfrm state allocspiallocate an SPI value
ip xfrm state deletedelete existing state in xfrm
ip xfrm state getget existing state in xfrm
ip xfrm state deletealldelete all existing state in xfrm
ip xfrm state listprint out the list of existing state in xfrm
ip xfrm state flushflush all state in xfrm
ip xfrm state countcount all existing state in xfrm
ip xfrm monitor state monitoring for xfrm objects

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(rmd610), 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 addadd a new policy
ip xfrm policy updateupdate an existing policy
ip xfrm policy deletedelete an existing policy
ip xfrm policy getget an existing policy
ip xfrm policy deletealldelete all existing xfrm policies
ip xfrm policy listprint out the list of xfrm policies
ip xfrm policy flushflush policies
ip xfrm policy countcount existing 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
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.

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
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).

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).

LEVEL
can be required (default) or use.

The xfrm objects to monitor can be optionally specified.

 

AUTHOR

Manpage revised by David Ward <david.ward@ll.mit.edu>


 

Index

NAME
SYNOPSIS
DESCRIPTION
AUTHOR


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