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 ] [ output-mark OUTPUT-MARK ]
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 [ -4 | -6 ] xfrm state deleteall [ ID ] [ mode MODE ] [ reqid REQID ] [ flag FLAG-LIST ]
ip [ -4 | -6 ] xfrm state list [ ID ] [ nokeys ] [ 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
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 [ -4 | -6 ] xfrm policy { deleteall | list } [ nosock ] [ 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 ]
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-nsid ] [ nokeys ] [ all
| LISTofXFRM-OBJECTS ]
LISTofXFRM-OBJECTS := [ LISTofXFRM-OBJECTS ] XFRM-OBJECT
XFRM-OBJECT := acquire | expire | SA | policy | aevent | report
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:
- the algorithm type: encryption (enc), authentication (auth or auth-trunc), authenticated encryption with associated data (aead), or compression (comp)
- the algorithm name ALGO-NAME (see below)
- (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
- (for auth-trunc only) the truncation length ALGO-TRUNC-LEN in bits
- (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.
- MARK
used to match xfrm policies and states
- OUTPUT-MARK
used to set the output mark to influence the routing of the packets emitted by the state
| 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 |
- nosock
filter (remove) all socket policies from the output.
- 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.
| 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