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IPSEC_SPIGRP

Section: Maintenance Commands (8)
Updated: 30 Nov 1998
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NAME

ipsec spigrp - group/ungroup IPSEC Security Associations

SYNOPSIS

ipsec spigrp dst1 spi1 proto1 [ dst2 spi2 proto2 [ dst3 spi3 proto3 [ dst4 spi4 proto4 ] ] ]

DESCRIPTION

Spigrp groups IPSEC Security Associations (SAs) together or ungroups previously grouped SAs. An entry in the IPSEC extended routing table can only point (via a destination address, a Security Parameters Index (SPI) and a protocol identifier) to one SA. If more than one transform must be applied to a given type of packet, this can be accomplished by setting up several SAs with the same destination address but potentially different SPIs and protocols, and grouping them with spigrp.

The SAs to be grouped, specified by destination address (DNS name lookup or IPv4 dotted quad), SPI ('0x'-prefixed hexadecimal number) and protocol ("ah", "esp" or "tun"), are listed from the inside transform to the outside; in other words, the transforms are applied in the order of the command line and removed in the reverse order. The resulting SA group is referred to by its first SA (by dst1, spi1 and proto1).

The SAs must already exist and must not already be part of a group.

If spigrp is invoked with only one SA specification, it ungroups the previously-grouped set of SAs containing the SA specified.

EXAMPLES

ipsec spigrp gw2 0x113 tun gw2 0x115 esp gw2 0x116 ah: groups 3 SAs together, all destined for gw2, but with an IP-in-IP tunnel SA applied first with SPI 0x113, then an ESP header to encrypt the packet with SPI 0x115, and finally an AH header to authenticate the packet with SPI 0x116.

FILES

/dev/ipsec

HISTORY

Written for the Linux FreeS/WAN project <http://www.xs4all.nl/~freeswan/> by Richard Guy Briggs.

BUGS

Yes, it really is limited to a maximum of four SAs, although admittedly it's hard to see why you would need more.

This document was created by man2html, using the manual pages.
Time: 21:22:50 GMT, February 08, 2000

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