Ipsec Commands; Ah Authentication-Algorithm - HP 6125XLG Command Reference Manual

IPsec commands

IPsec commands are supported only when the switch is operating in FIPS mode. For more information
about FIPS mode, see Security Configuration Guide.

ah authentication-algorithm

Use ah authentication-algorithm to specify authentication algorithms for the AH protocol.
Use undo ah authentication-algorithm to remove all specified authentication algorithms for the AH
protocols.
Syntax
In non-FIPS mode:
ah authentication-algorithm { md5 | sha1 } *
undo ah authentication-algorithm
In FIPS mode:
ah authentication-algorithm sha1
undo ah authentication-algorithm
Default
AH does not use any authentication algorithm.
Views
IPsec transform set view
Predefined user roles
network-admin
Parameters
md5: Uses the HMAC-MD5 algorithm, which uses a 128-bit key.
sha1: Uses the HMAC-SHA1 algorithm, which uses a 160-bit key.
Usage guidelines
In non-FIPS mode, you can specify multiple AH authentication algorithms for one IPsec transform set, and
the algorithm specified earlier has a higher priority.
For a manual IPsec policy, the first specified AH authentication algorithm takes effect. To make sure
•
an IPsec tunnel can be established successfully, the IPsec transform sets specified at both ends of the
tunnel must have the same first AH authentication algorithm.
• For an IKE-based IPsec policy, the initiator sends the first AH authentication algorithm specified in
the IPsec transform set to the peer end during the negotiation phase, and the responder matches the
received algorithm against its local algorithms until a match is found. To ensure a successful IKE
negotiation, the IPsec transform sets specified at both ends of the tunnel must have at least one same
AH authentication algorithm.
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