[strongSwan] Issue with SHA256_96

Andreas Steffen andreas.steffen at strongswan.org
Sat Dec 15 19:27:41 CET 2012

Hi Mohit,

why would you want to negotiate SHA256_96 with a newer
kernel if the standard is SHA256_128 and can simply
be configured with


IKE never supported SHA256_96, so your configuration
is not valid. Thus better use




On 15.12.2012 18:32, Mohit Sharma wrote:
> hi ,
> I have strongswan stack setup with the following hosts
> host a
> left=
> right=
> ike=aes128-sha256_96-modp2048!
> esp=aes128-sha256_96-modp2048!
> host b
> left=
> right=
> ike=aes128-sha256_96-modp2048!
> esp=aes128-sha256_96-modp2048!
> But there is a problem in phase 1 proposal selection,i have a linux
> kernel version newer than 2.6.33,but still both host cant negotiate on
> sha256_96 ,please tell me if iam configuring it correctly,seconldy if
> its correct to use sha256_96 with linux versions later than 2.6.33 plus
> how to negotiate on sha256_96 on the same kernels.
> --
> Best Regards
> Mohit
Andreas Steffen                         andreas.steffen at strongswan.org
strongSwan - the Linux VPN Solution!                www.strongswan.org
Institute for Internet Technologies and Applications
University of Applied Sciences Rapperswil
CH-8640 Rapperswil (Switzerland)

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