[Openswan Users] connection to CISCO 1720, NO_PROPOSAL_CHOSEN

Joachim Gruhn joachim.gruhn at snap.de
Thu Mar 11 13:04:14 CET 2004


hi,
I have problems to establish a VPN tunnel from a SuSE Linux 9 host with 
FreeS/Wan 1.99 installation to a CISCO 1720 VPN Gateway where the linux 
box is the initiator. The proposol payloads (4) initiating the QUICK 
MODE (I1) will not be accetpted by the CISCO 1720. The first two 
transform payloads offers ESP_AES encryption which are not supported by 
the 1720. The last two transform payloads offers ESP_3DES which should 
be accepted by the 1720, but did not appear in the trace of the CISCO 
Gateway. The sequence ends up with a notification payload 
"NO_PROPOSAL_CHOSEN" at the freeswan side.
If the CISCO VPN Gateway acts as the initiator, a connection can be 
established and everything seems fine.
It is a bug in freeswan? Is it possible to disable a specific encryption 
(ESP_AES) for a specific connection definition?
Any idea is welcome.

Regards
Joachim


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