[Openswan Users] Openswan cisco vpn client compatibility

[peter at krajci.sk]

Hello,
I am using Linux Openswan U2.6.37/K3.2.0-4-amd64 (netkey) as IPsec  
server. It is actual Openswan version from debian package. I want to  
ask if there is support for cisco vpn client. I am using version  
5.0.07.0440. I tried many configurations working with client Shrew  
soft vpn client or win7 native client, but I get error with cisco vpn  
client. From auth.log

Jul  9 11:59:47 IPsec pluto[19288]: packet from 192.168.110.73:61352:  
size (869) differs from size specified in ISAKMP HDR (853)

It is initial packet sent from host to Openswan server, and Openswan  
server do not respond. Firewall do not play any role because it is in  
same local network.
If there is no support for cisco vpn client. Is there some free ipsec  
solution compatible with cisco vpn client? I need it for simulation of  
one issue.

Thank you.
Peter Krajci