I have a 6500 with a FWSM also a sup720/WISM and a 48port sfp.
Problem is when I setup a vpn connectivity through the FWSM from the inside going to the outside the session is terminated. The fwsm show src protocol 50 not translated error msg.
We have full permission to go out and in with protcol 50 and 51 , esd and iskmp.
the error appears to be the pat setup
we have a public network (172.16) natted or PAT'ed to a single ip. when we set a static rule it works. I've seen ipsec-udp
to bypass this and sysopt , but neither of these are on the FWSM. If there is a Lead to some documentation that would solve this it would be most appreciated.