I have a strange situation where I have a ASA and PIX 6.3 at my central site. I can bring the tunnel up from the main PIX site to the ASA but not the other way around.
It appears to fail at Phase 1 with MM_Wait_MSG6.
Any ideas, all IKE seems to match.
I also have a weird problem where the same ASA seems to drop the connection despite keep alives being set.
Session disconnected. Session Type: IPSecLAN2LAN, Duration: 4h:57m:58s, Bytes xmt: 150198468, Bytes rcv: 9714889, Reason: Lost Service
Not sure if the two problems are related. I have many many ASA working in this configuration without issue.