I have a network configuration with two firewalls. ASA5510 is the first level of security and then Microsoft ISA is the next level of security before traffic enters the LAN. The problem I am faced with is that PPTP works inbound to the LAN but would not work on the outbound. I tried turning off the inspection but this doesn't help. I temporary replaced the ASA5510 with a 2821 router configured as a firewall and this works perfectly. Can anyone tell me why the ASA5510 would not allow the outbound PPTP connection. It works ok if the ASA5510 is standalone.
I have this problem too.