I have a site-to-site vpn between ASA & PIX. Configuration are perfectly alright. But the problem is only when i initiate a traffic from PIX side the ASA side hosts respond. It is like 1 to 1 it response. i.e if PIX side host A initiatez a traffic to ASA side host A, it will only respond to PIX side host A & not to all other host. If other hosts has to respond from ASA side, all other hosts in PIX side should initiate. Not sure what could be the problem here. Any ideas?