Cisco ASA 5500 – VPN Works in One Direction
KB ID 0000759 Problem The title of this article can cover a multitude of possible causes, however I recently had a strange problem where a client with a remote site protected by an ASA5505 had a VPN tunnel connected to their main site which had an ASA5510. The tunnel established at phase 1, and phase 2, the main site could talk to the remote site, but the remote site refused to talk back to the main site. Update 23/04/19: Seen again...