Select the “Use IP Address” option and specify an available static public IP from your ISP that you have not used in a NAT policy yet. The translated Interface is the outside interface. Once in the firewall section, highlight “NAT Rules”ģ.) Click on the “Add” option on the right side to add a new static NAT rule and choose “add new static NAT rule”Ĥ.) Original Interface is “inside” with a source that is the internal IP of the VoIP System. Click on “Configuration” at the top, then click on “Firewall” down on the bottom menu. So, let’s make it simple:Ģ.) First, we need to ensure a NAT policy exists for a Public IP to NAT to the internal IP of the VoIP system / server.
Route inside 10.23.5.0 255.255.255.0 10.20.40.So you have a client that has a VoIP system? They have remote users that need to be able to access the phone system from Internet / VPN? How do you configure an ASA to work with this type of a scenario? Or, even better, why isn’t your ASA configuration working to allow this? If you Google this and look at forums, you will find overly-complicated, convoluted tech-talk and people posting their specific Cisco configs for others to look through and help them with their specific issues as opposed to an easy-to-understand generic formula for how to accomplish this relatively common scenario. Nat (inside) 0 access-list inside_nat0_outboundĪccess-group from-out in interface outside Icmp unreachable rate-limit 1 burst-size 1 Same-security-traffic permit intra-interfaceĪccess-list outside_access_in extended permit icmp any anyĪccess-list DefaultRAGroup_splitTunnel Acl standard permit 10.20.0.0 255.255.0.0Īccess-list inside_nat0_outbound extended permit ip 10.20.0.0 255.255.0.0 192.168.55.0 255.255.255.128 Same-security-traffic permit inter-interface I utilized the wizard, and attempt to connect with MS vpn client and I get " Error 789: The L2TP connection attempt failed because the security layer encountered a processing error during inital negotiations with the remote computer " I checked the log on the asa and get these lines when trying to connectĤ 06:56:00 713903 Group = DefaultRAGroup, IP = x.x.x.x, Freeing previously allocated memory for authorization-dn-attribute sĦ 06:56:00 113009 AAA retrieved default group policy (DefaultRAGroup) for user = DefaultRAGroupģ 06:56:00 713206 Group = DefaultRAGroup, IP = x.x.x.x, Tunnel Rejected: Conflicting protocols specified by tunnel-group and group-policyģ 06:56:00 713902 Group = DefaultRAGroup, IP = x.x.x.x, Removing peer from peer table failed, no match!Ĥ 06:56:00 713903 Group = DefaultRAGroup, IP = x.x.x.x, Error: Unable to remove PeerTblEntryĥ 06:56:00 713904 IP = x.x.x.x, Received encrypted packet with no matching SA, dropping I am attempting to setup a vpn on a cisco asa 5505.