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L2L VPN Tunnel with NAT on one side working only in one direction.

hemantpatel
Level 1
Level 1

Site A is hosting a host running SMTP services using port 9999. The outside IP address of site-A (ASA5505) is A.A.A.A and port 9999 on outside interface (A.A.A.A) has been statically natted to private ip 192.168.100.100 of the SMTP host.
Site-B is trying to reach site-A using its public ip (A.A.A.A) on port 9999. Both Phase1 and Phase2 gets established but Site-B is not able to reach Site-A (not able to ping, telnet,ssh,smtp). Zero encaps/decaps on site-A. Howerver, site-A reaches site-B using its private ip (192.168.200.200) on port 9999 without any issue.

Is there any issue using outside interface of ASA with NATTED port for VPN traffic?

1 Reply 1

If you are setting up a site-to-site VPN,why are you trying to connect to  the public address of the smtp server?

if you want to connect to the public address then you would not go through a VPN tunnel

please share relevant configurations

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