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What does it mean when ASDM log shows no source port, destination IP or destination port?

I have a site to site IPSEC VPN tunnel. The tunnel establishes fine with no errors; phase 1 and phase 2 both complete. However, when a host on the remote end tries to connect to a host in the local end, the connection fails and all i see in the ASDM log is the source IP. No source port, destination IP or destination port.

 

The 'connection' is torn down immediately and nothing is show in the conn table.

 

I have the exact same VPN, ACL, NAT, etc. config on another appliance with the same remote and local nets, but just a different VPN peer (but same remote equipment). The tunnel and traffic work perfectly on one appliance, but i just constantly get these strange syslog entries and no connections on the other.

 

If anyone can explain why it shows like this, i would be greatly appreciative!

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