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ASA 5505 VPN Issue

allenk1052
Level 1
Level 1

Hello all,

I have a client , with a ASA 5505.

Trying to configure VPN

Doing so, I get the following error

Connection for udp src outside:192.168.150.100 dst inside:192.168.2.2 denied due to NAT reverse path failure. 

Wondering if anyone has any 1st steps to try ?

Any information appreciated

Thanks all, and Best Regards,

Allen

3 Replies 3

Marvin Rhoads
Hall of Fame
Hall of Fame

We need some more information. Can you share the ASA configuration, the type of VPN (IPsec or SSL) and confirm that the client is trying to connect via the outside interface?

The syslog message you shared is not by itself VPN-related but rather specific to NAT. You will get it if you try to connect to an address that is allowed by ACL but where the opposite direction of the  traffic flow would be NATted.

Aditya Ganjoo
Cisco Employee
Cisco Employee

Hi,

It seems you may have a conflicting NAT statement which can trigger this error.

If possible share the packet tracer for this traffic.

As suggested by Marvin please share the information requested by him as well.

Regards,

Aditya

Please rate helpful and mark correct answers

Shankar Murali
Level 1
Level 1

From the available information i believe it is Lan-Lan IPSec vpn. In that case can you check the status of phase1 and phase2 by using the commands "sh cryp isakmp sa" and "sh cryp ipsec sa".

-Shankar