ASA5510-Regular translation creation failed for protocol 50

Unanswered Question
Jan 24th, 2008
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I have ASA5510 and having problems while connecting to remote VPN using cisco VPN client.

I will be able to get connect to VPN but not able to ping the remote network IP's and when I look into ASA logs I get the error "regular translation creation failed for protocol 50 "

This error message appears when I try to connect thro' PAT IP.

If i do NAT and configure access-list to allow

udp isakmp

tcp eq 10000

udp eq 4500


it works fine.

As i see some one posted to configure to allow NAT-traversal & inspect ipsec-pass-thru command still its not working.

Also I tried configuring the TAC case collection K85809210

but no luck

Any body has any solution to this problem



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acomiskey Thu, 01/24/2008 - 06:27
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If I understand correctly, you are connecting to a vpn through your 5510? Or are you terminating the vpn at your 5510?

I think you are connecting through the 5510, in which case the REMOTE firewall must have nat-t enabled.

ckuriyar74 Thu, 01/24/2008 - 23:21
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yes, iam connecting to a customer VPN through my 5510.


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