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Asymmetric NAT

Rafael Jimenez
Level 4
Level 4

I need help with a ASA5505-SEC-BUN-k9 configuration.

the version is 8.4.

its a simple setup , I have a outside with a public ip, a inside with a 172.16.1.0 network.

I setup the vpn client with ipsec and anyconnect. in both cases im getting the following error :

# show log asdm

5|Sep 05 2012 21:54:38|305013: Asymmetric NAT rules matched for forward and reverse flows; Connection for udp src isp1:172.16.1.46/138(LOCAL\userx) dst inside:172.16.1.255/138 denied due to NAT reverse path failure

6|Sep 05 2012 21:54:39|302015: Built inbound UDP connection 3212 for isp1:172.16.1.46/53100 (172.16.1.46/53100)(LOCAL\userx) to isp1:190.147.134.215/53 (190.147.134.215/53) (userx)

6|Sep 05 2012 21: 5|Sep 05 2012 21:54:38|305013: Asymmetric NAT rules matched for forward and reverse flows; Connection for udp src isp1:172.16.1.46/138(LOCAL\userx) dst inside:172.16.1.255/138 denied due to NAT reverse path failure
6|Sep 05 2012 21:54:39|302015: Built inbound UDP connection 3212 for isp1:172.16.1.46/53100 (172.16.1.46/53100)(LOCAL\userx) to isp1:190.147.134.215/53 (190.147.134.215/53) (userx)

Thanks.

1 Reply 1

Julio Carvajal
VIP Alumni
VIP Alumni

Hello Rafael,

If you need more assistance from us you will need to post the entire config

Regards

Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC
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