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URPF issue on ASA Firewall

benolyndav
Level 4
Level 4

Hi

Hope someone out there knows a solution, here goes

Steps

1. user opens a connection which travels across the site to site and hits a server at 3rd party

2.the server then needs to reach inet to  servers to authenticate the user

3. so back across the site to site and out to inet and take return path back and authenticate user.

Im seeing URPF drops in the logs is there any way i can get round this I think im seeing the URPF drops because the traffic is wanting to travers the inside interface but the ASA dosent route traffic to this source through this interface it knows the source needs to be routed across the VPN.????

 

diagram attached

 

Thanks

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