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Site to Site VPN Tunnel is up, but no traffic pass through

L2 Linker

Hi all.  I am trying to setup a site to site VPN tunnel with one of our customer.  I've got the dedicated layer 3 zone, tunnel interface, IKE Gateway, Virtual Router etc. configured per the Palo Alto admin guide.  In the "IPSec Tunnels" section, it shows the VPN tunnel is up.  However, I cannot access any of the server located at the customer's environment. 

In the Traffic monitor tab, it shows the traffic is sending over to the customer's network, yet nothing is returning from them (Bytes Send = xxx; Bytes Received = 0; Packet Send = xxx, Packet Received = 0). 

Am I missing something here?

Thank you. 


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