I am working on creating a IPSEC VPN Tunnel between two buildings that are 300-400 yards away. This was up and running with no problems for a few months. Then all of sudden we lost communication. I tested communication to each device from a third party and had no issues establishing the connection. I have reset each device to factory defaults. updated all firmware but still unable to ping IP on remote site. The IPSEC tunnel is opened between building A and B but unable to ping any IP address either way.
Any ideas are welcome
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