dabogdan

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had a similar issue. I had to add dns forwarders to the firewall. Now it works. It used to for over a year or more without anything. strange

in Error code list for USG? Comment by dabogdan January 2023
Peter. I have a single public IP which always makes matters interesting. That is why I'm using port forwarding for the email server. but yes, it's a 192.168.x.x subnet. An extra rule for the server and a no snat option fixed it. now the inbound emails show the source IP address. thanks again..

in Port forwarding - wan IP is shown instead of source IP Comment by dabogdan June 2022
added an rule above the default rule for the email server only with no snat. that works perfectly. Thanks for the assistance!

in Port forwarding - wan IP is shown instead of source IP Comment by dabogdan June 2022
turning off snat appears to drop all traffic

in Port forwarding - wan IP is shown instead of source IP Comment by dabogdan June 2022
the email server is internal.

in Port forwarding - wan IP is shown instead of source IP Comment by dabogdan June 2022