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I have a Sophos XG with SFOS 17.5.8 MR-8, and everything is by default.
I have one nat rule to all hosts/ports to go out to the wan.
My issue is that I have a internal host, an IOT device, that needs to communicate with port 143 on the wan and its not able to, I see the package being accepted on the logs but no reply from target. Checked With tcpdump on other host trying telnet to the same target and no replies are getting in.
Tested without Sophos and it works. I can't see any traffic being denied anywhere.
How can I find in which layer it's being rejected?
In reply to Keyur:
A late through, are you using port 143 in your XG mail notifications?
In reply to rfcat_vk:
Notifications are not using the built-in server, I'm using an external mail server.
In reply to Telmo Reis:
And suddenly it works...
Not sure what happened, did not do any changes but now it's ok.