Help! All The Sudden Blocking Ports 2087, 2079, 2080, 2086, 2087 for ALL IPs?

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Junior Member
Posts: 6
Joined: 24 Aug 2016, 04:49

I've been running WHM/Cpanel on Servers For at least 12 years along with CSF/LFD. Yesterday all of the sudden the server wouldn't accept WHM connection on port 2087. I immediately tried bringing it up on my mobile phone to see if for some reason by connecting from my hotel the system had auto blocked the IP. Nope, was blocking external access to the port, not IP specific. Had made no config changes on the server WHATSOEVER.

For the heck of it I moved CSF to a different directory and re-installed. Works fine. But after a while (guessing couple hours or so) the csf.conf file is modified and those IP addresses listed in the subject of this thread are removed from the Allow TCP ports

Again I made no changes to anything on the server at any level (iptables, WHM settings, CSF/LFD settings)

It was the middle of the afternoon so a system update shouldn't have happened.

This is the poerts csf.conf file that csf installs with

TCP_IN = "20,21,22,25,53,80,110,143,443,465,587,993,995,2077,2078,2079,2080,2082,2083,2086,2087,2095,2096"

TCP_OUT = "20,21,22,25,37,43,53,80,110,113,443,587,873,993,995,2086,2087,2089,2703"

This is what the file change to by itself without me doing anything:

TCP_IN = "20,21,22,25,53,80,110,143,443,465,587,993,995,1027,2077,2078,2083,2095,2096,3306"

TCP_OUT = "20,22,21,25,37,43,53,80,110,113,443,587,873,993,995,1027,2089,2703,3306,2077,2078"

What could be modifying the port configuration?

I'm on WHM 78.0.13
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