Port Opening Issue on CloudLinux and cPanel Server After Switching from CSF to Imunify360
Recently, I changed the firewall on my server with CloudLinux and cPanel, switching from CSF to Imunify360. Since then, I have noticed that I cannot open ports on my server. I have verified the iptables and nftables rules, and both are being created correctly.
After some research, I found that it is recommended to use only one service for the rules, either iptables or nftables. I disabled iptables and left only nftables, but the problem persists: the port does not open on my server.
I also tried deleting and reloading the nftables rules, but the port still does not open.
Can you please advise me on how to fix this so that my system functions normally?
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Hey there! Can you let me know how you are currently trying to open the ports that isn't working? I haven't heard any issues about this on my end so knowing the full process you're taking will be helpful for troubleshooting.
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I am using the imunify360 interface in the firewall section, there is the function of all ports open or close all ports except a certain list, I am using it like this
strangely in the early hours of this morning I had a problem with the server, it is possible that is some update or something but I had knocked down the service named, the point is that when I managed to lift it rebuilding the file, somehow started to work all normal including the opening of port by imunify360, so I think it could be a bug.
now everything is working as it should be, I will be checking to see what happened... I will be informing by this means in case someone has the same thing happen to have context that someone already happened to someone else.0 -
I'm glad to hear things are working well now. It would likely be best to create a ticket if you see this happen again, as I'm not aware of any current issues.
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I have not had any errors happen when users change firewall for example when they put csf they use iptables for the rules, therefore the nft is disabled searching the internet with segui that sometimes it can be an inheritance problem because of the iptables rules so when i remove csf i also disable iptables and clean the rules to use nft with the imunify rules as well as any other rules i use.
Is it possible that it is some kind of bug? what do you think?
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I'm honestly not sure - a ticket would be the best path forward so things could be tested directly on that machine.
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