ConfigServer Community Forum

Hi there,
I am using CSF v14.16 with WHM v104.0.5 on a Machine with CloudLinux v7.9.0.

I am trying to open an additional port 2304, by adding a record for the same in CSF's Firewall Configuration interface
Allow incoming TCP ports
TCP_IN =
20,21,22,25,53,80,110,143,443,465,587,993,995,2077,2078,2079,2080,2082,2083,2086,2087,2095,2096,8443,2304

and have restarted the csf server several times after that, but the port still remains closed/unavailable when I check using "View Listing Port" option or using an online tool, which is available here: https://www.yougetsignal.com/tools/open-ports/

I will share the IP address of my server if required as well.
Thanks,
Tanveer

You could try to disable CSF and then check the port.
This additional step could help diagnose if the port opening/closing is due to CSF.

I did try that as well and surprisingly, it makes no difference.

If enabling/disabling CSF does not have any difference, then the technical issue you have raised may not have a direct correlation with the CSF software.

Of course, there are system admin experts here who can definitely help you but are you fully aware that you have posted your issue:
i. with the title/subject: CSF is not opening a Port 2304
ii. in this forum board called " ConfigServer Security & Firewall > General Discussion (csf) "?

Or it could be that the IP trying to access port 2304 is already blocked by cPHulk or CSF.

Check first if the IP is no blocked by those and then try again to access port 2304.