Justin Conte

Registered
Dec 16, 2017
1
0
1
Thailand
cPanel Access Level
Root Administrator
Hi Everyone, first post... (and yes I searched first, extensively)

Have obviously fully updated dedicated cpanel server with CSF running...

UDP Port 53 works for DNS IN/OUT no problems, but TCP:53 doesn't...

I went through CSF IPv4 and IPv6 and noted the "query-source port 53;" needs to go in /etc/named.conf in { options } - Which I did.
I changed CSF to a static firewall (0 LF-SPI)

Checked with datacentre and they have no blocking to that port for my IP's (if I specifically ask they would block)

I have tried everything including disabling CSF (testing mode) and manually forcing IPv4 (option -4) and so on..

Restarting named (bind) each time...

What am I doing wrong, I kind of probably have the solution right in front of me but have been at it too long and have lost it... lol

Thanks for any help in advance :)
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,884
2,245
463
Hello,

Can you let us know the specific method you are using to verify that TCP connections over port 53 are blocked?

Thank you.