TCP Port 53 CSF wont open?

Justin Conte

• December 16, 2017 21:14

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 :)

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  cPanelMichael

  • December 18, 2017 14:28

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

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