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TCP Port 53 CSF wont open?

Discussion in 'Bind/DNS/Nameserver' started by Justin Conte, Dec 16, 2017.

  1. Justin Conte

    Justin Conte Registered

    Dec 16, 2017
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    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 :)
  2. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

    Apr 11, 2011
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    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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