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Thread: UFW (GUFW) Blocking DNS

  1. #1
    Join Date
    Jun 2012
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    Isaan (the REAL Thailand)
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    172
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    Ubuntu 10.04 Lucid Lynx

    UFW (GUFW) Blocking DNS

    Just setup GUFW Rules: outgoing ALLOW , incoming ALLOW 22, 25/tcp, 80, 110, LIMIT ssh/tcp. This is a server. I'll probably change port for ssh and close 22 later. When firewall is on, I can ping (from LAN client) to the gateway, an adsl modem router 192.168.1.1 but "cannot find host google.com" when I ping that. With firewall off I can ping it. What am I missing?

  2. #2
    Join Date
    Jun 2009
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    Xubuntu 13.04 Raring Ringtail

    Re: UFW (GUFW) Blocking DNS

    port 53 is DNS UDP IIRC
    for some reason enabling port 80 udp made it work for me

    note i was using the linux box as a router and it was unable to assign the addresses
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  3. #3
    Join Date
    Jun 2012
    Location
    Isaan (the REAL Thailand)
    Beans
    172
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: UFW (GUFW) Blocking DNS

    It was pointed out to me that ufw is problematic at times in mysterious ways, and that I didn't really need a firewall as the server is behind an enterprise router with QOS. Apt-get remove ufw ..problems solved!

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