CentOS BIND DNS Not Responding To DNS Queries

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KB ID 0000906 

Problem

While moving my DNS records from my old hosting company, I finally got round to pointing my domain name server records at my own server. I then saw my web traffic nose dive! Some troubleshooting steps later I realised I could not connect to my server on TCP port 53 (use an online port scanner to test yours).

Solution

Allow Access to DNS BIND From Remote Clients

1. Firstly let’s make sure that the firewall is not blocking DNS (Note: I’m using iptables).

[box]iptables -A INPUT -p udp -m state –state NEW –dport 53 -j ACCEPT
iptables -A INPUT -p tcp -m state –state NEW –dport 53 -j ACCEPT
service iptables save
service iptables restart[/box]

2. Still mine refused to work! I had to edit the named.conf file

[box] nano /etc/named.conf[/box]

3. Mine was set to only respond to 127.0.0.1, and only return localhost.

Before

After

4. Then restart the DNSBIND service.

[box] service named restart[/box]

Related Articles, References, Credits, or External Links

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