One of our servers new one decided to really annoy us by sending us [ipcheck] Problem with DNS setup Emails!
The Email read as…
[ipcheck] Problem with DNS setup on hostname.domainname.com
IMPORTANT: Do not ignore this email.
Your hostname (hostname.domainname.com) could not be resolved to an IP
address. This means that /etc/hosts is not set up correctly, and/or
there is no dns entry for box.smwebserver.info. Please be sure that
the contents of /etc/hosts are configured correctly, and also that
there is a correct ‘A’ entry for the domain in the zone file.
Some or all of these problems can be caused by /etc/resolv.conf
being setup incorrectly. Please check that file if you believe
everything else is correct.
You may be able to automatically correct this problem by using the
‘Add an A entry for your hostname’ option under ‘Dns Functions’ in
your Web Host Manager.
After trying to figure what the problem was and why certain people around the world i’d say maybe 3% could not access our website the fix was the following (useful if anyone else is having the same problem)
Login to SSH
Type:
cd /etc
pico resolv.conf
Ensure that the contents of it is the following (obviously replace yourdomainane.ext with your own)
search yourdomainame.ext domain yourdomainane.ext nameserver 8.8.4.4 nameserver 8.8.8.8 nameserver 4.2.2.1 nameserver 4.2.2.2 nameserver 4.2.2.3 nameserver 4.2.2.4 Save this Ctrl + o Then open your hosts file pico hosts (this should be in etc directory) Ensure contents are like the following: # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1 localhost.localdomain localhost xx.xx.xx.xx hostname.domainanme host xx - Enter your MAIN Server IP Here Replace Hostname with hostname for example server.mpadc.com server server being the host again save then run /scripts/ipcheck Hopefully you should not get any more error messages!
