Here is a good link to do this:
Now, couple of days back , I setup dnsmasq in NetworkManager but was astonished to see that there was no dnsmasq running. I checked with dig and saw that there was no response from localhost for dns queries. Checked “ps -eaf|grep dns” and found that there was no dnsmasq running. I knew that once you mention “dns=dnsmasq” in the NetworkManager then it should start up but that was not happening. And then I checked audit log, found that some permissions were denied by SELinux.
First check if dnsmasq is indeed having issues because of SELinux:
grep -C 5 sealert /var/log/messages
If you do see something then time to fix it.
grep dnsmasq /var/log/audit/audit.log audit2allow -M mypol && semodule -i mypol.pp systemctl restart NetworkManager
And with this, you should be done, though you might have to repeat this multiple times.
Well if you have not heard about dnsmasq:
Dnsmasq is lightweight, easy to configure DNS forwarder and DHCP server.
It is designed to provide DNS and, optionally, DHCP, to a small network.
It can serve the names of local machines which are not in the global
DNS. The DHCP server integrates with the DNS server and allows machines
with DHCP-allocated addresses to appear in the DNS with names configured
either in each host or in a central configuration file. Dnsmasq supports
static and dynamic DHCP leases and BOOTP for network booting of diskless
and for the installation :
sudo yum install dnsmasq
So, now that it is installed, all you need to do is add the following in file: /etc/NetworkManager/NetworkManager.conf
in the main section. Restart your network manager using sysctl and you should see that command:
should show result like below:
google.com. 185 IN A 126.96.36.199
google.com. 185 IN A 188.8.131.52
google.com. 185 IN A 184.108.40.206
google.com. 185 IN A 220.127.116.11
;; Query time: 50 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon Jan 14 17:16:39 2013
;; MSG SIZE rcvd: 215
If it does not, then you might want to add a dispatcher to Network Manager that adds localhost to your “/etc/resolv.conf” file. And here is the name of the file – /etc/NetworkManager/dispatcher.d/localhost-prepend and the contents
#!/bin/bash # Prepend localhost to resolv.conf for dnsmasq if [[ ! $(grep 127.0.0.1 /etc/resolv.conf) ]]; then sed -i '1s|^|nameserver 127.0.0.1n|' /etc/resolv.conf fi
Thats all there is to it 🙂