Showing posts with label issues. Show all posts
Showing posts with label issues. Show all posts
Saturday, September 16, 2017
Ubuntu 12 04 new DNS and VPN issues
Ubuntu 12 04 new DNS and VPN issues
In Ubuntu 12.04 theres 2 major changes with regards to DNS resolving:
1. resolvconf is now used by default
2. a local resolver is now hardcoded into network manager and is used by default
This means that youll see nameserver 127.0.0.1 in your /etc/resolv.conf at all
times, while the real DNS config is managed by dnsmasq started by NetworkManager.
You can see the current DNS config in /run/nm-dns-dnsmasq.conf
There are numerous issues that this approach introduces. More info on the change and possible issues/solutions are here - http://www.stgraber.org/2012/02/24/dns-in-ubuntu-12-04/
My issue was that one of the VPN providers wasnt properly sending the search domain, so I couldnt access the servers by names on this network.
The easies solution is to add the DNS and search domains manually
1. resolvconf is now used by default
2. a local resolver is now hardcoded into network manager and is used by default
This means that youll see nameserver 127.0.0.1 in your /etc/resolv.conf at all
times, while the real DNS config is managed by dnsmasq started by NetworkManager.
You can see the current DNS config in /run/nm-dns-dnsmasq.conf
There are numerous issues that this approach introduces. More info on the change and possible issues/solutions are here - http://www.stgraber.org/2012/02/24/dns-in-ubuntu-12-04/
My issue was that one of the VPN providers wasnt properly sending the search domain, so I couldnt access the servers by names on this network.
The easies solution is to add the DNS and search domains manually
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