Custom DNS not working on 7.6.3


We have a RUT955 ( running 07.06.3 and are experiencing DNS issues.

From the RUT955 we can’t resolve On the RUT955, when we do a nslookup, it resolves successfully (see below).

root@RUT955:~# nslookup

Address 1:
*** Can’t find No answer

However, a ping towards does not (see below).

root@RUT955:~# ping
ping: bad address ‘’

We have 1 SIM inserted and 4G connectivity is working. We can resolve general hostnames like,, …, but we have configured a custom DNS configured on mob1s1a1 and this is also visible in an ifconfig.

When we manually update /etc/resolv.conf and update the nameserver from to, the RUT955 starts to resolve
After a reboot, this change is lost.

A LAN device connected to the RUT955 is also not able to resolve

Is there anything else we can check or update?


Ok, found the issue… Under Network>DNS - the option Rebind Protection needs to be set to OFF instead of ON (default).

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