Can I forward DNS request using TCP?

[Chris Buxton]

I suspect forwarding is not the best solution for you, but if you feel  
you must...

There is no way to configure BIND to send all queries to a forwarder  
over TCP instead of UDP. And the operator of that forwarder probably  
wouldn't appreciate it if you could.

If the UDP packets aren't arriving, check all the firewalls in between  
(and at both ends). Make sure you're sending the packets to a DNS  
server. Verify with the server's operator that this is OK.

Or, alternatively, forward somewhere else. opendns.com's forwarders,  
for example.

Chris Buxton
Professional Services
Men & Mice

On Jul 17, 2008, at 6:11 PM, igor wrote:

> I have configured a forward DNS server in Linux, unfortunately it
> seems that the UDP packets are being lost therefore my server is
> giving "service failure" to its clients.
>
> I haven't found a way to make the forward requests go via TCP over the
> forwarders.
>
> Can you please tell me if this is doable or not? Is there a parameter
> on named.conf or named.boot I need to change or do I need to get the
> named source and "hack it".
>
> Any information is greatly appreciated!
>
> IgoR
> Phoenix.
>