udp vs tcp query

WBrown at e1b.org WBrown at e1b.org
Mon Oct 24 13:20:25 UTC 2011

Kevin wrote on 10/22/2011 11:42:08 PM:

> > remote server is rbldnsd with is not supporting tcp, how to solve this 
> You have a badly broken DNS if it does not support TCP. You need to
> fix this. Anything else is a band-aid that will just keep breaking
> things.

If it is a general purpose DNS server running rbldnsd, then yes, it is 
broken.  If it is simply serving up DNS based blacklists, rbldnsd is a 
reasonable choice.  It should only be getting A requests (Are any RBLs 
doing IPv6?) so any traffic should easily fit in a UDP packet. 

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