Recursive queries fail if query source port is not fixed

[Hans F. Nordhaug]

* Mark Andrews <Mark_Andrews at isc.org> [2008-08-14]:
> 
> 	Does "dig ns . @198.41.0.4" succeed when run from the box
> 	running the nameserver?

Yes.

I still don't understand why most recursive queries only works after
many, many tries - argh. Oh, I just tested doing one query, waiting 
30 seconds and then trying - success. Hm, maybe there is a time-out 
issue after all? 

And "dig porttest.dns-oarc.net txt" never seems to work ;-) Because it
changes all the time ...

Hans