Inconsistent DNS availability
richard at yellowgoanna.com
Wed May 7 14:16:50 CST 2003
John Edwards writes:
> Hi Richard,
> Are you blocking port 53 TCP on a firewall, while allow port 53 UDP in?
7348 510K ACCEPT udp -- any any anywhere anywhere
7 368 ACCEPT tcp -- any any anywhere anywhere
> Directly querying for what you want generates a 499 byte reply because the
> adelaide.edu.au name servers have enough NS records to survive several
> simultaneous apocalypses, whereas querying the caching nameservers of Adam
> will only net you a condensed 110 bytes. 499 bytes is not enough to
> require TCP in the DNS response, but it might give you a hint as to where
> to look.
Hmm... Umm... Nope...
> Do you have any interfaces or aliases on your system that might have an IP
> address that is part of the university network?
I have a 192.168 which is not snat'd, only http proxied, though there is a
dns server there somewhere (I'd just have to find it)
> To get around your problem quickly, does it work if you simply put Adam's
> DNS servers in /etc/resolv.conf, remove 127.0.0.1, and restart the mail
Indeed it did... though it was remarkably slow in doing so...
Cheers for that -- though it doesnt' tell me why it happnenned in the first
place... :S ... :)
Yellow Goanna P/L
m: +61 412 827 805
e: richard at yellowgoanna.com
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