Edwin Davidson wrote:
>
> >>Is 53/udp the _source_ or _destination_ port?
> destination_ port
>
> >>If 53/udp is the _destination_ port, then this has nothing to do with
> >>queries timing out or anything like that.
>
> Maybe my understanding of UDP DNS is incorrect. Doesn't the request
> go to the DNS server as a UDP QUERY, then a seperate UDP packet is
> sent from the DNS server back to the requestor?
It generally would look like this from the network and transport layers,
client.ip.address:ephermeral_port -> server.ip.address:53
server.ip.address:53 -> client.ip.address:ephermeral_port
The first packet would be the query and the second is the response. So,
if the response took too long, it would have a destination of
"ephemeral_port" and a source of 53 in the logs.
--
Crist J. Clark crist.clark AT globalstar DOT com
Globalstar Communications (408) 933-4387
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