How can I log how much bandwidth is being used by lookups?

[Matt Bostock]

Thanks for the advice :)

Matt :)
-- 
Banging your head against a wall uses 150 calories an hour.


"Simon Waters" <Simon at wretched.demon.co.uk> wrote in message
news:bveghq$qjv$1 at sf1.isc.org...
> Kevin Darcy wrote:
> >
> > When I say "rough idea", I mean that the "sending TCP message" numbers
> > don't include TCP overhead, such as ACKs, retransmissions, and so forth.
> The only time I've seen the zone transfers be a bandwidth hog was the
> old Microsoft NT DNS server which would retry a zone transfer
> immediately if it had bad data in it - BIND is better behaved in these
> situations. But then I haven't tried slaving relay blocking lists.
>
> I'm assuming this wouldn't include the SOA queries to get the zone
> serial, or any queries for the zone in question (although I guess they
> can be estimated from the stats).
>
> On Linux you have counters in IPTables which can be used to gather
> information on bandwidth, as I know a local LUG group member uses it for
> billing purposes at the ISP he runs (overflowing the counters was a
> problem at the time), although it could end up a lot more arcane than
> Kevin's approach it would probably be relatively easy to account all
> traffic to port 53 on the master. I dare say other packet logging would
> do the trick as well (tcpdump dst port 53 and host ...)
>
> In these days of incremental zone transfer there is no reason they
> should be very big unless the zone changes dramatically.
>
>
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