On 29 Mar 00, at 3:30, [EMAIL PROTECTED] wrote:
> Message-Id: 1993_kb2shu
> From: kb2shu@kb2shu.#sca.ca.usa.noam
> To: [EMAIL PROTECTED]
>
>
> Bob Nielsen wrote:
>
> > > Just what is port 53 and why does my second Linux box want to send
> > > frames to addresses using this port number.
> >
> >
> > $ grep 53 /etc/services
> > domain 53/tcp nameserver # name-domain server
> > domain 53/udp nameserver
> >
> > I expect that PC2 is trying to resolve something. Are the frames
> > addressed to the DNS defined in /etc/resolv.conf?
>
> Hi Bob,
>
> That's what I don't understand, the frames are addressed to servers
> other than what is listed in resolv.conf. In fact it is sending these
> DNS queries to several different DNS none of which are listed in
> resolv.conf.
>
> The DNS queries are UDP frames and are being sent constantly. These
> frames are only generated by PC2, my main PC (PC1) is behaving
> normally. Since my link to the gateway is via RF this is wasting a lot
> of bandwidth, I just assume turn it off if I can. Thanks in advance
> for your advice!
>
>
> 73 for now de Paul.
> kb2shu@kb2shu.#sca.ca.usa.noam
> [EMAIL PROTECTED]
> [EMAIL PROTECTED]
> www.moonlink.net/~paul
>
The domain name resolving process is not a single stage process.
If a domain name is not directly known to a DSN server, it cannot
return the address associated with that name. What it does return
instead is the address of a DNS that should know how to find the
correct answer to the query, and the requestor is then expected to
send a new DNS request to that new server. This process is then
repeated for server after server, each time getting closer to one that
can finally answer the query.
this is probably what you are seeing over your network.
If the radio gateway is the only route from PC2 to the rest of the
internet, then there is no way to stop the process without breaking
most name resolving on PC2.
If PC2 has any other route to the internet, then you need to fix your
routing tables. Alter the routing so that only packets addressed to
the computers on the other side of the gateway are sent through
the RF link, with the default route being set to send everything else
through the alternate link.
