Wierd IDE/IP Masq issues

Paul Bryan pa_bryan at yahoo.co.uk
Sat Nov 2 23:43:34 EST 2002

Hash: SHA1

On Sat, 2 Nov 2002 22:47, Geoff Smith wrote:
> Hi all,
> I'm getting some really wierd behaviour on my network at home.
> My desktop machine acts as a gateway for the rest of the machines on the
> network, just doing basic IP Masquerading using iptables. Whenever I'm
> either watching a DVD or burning cds on my desktop, my desktop seems to
> stop forwarding port 80 to other machines on the network. Services like
> pop email work fine. The moment the cd finishes burning or I turn off
> the DVD, everything is back to normal.
> I'm running Red Hat 8 on my desktop. My burner and DVD are both ide
> drives. DVD is /dev/hdc, burner is /dev/hde.
> Has anyone seen or heard of this sort of thing before?
> Cheers,
> Geoff

Sounds a little mysterious. What are you using to play DVD's / burning CD's  
with? Have you had a look at netstat when your having the problems, and when 
your not? That might tell you whether something is listening to port 80 

Try to enable logging on iptables and you may see where the packets are 
disappearing to.

At the very least, you should be able to eliminate some possiblities. 

Also, Have you thought that it may be a coincidence with the CD/DVD issue 
(ie. you've only noticed the problem while doing these things, but it happens 
at other time as well)?

Hope some of that helps.


- -- 
Paul Bryan
E-Mail: pa_bryan at yahoo.co.uk
It's no use crying over spilt milk -- it only makes it salty for the cat.
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