[Fedora-infrastructure-list] Hardware Trouble (?) on app1.fedora.phx.redhat.com
Luke Macken
lmacken at redhat.com
Mon Sep 11 19:15:28 UTC 2006
On Sun, Sep 10, 2006 at 08:49:13PM -0400, Jeffrey Tadlock wrote:
> Warren Togami wrote:
> > Both before and after the data center migration to a new rack and new
> > switch, we have occasionally been experiencing network trouble to
> > app1.fedora.phx.redhat.com.
> >
> > Since this happened both before and after the new switch, could this
> > perhaps be hardware trouble?
> >
> > Any opinions of what we should do about this? Perhaps...
> >
> > - More closely monitor, with ping logs over time?
>
> Closer monitoring would probably be good. Seeing what is happening from
> the console when these unusual events occur might also provide some
> insight as to what is really happening. From the IRC log it looks like
> lmacken was able to produce some "oddities" with an nmap scan of app1
> and trying to flush iptables?
I have experienced this issue with a couple of other machines in the
colo, although I cannot remember exactly which ones (proxy[1-4] iirc).
I have been successful in reproducing this issue by just `nmap app1`
from bastion, and also `sudo /sbin/iptables -F` on app1 itself.
I have yet to try these against app1 without any iptables chains loaded
(since I cannot flush them). I'm still trying to get the Dell Remote
Console switch stuff working so I can get into the KVM and flush them,
but I haven't had much time to play with it.
> The firewalls on these boxes have been a little unusual to say the least
> in the time I have worked on these boxes. Maybe just getting some of
> the Pyroman configs rolled out will clear some of this up.
I'm ready to deploy pyroman on the app servers at any time, but I have
been hesitating because I would like a safetynet just in case something
explodes (either through the KVM or the cyclade consoles (anyone have
the new information on this?)).
luke
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