Hi Cathy,

> > are you 100% sure that this isn't some hidden
> > arp table flushing / router not routing issue?
> 
> I had similar problems (similarly affecting only the vserver IPs, not the 
> master server) that coincided with a router upgrade in the data center.  I 
> second Herbert's suggestion to check the router. :)  HTH.

I will, but I definitely observed repeated incoming ARP requests for an IP
that I thought was configured on the server, although I neglected to
capture evidence. The addresses had not previously been assigned, so I
don't think there could be an ARP table entry to flush, and having 
restarted the vservers it once again became possible to access them 
without any changes to the firewall.

I will investigate further when I can afford potential downtime, 
and capture a tcpdump and the output of "ip link show", "ip route show" 
and "arp -n" to prove that the machine is not responding to ARPs. Is there 
anything else I should capture?

Is it possible that "vserver X stop" does not always take down the right 
interface?

Cheers, Chris.
-- 
_  __ __     _
 / __/ / ,__(_)_  | Chris Wilson -- UNIX Firewall Lead Developer |
/ (_  ,\/ _/ /_ \ | NetServers.co.uk http://www.netservers.co.uk |
\__/_/_/_//_/___/ | 21 Signet Court, Cambridge, UK. 01223 576516 |

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