[CentOS] A bridge problem

[Marcelo Roccasalva]

On Mon, Jun 13, 2011 at 19:30, Ljubomir Ljubojevic <office at plnet.rs> wrote:
>
> m.roth at 5-cent.us wrote:
> > Les Mikesell wrote:
> >> On 6/13/2011 1:02 PM, m.roth at 5-cent.us wrote:
> >>> We just went to replace the bridge/firewall services one one server with
> >>> the same on another. It's pretty simple, and I literally cloned (w/
> >>> rsync) a third server that does this onto the one that will be the new
> >>> one.Then
> >>> copied the /etc/sysconfig/iptables from the one being replaced, and
> >>> brought it up this morning.
> >>>
> >>> Nope. We had to put everything back the way it was.
> >>>
> >>> The new one sees the two or three servers behind the firewall, and we
> >>> can ping them, from the new box. On one, we see IPP broadcasts; in fact,
> >>> we
> >>> see lots of broadcast packets using tcpdump. From outside, though, you
> >>> can't see the servers. Trying to ping them, they see nothing. It seems
> >>> to be the case that tcp and icmp packets are blocked, and we can't figure
> >>> out why.

Maybe some router or switch has your old mac address forced (or kind
of static). Can you reboot them? (or contact your ISP to know for
sure?)

--
Marcelo

"¿No será acaso que ésta vida moderna está teniendo más de moderna que
de vida?" (Mafalda)