network problem

[OutBackDingo]

whats redirecting the requests to the apache server? is it on piublic or 
private ip block ? whats it set to listen on IP wise ? what about a changed 
netmask ?

On Saturday 16 August 2008 15:55:11 Robin Becker wrote:
> After a recent change of ISP and hence our external IP address I find
> that our FreeBSD 6.1 apache http server appears to be invisible from
> outside our site. Port 80 requests just seem to hang whether done via a
> dns lookup or using the ip address. Checking the logs seems to indicate
> that no requests now arrive, but that we have seen some external
> requests since the ISP changed.
>
> The https/sshd/mysql etc servers are still visible externally and the
> http server is visible on its local address and if you visit the
> external address from inside the network.
>
> I suspect that either I've still got some misconfiguration on the
> server, gateway or or dns(although this seems less likely).
>
> Alternatively the ISP might have some other block in place.
>
> I've looked for the old IP address in /etc and found no usages the
> gateway appears to be correctly set up.
>
> What tests can I do internally/externally to see what happens to my port
> 80 packets?