Apache not responding to web requests after ISP change

First, let me start by stating that I am by no means an apache or
linux expert.

I was contracted to move a school from one ISP to another. There T1
service provider was discontinuing service, so they went with Optimum
Business with a single static IP.

Their firewall is a Netscreen 25, with outside, inside and DMZ
networks.

>From the outside SMTP (25) and SSH (22) work to the linux box no
problem, as well as seeing inbound HTTP (80) packets via TCPDUMP. The
box just doesnt send an ACK to any port 80 packets it encounters from
the outside (untrusted) interface.

Requests from the internal (trusted) network are responded to with no
issue.

There have not been ANY changes to the linux box. The only thing that
has changed is the external IP address. The approriate DNS changes
have also been made, and mail is also flowing through this box with no
problems. It is relaying for the internal MS Exchange server.

On the firewall a VIP is setup, redirecting port 80, 25 and 22 to this
servers IP of 192.168.1.3. Everything works excepts 80, and whats
killing me is that I can see the packets pass through the firewall,
AND see them on the box itself via TCP DUMP, AND SERVICES ARE
WORKING!.

My question is; could there be something specific to APACHE that may
be causing this?

Thanks!

Re: Apache not responding to web requests after ISP change

Hi jalbert 5150,
if all surrounding environment "should look identical" to apache, check the
setup of the virtual http servers. There is a bug in yast that often
switches the identification of the virtual domains from "by http headers"
back to "by ip-adress". So if all your virt servers run on the same ip
adress, apache lets answer the first in the list, or the default server.

check the named.conf, if the listen-on and forwarders are set correctly.

greetings from germany
chris


schrieb im Newsbeitrag
news:1187577085.621650.319230@w3g2000hsg.googlegroups.com...
> First, let me start by stating that I am by no means an apache or
> linux expert.
>
> I was contracted to move a school from one ISP to another. There T1
> service provider was discontinuing service, so they went with Optimum
> Business with a single static IP.
>
> Their firewall is a Netscreen 25, with outside, inside and DMZ
> networks.
>
>>From the outside SMTP (25) and SSH (22) work to the linux box no
> problem, as well as seeing inbound HTTP (80) packets via TCPDUMP. The
> box just doesnt send an ACK to any port 80 packets it encounters from
> the outside (untrusted) interface.
>
> Requests from the internal (trusted) network are responded to with no
> issue.
>
> There have not been ANY changes to the linux box. The only thing that
> has changed is the external IP address. The approriate DNS changes
> have also been made, and mail is also flowing through this box with no
> problems. It is relaying for the internal MS Exchange server.
>
> On the firewall a VIP is setup, redirecting port 80, 25 and 22 to this
> servers IP of 192.168.1.3. Everything works excepts 80, and whats
> killing me is that I can see the packets pass through the firewall,
> AND see them on the box itself via TCP DUMP, AND SERVICES ARE
> WORKING!.
>
> My question is; could there be something specific to APACHE that may
> be causing this?
>
> Thanks!
>