HELP! - I can't route with SP1

I installed SP1 last night, and things haven't gone well.

My system: I have a small network in my home, with a W2k3 PC as the gateway
(running RRAS, with basic firewall & NAT), and another w2k3 pc as a
webserver (runnng IIS) (plus a couple more, XP, W2k and Linux but they don't
figure into this).

I installed SP1 on the gateway machine. Afterwards, the PC functioned OK,
and it was properly routing outbound WWW traffic, so I can surf the web from
any machine.

However, since SP1 was installed, that machine is refusing to route INBOUND
www traffic, so no one can see my websites.

The PC receives traffic on 8 different IP addresses, and routes it to three
different machines on the network.
(xxx.xxx.39.153 & xxx.xxx.48.209 -> xxx.xxx.48.215)

If I activate IIS on the gateway, it will open port 80, and serves pages
from that machine on the xxx.xxx.39.153 ip address, but noting on the
xxx.xxx.48.2xx address gets sent to the other machines.

All this ws working fine prior to installed SP1.

Can anyone help me??

I would check the NAT settings first. For more and other information, go to http://howtonetworking.com.

Don't send e-mail or reply to me except you need consulting services. Posting on MS newsgroup will benefit all readers and you may get more help.

Bob Lin, MS-MVP, MCSE & CNE
How to Setup Windows, Network, Remote Access on http://www.HowToNetworking.com
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
This posting is provided "AS IS" with no warranties.
I recommend Brinkster for web hosting!

"James Curran" <(E-Mail Removed)> wrote in message news:(E-Mail Removed)...
I installed SP1 last night, and things haven't gone well.

My system: I have a small network in my home, with a W2k3 PC as the gateway
(running RRAS, with basic firewall & NAT), and another w2k3 pc as a
webserver (runnng IIS) (plus a couple more, XP, W2k and Linux but they don't
figure into this).

I installed SP1 on the gateway machine. Afterwards, the PC functioned OK,
and it was properly routing outbound WWW traffic, so I can surf the web from
any machine.

However, since SP1 was installed, that machine is refusing to route INBOUND
www traffic, so no one can see my websites.

The PC receives traffic on 8 different IP addresses, and routes it to three
different machines on the network.
(xxx.xxx.39.153 & xxx.xxx.48.209 -> xxx.xxx.48.215)

If I activate IIS on the gateway, it will open port 80, and serves pages
from that machine on the xxx.xxx.39.153 ip address, but noting on the
xxx.xxx.48.2xx address gets sent to the other machines.

All this ws working fine prior to installed SP1.

Can anyone help me??