SBS 2003 automatically Blocking Inbound Traffic

My company server suddenly blocked inbound traffic over night. I can access
the internet on the server with no problem, so outbound is good.

I've ran the "Net Diagnostic" utility both network cards passed.

I ping'd the nic cards (127.0.0.1) both passed that.

I checked the TCP/IP filters on each card and they are set to permit all
TCP/UDP/IP Protocals. (Enable TCP/IP is not selected)

Inside my router settings, under attached devices I see the assigned server
static IP address (I've unplugged to clear the address and inserted the cable
(Many times))

Using the router diagnostics I tried to ping the address. I recieve the
"Request timed out".

There's isn't any firewall software or hardware other than the router itself.

Please help!!!!

Can you ping the server from other computers?

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
"New Administrator" <(E-Mail Removed)> wrote in message newsE0C6394-DC82-4353-BC2E-(E-Mail Removed)...
My company server suddenly blocked inbound traffic over night. I can access
the internet on the server with no problem, so outbound is good.

I've ran the "Net Diagnostic" utility both network cards passed.

I ping'd the nic cards (127.0.0.1) both passed that.

I checked the TCP/IP filters on each card and they are set to permit all
TCP/UDP/IP Protocals. (Enable TCP/IP is not selected)

Inside my router settings, under attached devices I see the assigned server
static IP address (I've unplugged to clear the address and inserted the cable
(Many times))

Using the router diagnostics I tried to ping the address. I recieve the
"Request timed out".

There's isn't any firewall software or hardware other than the router itself.

Please help!!!!

Also you specified that you have no software or firewall hardware running.
SBS 2003 comes prepackaged with Microsoft Internet Security and Acceleration
Server (ISA), a software firewall. Im assuming it is disabled? If it is
running, do you have the ISA client running on the workstations, and is it
able to detect the ISA server?

"New Administrator" wrote:

> My company server suddenly blocked inbound traffic over night. I can access
> the internet on the server with no problem, so outbound is good.
>
> I've ran the "Net Diagnostic" utility both network cards passed.
>
> I ping'd the nic cards (127.0.0.1) both passed that.
>
> I checked the TCP/IP filters on each card and they are set to permit all
> TCP/UDP/IP Protocals. (Enable TCP/IP is not selected)
>
> Inside my router settings, under attached devices I see the assigned server
> static IP address (I've unplugged to clear the address and inserted the cable
> (Many times))
>
> Using the router diagnostics I tried to ping the address. I recieve the
> "Request timed out".
>
> There's isn't any firewall software or hardware other than the router itself.
>
> Please help!!!!
>

Thanks for your help and reply's.

The problem has been resolved. It was Windows Firewall.Internet Connection
Sharing (ICS) service. for some reson it had blocked inbound traffic. The
service was @Automatic and the service status read stopped. So i just
disabled the service.

To my understanding i do not want this to stay disabled. How can I configure
to allow Inbound traffic. If i restart it I'm sure it'll go back to blocking
traffic.


"SeriousSam" wrote:

> Also you specified that you have no software or firewall hardware running.
> SBS 2003 comes prepackaged with Microsoft Internet Security and Acceleration
> Server (ISA), a software firewall. Im assuming it is disabled? If it is
> running, do you have the ISA client running on the workstations, and is it
> able to detect the ISA server?
>
> "New Administrator" wrote:
>
> > My company server suddenly blocked inbound traffic over night. I can access
> > the internet on the server with no problem, so outbound is good.
> >
> > I've ran the "Net Diagnostic" utility both network cards passed.
> >
> > I ping'd the nic cards (127.0.0.1) both passed that.
> >
> > I checked the TCP/IP filters on each card and they are set to permit all
> > TCP/UDP/IP Protocals. (Enable TCP/IP is not selected)
> >
> > Inside my router settings, under attached devices I see the assigned server
> > static IP address (I've unplugged to clear the address and inserted the cable
> > (Many times))
> >
> > Using the router diagnostics I tried to ping the address. I recieve the
> > "Request timed out".
> >
> > There's isn't any firewall software or hardware other than the router itself.
> >
> > Please help!!!!
> >