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NTL ICS Problem

Posted on 2003-03-30
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Medium Priority
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Last Modified: 2010-03-19
I have an NTL cable modem running off a Windows 2000 Advanced Server nad I am trying to get ICS to work.  I have had this working fine many times in the past but now I have a problem.  The problem seems intermittent - probably working about 25% of the time.  The client seems to have DNS issues not being able to resolve names to ip addresses.  If I ping a known IP address for example it always works fine.

I guess who ever can help me with this will need to ask me some questions about my configuration.  Below are my IP settings from my client



Windows 2000 IP Configuration



     Host Name . . . . . . . . . . . . : daveamour
     Primary DNS Suffix  . . . . . . . :
     Node Type . . . . . . . . . . . . : Mixed

     IP Routing Enabled. . . . . . . . : No

     WINS Proxy Enabled. . . . . . . . : No


Ethernet adapter Local Area Connection:



     Connection-specific DNS Suffix  . :
     Description . . . . . . . . . . . : NETGEAR FA311 Fast Ethernet PCI Adapter
     Physical Address. . . . . . . . . : 00-A0-CC-74-E5-06

     DHCP Enabled. . . . . . . . . . . : No

     IP Address. . . . . . . . . . . . : 192.168.0.100

     Subnet Mask . . . . . . . . . . . : 255.255.255.0

     Default Gateway . . . . . . . . . : 192.168.0.1

     DNS Servers . . . . . . . . . . . : 194.168.4.100
                                         194.168.8.100

Awaiting help...

Thanks

Dave
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Question by:daveamour
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14 Comments
 
LVL 41

Expert Comment

by:stevenlewis
ID: 8233694
try using dhcp and see if it
a.) gets a valid ip address from the dhcp server (ICS)
and
b.) is able to resolve names to ip addresses
0
 
LVL 19

Author Comment

by:daveamour
ID: 8243785
Hi

I tried dhcp but the client machine wouldn't aquire an ip address.

Dave
0
 
LVL 41

Expert Comment

by:stevenlewis
ID: 8249437
OK, both machines are w2k?
start by checking the physical layer. the NIC's, cables, etc
swap them out with know good hardware
and for troubleshooting, force the NIC's to 10mbit, half duplex
are you using a hub, or crossover cable
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LVL 41

Expert Comment

by:stevenlewis
ID: 8249441
Also get the latest, greatest drivers for the NIC's
any error messages in event viewer?
0
 
LVL 19

Author Comment

by:daveamour
ID: 8252049
I'm using a hub.

The server is Windows 2000 advanced server

The client is Windows 2000 pro

I've swapped cables etc and thoroughly checked the hardware nad there seems to be no problems there.

If I attach my cable modem to the win 2000 pro machine and set ICS on that and make the Win 2000 Advanced server a client then all works fine.

I have actually reinstalled Windows 2000 Advanced server and shall be finishing off tonight so I'll keep you updated.

Thanks

Ps there are 2 other clients on the network - WinXP so I know the fault lies with the server.

Dave
0
 
LVL 19

Author Comment

by:daveamour
ID: 8255482
Ok I have rebuilt my server and everything was running fine for many hours and then suddenly the same problem again.

Prior to the problem returning I did 2 things.  I installed SQL Server 2000 and I also setup dynamic dns and hit my webserver through its dynamic domain name.

I have stopped both of these services and rebooted a few times but still the same problem.  Is it possible that NTL can detect that I am usinga web server and block ICS.  Can they do this?  I thought that packets in ICS simply used local ports to reroute packets from the server back to the client machine so they would be no way of a third party knowing whether a packet was sent by the server or by the server on behalf of a client?  Maybe NTL put something in the cable modem setup software?

Any ideas?

PS DHCP is working ok now

Cheers

Dave
0
 
LVL 41

Expert Comment

by:stevenlewis
ID: 8257465
> Is it possible that NTL can detect that I am usinga web server and block ICS.
Highly unlikely
>I also setup dynamic dns and hit my webserver through its dynamic domain name
where did you set up dynamic dns
did you set up a dns server on your machine? or are you using www.dyndns.org
0
 
LVL 41

Expert Comment

by:stevenlewis
ID: 8257474
Did you also map a port to your server through ICS?
0
 
LVL 19

Author Comment

by:daveamour
ID: 8258949
I used www.dyndns.com yes

When I set up ICS I simply ticked the sharing option on the cable modem, I didn't doing anything with ports, not sure what you mean to be honest

0
 
LVL 41

Expert Comment

by:stevenlewis
ID: 8265235
Just registring with dyndns.org shouldn't have done it, so suspect the sql server
0
 
LVL 19

Author Comment

by:daveamour
ID: 8268035
Ok I have now removed Windows 2000 Advanced Server and installed Windows 2000 professional.  I have put a dynamic dns client back on along with IIS and SQL Server and everythign works fine.

So that eliminates any hardware issues and brings it down to a software problem.  God knows what though??

Any other thoughts?  Maybe its time to close this question?

Dave
0
 
LVL 41

Accepted Solution

by:
stevenlewis earned 200 total points
ID: 8273061
Hmmm, that's strange, but again that's M$
I have no other thoughts, it's working now :~)
0
 
LVL 19

Author Comment

by:daveamour
ID: 8426026
Ok guys I want to close this question, anyone who wants the points can have them - shout up!

Cheers

Dave
0
 
LVL 19

Author Comment

by:daveamour
ID: 8506925
Ha ha only just realised there was only me an you in this thread, d'oh!

Thanks for all your help!

Dave
0

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