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Network connections lost Windows 2003 Server

February 8, 2011 at 13:19:21
Specs: Windows 2003 Server

Network connections lost Windows 2003 Server, Reload Drivers Still not working.

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#1
February 8, 2011 at 14:03:19

What connections are you talking about, internal (LAN) or external (internet)?

How is the server connected, router, switch ...?

What happens to the server, right before connection stopped working (updates, installed additional programs ...)?

Can you ping another computer in your LAN from the server?

Can you ping the server from another computer in your LAN?

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#2
February 9, 2011 at 06:10:55

No Lan or Internet access

Switched

Dell PE 4600
Broadcom Gigabit and Intel Both dropped communications.
There were some updates installed 2 weeks before the issues? Only the latest MS Win 2003 updates? But appears to be no reason to loose all net access on both controllers.

No pings returned from server(No Gateway, No Workstation) and cant ping the server.


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#3
February 9, 2011 at 07:39:13

I have done the following.
Attempted to update NIC drivers.
Installed update for Windows Server 2003, x86-based versions (KB948496)

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#4
February 9, 2011 at 14:09:20

Ok, so has the server a link to the switch, means, is the link led for the servers network cards lit at the switch?

What is the output of ipconfig /all at the server?

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#5
February 10, 2011 at 06:08:04

Led lit on network!
Checked ports cables. So its in the box??

Ipconfig is ok.

Interesting thing I have seen,
Ip Obatain IP Remotely, all DHCP is pulled remotely and is correct!


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#6
February 10, 2011 at 07:32:08

Again, what does ipconfig /all show?
How many NICs are in the server?
If there is more that 1 NIC in the server, whats about the default gateway?
Only one NIC should have configured a default gateway.
I assume, the server is configure with static ip addresses, right?

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#7
February 10, 2011 at 08:53:59

Ip config is good.
2 Nics
Gateway is correct.
Yes Static

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#8
February 10, 2011 at 15:22:18

Can you ping some machines by ip address in your LAN and on the internet, from the server?
Where does a traceroute end up, from the server to the internet, at the public gateway?
Where does a traceroute end up, from the server to a local computer in your LAN?

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#9
February 10, 2011 at 15:49:54

mrfixit you would not be asked for information that would compromise your security. If we saw something a mod like me would edit it out to protect you.

Please comply with the requests.

Do note a server getting a ip address via dhcp is a nonstandard server config and prone to many errors because of this.

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#10
February 11, 2011 at 11:29:49

Only letting pull dhcp remotely for now? Avoids human error!

Ok here is the IPconfig.
Just had to goto the machine to pull info!
Windows IP Configuration

Host Name . . . . . . . . . . . . : coents13
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : coe.iup.edu

Ethernet adapter Local Area Connection 9:

Connection-specific DNS Suffix . : coe.iup.edu
Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet
Physical Address. . . . . . . . . : 00-06-5B-88-EE-1D
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : xxx.80.17.148
Subnet Mask . . . . . . . . . . . : 255.255.254.0
Default Gateway . . . . . . . . . : xxx.80.16.1
DHCP Server . . . . . . . . . . . : xxx.80.128.6
DNS Servers . . . . . . . . . . . : xxx.80.128.6
xxx.80.128.27
Primary WINS Server . . . . . . . : xxx.80.128.172
Secondary WINS Server . . . . . . : xxx.80.128.173
xxx.80.128.171
Lease Obtained. . . . . . . . . . : Wednesday, February 09, 2011 3:20:36 PM
Lease Expires . . . . . . . . . . : Wednesday, February 23, 2011 3:20:36 PM

Ethernet adapter Local Area Connection 10:

Connection-specific DNS Suffix . : coe.iup.edu
Description . . . . . . . . . . . : Intel(R) PRO/100 Network Connection #2
Physical Address. . . . . . . . . : 00-06-5B-88-EE-1C
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : xxx.80.17.149
Subnet Mask . . . . . . . . . . . : 255.255.254.0
Default Gateway . . . . . . . . . : xxx.80.16.1
DHCP Server . . . . . . . . . . . : xxx.80.128.6
DNS Servers . . . . . . . . . . . : xxx.80.128.6
xxx.80.128.27
Primary WINS Server . . . . . . . : xxx.80.128.172
Secondary WINS Server . . . . . . : xxx.80.128.173
xxx.80.128.171
Lease Obtained. . . . . . . . . . : Wednesday, February 09, 2011 3:20:36 PM
Lease Expires . . . . . . . . . . : Wednesday, February 23, 2011 3:20:36 PM


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#11
February 11, 2011 at 14:30:47

xxx.80.17.148
xxx.80.17.149


You have both nics plugged into the switch going to the internet.

It would appear that you should have one plugged into the internet and one to the lan. Presently this is not the case.

No one on the lan can contact the server with the present config.
Did someone move a cable???
Do you remember which nic you changed to dhcp?
That would be the nic you need to get cabled to the lan.

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#12
February 11, 2011 at 16:56:22

mrfixit

That's why I asked twice for the output of ipconfig /all

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#13
February 14, 2011 at 11:05:36

@Wander a lil confused because the internet is addressable through the switch. Both nics normally/should have access to both the lan and internet. This correct ip's for us.

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#14
February 14, 2011 at 14:11:57

Did you say, that both, internet and LAN are at xxx.80.17.14x net, so that all the client PCs do also have ip addresses of the range xxx.80.17.xxx ?

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#15
February 15, 2011 at 06:34:59

@Paulsep Ya if I understand the question? No pings out or in to any locations!

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#16
February 15, 2011 at 06:39:35

Have you crosschecked, that the client PCs do really have ip address xxx.80.17.xxx ?

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#17
February 15, 2011 at 06:55:11

" a lil confused because the internet is addressable through the switch. Both nics normally/should have access to both the lan and internet. This correct ip's for us."

OK if you say so. What was the nic that was set to a static ip set to???.

Post a ipconfig /all from a workstation for review.

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#18
February 16, 2011 at 07:17:40

@Wanderer all the same settings static and for the workstations! Of course a different IP. Both Nics are normally set to static just arent during this time of turmoil.

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#19
February 16, 2011 at 07:48:08

mrfixit. What is the issue with getting a ipconfig /all from a workstation?

Do you want to solve this issue? Your server has been inaccessable for 8 days now. I take it this isn't a business? Is this just for training/educational?

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#20
February 16, 2011 at 10:09:50

Windows IP Configuration

Host Name . . . . . . . . . . . . : work11
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : xxx.xxx.xxx

Connection-specific DNS Suffix . : xxx.xxx.xxx
Description . . . . . . . . . . . : Broadcom NetXtreme Ethernet
Physical Address. . . . . . . . . : 00-06-5B-88-EE-1D
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : xxx.80.17.254
Subnet Mask . . . . . . . . . . . : 255.255.254.0
Default Gateway . . . . . . . . . : xxx.80.16.1
DHCP Server . . . . . . . . . . . : xxx.80.128.6
DNS Servers . . . . . . . . . . . : xxx.80.128.6
xxx.80.128.27
Primary WINS Server . . . . . . . : xxx.80.128.172
Secondary WINS Server . . . . . . : xxx.80.128.173
xxx.80.128.171
Lease Obtained. . . . . . . . . . : Wednesday, February 09, 2011 9:21:10 PM
Lease Expires . . . . . . . . . . : Wednesday, February 23, 2011 9:21:10 PM


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#21
February 16, 2011 at 10:35:23

The workstations are not able to communicate with the given DHCP-, DNS-, Primary- and Secondary WINS- Server, because they all are out of the subnet, the workstations belongs to.
E.g.:
You network starts on the given subnet mask at:
xxx.80.16.0
and ends at:
xxx.80.17.255

But the above mentioned servers are on subnet:
xxx.80.128.x

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#22
February 16, 2011 at 11:09:27

@paulsep Yes that is true unless dhcp/dns/wins are pointing to the correct location.
What I have is a local box issue that will not communicate not a network configuration issue! All other systems work fine.
Ip settings are correct.

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#23
February 16, 2011 at 11:24:36

@mrfixit
See your response #2
No Lan or Internet access
...
...
No pings returned from server(No Gateway, No Workstation) and cant ping the server.

How should the server communicate, if the server can not access the DNS server.
Have you tried to ping another machine in the same subnet by ip address, not by name?

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#24
February 16, 2011 at 12:14:55

Ok I see where you might be going with this.
The odd thing is that it does pull DHCP remotely even though you can not ping DHCP/DNS/Win. can not ping a xxx.80.17.xxx system on the same subnet.
In or out.

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#25
February 16, 2011 at 13:28:54

So the question is, how did the server get the ip address remotely, if you are unable to ping any other machine including DHCP server, DNS server a.s.o. ?
Is this running through a VPN tunnel.
You have to shine a light on such necessary things.
Look, we can only guess, based on what info we get from you.

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#26
February 16, 2011 at 14:51:50

Who is in charge of this network? There appear to be multiple routers and servers.

With a 255.255.254.0 subnet [supernet] mask you get a ip range of

xxx.80.16.0 - xxx.80.17.255 with a max 510 hosts.

Yet you have xxx.80.128.x for wins which isn't even in the subnet=normally unreachable without a router.
Gateway is xxx.80.16.1
DHCP/DNS server is at xxx.80.128.6
Wins server is at xxx.80.128.172

It makes no sense to have the server two nics going to the same place. That accomplishes nothing. Mrfixit also changed one nic from static [we still don't know that that ip address was for that nic] to dhcp.

My guess is the server nic that got changed connected to the xxx.80.128.x network. Can you confirm this mrfixit?

There has to be a router between these networks now with dhcp relay enabled.
Otherwise the server and workstations wouldn't be getting dhcp supplied ips.

The original problem was server couldn't be pinged nor could it ping the gateway
"No pings returned from server(No Gateway, No Workstation) and cant ping the server."

Given the ip of both the server and workstation are in the same subnet there is no reason for ping to fail except for...
icmp is blocked [netsh firewall set icmpsetting 8 disable]
3rd party software firewall is blocking icmp

Did you check these mrfixit?

A couple of things to try in confirming this.
do a nslookup yahoo.com
do a nslookup yourservername

Post both results for review.


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#27
February 17, 2011 at 07:03:07

Hi, just so you know I do appreciate your efforts and time!

From work station.

H:\>nslookup yahoo.com
Server: dns2.cc.xxx.xxx
Address: xxx.80.128.6


Non-authoritative answer:
Name: yahoo.com
Addresses: 69.147.125.65
72.30.2.43
98.137.149.56
209.191.122.70
67.195.160.76


H:\>nslookup xxx.80.17.148
Server: dns2.cc.xxx.xxx
Address: xxx.80.128.6

Name: xxxxxxx.xxx.xxx.xxx
Address: xxx.80.17.148


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#28
February 17, 2011 at 08:44:26

Appears name resolution is working fine which means we don't have a network issue but a server issue.

What was the ip address of the nic you changed from static?
Have you checked the firewall config on the server?

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