SBS Server not communicating with the outside world

[davidjpowell]

I run a SBS server, 2003 R2. This afternoon email connectivity appears to have collapsed as does my VPN longon capability.

I have carried out some checks. and have determined that the Server's IP address is no longer shown in the router (BT Business router) connections list. All the Port forwarding settings have also disappeared, but can't do anything about this until connectivity returns anyway.

Router does still connect to the Internet. I have checked the connections between the router and server and all seem ok. The server notes when I disconnect the network wire, and shows a red and orange led.

I'm a bit stuck, and any help would be appreciated.

David

[driver67]

At the very minimum get to a command prompt :-

ipconfig /all

And post results.

[davidjpowell]

Microsoft Windows [Version 5.2.3790]
(C) Copyright 1985-2003 Microsoft Corp.

C:\Documents and Settings\dpowell>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : officeserver
Primary Dns Suffix . . . . . . . : Proppro.local
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : Yes
DNS Suffix Search List. . . . . . : Proppro.local

Ethernet adapter Network Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet
Physical Address. . . . . . . . . : 00-1E-C9-46-44-B6
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.0.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 192.168.1.2
Primary WINS Server . . . . . . . : 192.168.1.2
NetBIOS over Tcpip. . . . . . . . : Disabled

Ethernet adapter Server Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet #2
Physical Address. . . . . . . . . : 00-10-18-34-90-D7
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.1.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : 192.168.1.2
Primary WINS Server . . . . . . . : 192.168.1.2

192.168.0.2 is the naughty one...

[davidjpowell]

The VPN is coming up with error 800 which says cannot connect. Router log file shows it's blocking connections. Presumablly the ones that it would normally pass to the server...

[driver67]

Well both the network cards are on different subnets with a class c 255.255.255.0

And the DNS setting from card 1 says to use card 2 as the dns server address. Weird IP Config.

What happens if you do :-

tracert 81.86.0.20

from a command prompt.

Also,

tracert news.bbc.co.uk

Are you sure you it's not BT that have went down ? Has anyone changed these settings ?

Edited by driver67 on Wednesday 5th January 20:26

Edited by driver67 on Wednesday 5th January 20:27

[joewilliams]

davidjpowell said:

I have carried out some checks. and have determined that the Server's IP address is no longer shown in the router (BT Business router) connections list. All the Port forwarding settings have also disappeared, but can't do anything about this until connectivity returns anyway.

This sounds like you're using uPNP - the server asks the router to open the ports that it wants, rather than doing it manually.

The first attempted fix for this kind of thing with SBS2003 is to rerun the E-mail and Internet Connection Wizard.
Open Server Management, go to the Internet and Email section, and click on 'Repair Internet and E-mail Settings'

You can also just open the necessary ports on the router by hand.

[TheD]

Don't believe that the EIC wizard will do its job. Manually open the ports on the router.

[davidjpowell]

It's back - yay!

Not sure what happened to my settings, but follwing this fix worked

TCP/IP stack repair options for use with Windows XP with SP2/SP3.

Start, Run, CMD to open a command prompt:

In the command prompt window that opens, type type the following commands:

Note: Type only the text in bold for the following commands.

Reset TCP/IP stack to installation defaults, type: netsh int ip reset reset.log

Reset WINSOCK entries to installation defaults, type: netsh winsock reset catalog

Reboot the machine.


I have had to reset all the IP address (now set the DNS to something more logical!), and rerun the connection wizzards.

Odd. Many thanks for your help.

David

[theboss]

davidjpowell said:

(now set the DNS to something more logical!)

Dare I ask what?

You want DNS server settings to be just right or you'll have no end of future problems.

In this scenario the only DNS server IP address you want specified is the single IP address of the SBS server, listed on the 'internal' (in this case second) interface. There wasn't really anything wrong with the original config, although the IP address specified on the first NIC was unnecessary.

Edited by theboss on Wednesday 5th January 21:32

[lestag]

If you pull your network cable out of the server and plug it back in, it is possible that the router and the server set their network cards at half duplex and full duplex.
Rebooting the server would of fixed that.

I have seen a network connection go bad on XP/2003 for no reason. To solve it , a shortcut for you is to unplug the server from the network and delete the connection in the control panel, shutdown server, plug in cable and startup server. it will create a new network connection that will work.

One XP PC I had was up to network connection #14....

[davidjpowell]

theboss said:

davidjpowell said:

(now set the DNS to something more logical!)

Dare I ask what?

You want DNS server settings to be just right or you'll have no end of future problems.

In this scenario the only DNS server IP address you want specified is the single IP address of the SBS server, listed on the 'internal' (in this case second) interface. There wasn't really anything wrong with the original config, although the IP address specified on the first NIC was unnecessary.

Edited by theboss on Wednesday 5th January 21:32

Microsoft Windows [Version 5.2.3790]
(C) Copyright 1985-2003 Microsoft Corp.

C:\Documents and Settings\dpowell>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : officeserver
Primary Dns Suffix . . . . . . . : Proppro.local
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : Yes
DNS Suffix Search List. . . . . . : Proppro.local

PPP adapter RAS Server (Dial In) Interface:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface
Physical Address. . . . . . . . . : 00-53-45-00-00-00
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.1.18
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . :
NetBIOS over Tcpip. . . . . . . . : Disabled

Ethernet adapter Network Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet
Physical Address. . . . . . . . . : 00-1E-C9-46-44-B6
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.0.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Disabled

Ethernet adapter Server Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet #2
Physical Address. . . . . . . . . : 00-10-18-34-90-D7
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.1.1
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : 192.168.1.1

C:\Documents and Settings\dpowell>