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SBS 2003 Keeps Loosing Internet Connection!

We are running SBS 2003 Premium and for the past 2 morning we have lost our internet connection. I have gone through and looked at the processes and it seems all that should be started are running.

Actually I just lost it again as I was typing! Yesterday it stayed up until this morning after restarting 3 times. I'm lost on what to narrow this down to as it works and then does not work.

Do I need to install SP1 or any other update? I have run automatic update for the last month and it shows no other updates to install but I know SP1 is not installed.

I'm still a rookie IT guy so I need some guidence!

Mike
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MikeASchreiner
Asked:
MikeASchreiner
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3 Solutions
 
NYtechGuyCommented:

Yes - Install the service packs:

SBS2003 SP 1 - http://download.microsoft.com/download/0/5/0/0503C927-F573-43A1-A184-97D755345F59/SBS2003-KB885918-SP1-X86-ENU.EXE

Exchange2003 SP2 - http://www.microsoft.com/downloads/details.aspx?FamilyId=535BEF85-3096-45F8-AA43-60F1F58B3C40&displaylang=en

Also - please let us know:  are you using the ISA server component of SBS?  ISA (Internet Security & Acceleration) server is the 'proxy server' component of SBS that works as a firewall protecting network clients from the internet.

Thanks - Justin


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NYtechGuyCommented:

one other thing:  If you are using ISA - when you have this issue, are *BOTH* the clients and the server unable to get to the internet?
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MikeASchreinerAuthor Commented:
Justin,

Yes I'm using the Windows firewall not a 3rd party one.

Yes All clients and the server can not acces the internet. I know the T1 is fine as I have connected to it by passing the SBS server.

I'll install the SP's or at least begin the process and keep an eye out for your next reply.

Thanks! Mike
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NYtechGuyCommented:

Mike:

Do install those SPs, and take screenshots (ALT + PRNT SCRN) of any error messages or pop ups you are not sure about for future reference.

Also- things to look out for/general advice:

- Verify all cable connections (actually replace all concerned ethernet cables:  server -> router, server -> switch... with BRAND NEW ones of high quality)
- Check event viewer logs (System & Application) for any error messages or warning that (1) look like they directly apply (2) you are not sure about
- Update ALL network card drivers on the server to the newest supported levels offered from the OEMs (Dell, HP) support download site
- If they are PCI network cards, try them in different slotss
- Restart the Router (first) and then the switch and server just to rule that out

**IF you go down again, from a command line on the server, PING the following: (example:  ping 192.168.1.1)

- default gateway (which should be the ROUTER ip address)
- something inside the network (PC, print server, etc)
- 127.0.0.1
- localhost
- IP address of each network card on the server
--then report back whether each of these pings were 'timed out' or if you receive a reply

Thanks!  Justin

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MikeASchreinerAuthor Commented:
Justin,

thank you for the advice! I'll be busy today and this evening doing all of this and I'll give you my results as soon as I find out!

Thanks,
Mike
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NYtechGuyCommented:

doing all of this will either solve your problem, or rule out 99% of the things that can be causing it - and narrow down what the cause is.

Good luck - Justin
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MikeASchreinerAuthor Commented:
Justin,

Does the link above work for SBS 2003 Premium Edition?

Looks like I might need to order the CD for SP1 on the Premium Edition.

can you confirm this for me? I do not want to in stall the wrong update!
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NYtechGuyCommented:


Mike - yes it does work:

> "Important If you are running the Premium Edition of Windows SBS 2003, you can still download the Standard Edition of the service pack. However, you must also > > order the CD package to install the additional service packs necessary for the Premium Edition."

(quoted from this site:  http://www.microsoft.com/downloads/details.aspx?FamilyId=B6F8A4C0-B707-4161-ADEB-44F1B756119F&displaylang=en)

I would go ahead and install, and order the CD as well.



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rindiCommented:
How is the server connected to the internet, and how to the rest of the lan? Is the Server the dhcp server for your LAN? Are you sure there aren't any other DHCP servers active? Is there also a wireles lan with access points? Have you made sure the DNS server settings on your server is only pointing to itself, and no other dns servers (also make sure the dhcp server is only supplying the client PC's with the server's dns address, and none other)? When you loose the internet connection, can you still ping external ip addresses (try ping 66.249.85.99)?
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
I would NOT install Exchange SP2 until you get your system stabilized.  It's not required to do so.

Also... installing SBS SP1 (http://sbsurl.com/sp1) to a misconfigured system will not fix it and can only make it worse.  You need to make sure the configuration is right before installing SP1.

Please post an IPCONFIG /ALL to review.

Jeff
TechSoEasy
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MikeASchreinerAuthor Commented:
Here is the IPCONFIG /ALL

I do have all the updates downloaded just waiting for the end of the day to do my work.



Windows IP Configuration



   Host Name . . . . . . . . . . . . : dtsserver01

   Primary Dns Suffix  . . . . . . . : DTS.local

   Node Type . . . . . . . . . . . . : Unknown

   IP Routing Enabled. . . . . . . . : Yes

   WINS Proxy Enabled. . . . . . . . : Yes

   DNS Suffix Search List. . . . . . : DTS.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. . . . . . . . . . . . : 192.168.16.19

   Subnet Mask . . . . . . . . . . . : 255.255.255.255

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

   NetBIOS over Tcpip. . . . . . . . : Disabled



Ethernet adapter Network Connection:



   Connection-specific DNS Suffix  . :

   Description . . . . . . . . . . . : HP NC7781 Gigabit Server Adapter

   Physical Address. . . . . . . . . : 00-0E-7F-B2-E4-85

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

   IP Address. . . . . . . . . . . . : 216.133.82.66

   Subnet Mask . . . . . . . . . . . : 255.255.255.224

   Default Gateway . . . . . . . . . : 216.133.82.65

   DNS Servers . . . . . . . . . . . : 192.168.16.2

   NetBIOS over Tcpip. . . . . . . . : Disabled



Ethernet adapter Server Local Area Connection:



   Connection-specific DNS Suffix  . :

   Description . . . . . . . . . . . : HP NC7781 Gigabit Server Adapter #2

   Physical Address. . . . . . . . . : 00-0E-7F-B2-E4-84

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

   IP Address. . . . . . . . . . . . : 192.168.16.2

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

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

   DNS Servers . . . . . . . . . . . : 192.168.16.2

   Primary WINS Server . . . . . . . : 192.168.16.2
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NYtechGuyCommented:

Mike-

can you please give us a description of your network layout - what is connected to what?  

- Router connected directly to server NIC #1
- Server NIC #2 connected to network switch

Is there anything between the WAN router and the server (another switch, hub, etc?)

Thanks,

justin
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
Thanks, can you also post one from a workstation?

Jeff
TechSoEasy
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MikeASchreinerAuthor Commented:
Netopia T1 Router
to
Linksys Etherfast 4121 24-port 10/100 Switch
to
Nic #1

Nic#2
to
D-link DES-3250TG 10/100/1000 Switch


Also, What would the iLo ethernet port on the server be?
As i have a link from the Linksys switch to that as well.

Hope this helps!
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MikeASchreinerAuthor Commented:
Here is a Client IPCONFIG /ALL



Windows IP Configuration



        Host Name . . . . . . . . . . . . : ITACER01

        Primary Dns Suffix  . . . . . . . : DTS.local

        Node Type . . . . . . . . . . . . : Hybrid

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

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

        DNS Suffix Search List. . . . . . : DTS.local

                                            DTS.local



Ethernet adapter Local Area Connection:



        Connection-specific DNS Suffix  . : DTS.local

        Description . . . . . . . . . . . : Broadcom 440x 10/100 Integrated Controller

        Physical Address. . . . . . . . . : 00-C0-9F-35-56-FC

        Dhcp Enabled. . . . . . . . . . . : Yes

        Autoconfiguration Enabled . . . . : Yes

        IP Address. . . . . . . . . . . . : 192.168.16.20

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

        Default Gateway . . . . . . . . . : 192.168.16.2

        DHCP Server . . . . . . . . . . . : 192.168.16.2

        DNS Servers . . . . . . . . . . . : 192.168.16.2

        Primary WINS Server . . . . . . . : 192.168.16.2

        Lease Obtained. . . . . . . . . . : Tuesday, June 06, 2006 9:31:15 AM

        Lease Expires . . . . . . . . . . : Wednesday, June 14, 2006 9:31:15 AM



Ethernet adapter Wireless Network Connection:



        Media State . . . . . . . . . . . : Media disconnected

        Description . . . . . . . . . . . : Intel(R) PRO/Wireless LAN 2100 3B Mini PCI Adapter

        Physical Address. . . . . . . . . : 00-0C-F1-06-37-62

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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
So, are you actually losing your internet connection at the server?  Or from the workstations?  Do you know?

Jeff
TechSoEasy
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MikeASchreinerAuthor Commented:
Here is what I know for sure!

When we loose the internet the clients & the server can not access it through IE explorer.
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
well, then it's occuring at the server.

My first guess would be that it's an MTU setting (should be set at 1420).  But I also am assuming that you are sharing this connection because of the way you have a switch between your SBS and the T-1, and you have a public IP address on your external NIC?

If that's the case, it could be caused by packets crashing in the Linksys switch from other sources.

Jeff
TechSoEasy
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MikeASchreinerAuthor Commented:
Here is what I have connected to the Linksys switch.

Wireless Access Point
Wireless Router
Nic #1
Work Station

I know we Run Wireless Linksys Web Cameras so that is part of the config.
Wireless Router is so we can connect wireless if needed
Work Station does not need network access just internet
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MikeASchreinerAuthor Commented:
Do I need to change the MTU setting through registry edits?
I have never done this before.

I really want to make sure my system is set up the best way possible!

Thanks!
Mike
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NYtechGuyCommented:

Mike -

I think the key is to confirm the hardware & cable connections before you do anything.

Have you followed my suggestions way above re: cables, drivers, PCI cards, etc?  Those are very good possibilities- please do this or confirm you did already.

I would also add to that mix the following possibilities:

(1) Upstream DNS issue - ie: the DNS servers that your SERVER looks to (usually the ISP's DNS servers)
- You should confirm that the DNS servers listed in the FORWARDERS tab of your server's DNS applet (Administrative Tools -> DNS) are valid (call your ISP and ask)
- You should PING each server and see what the response time is - put the one with the lowest response time FIRST in the list
- Use NSHOOKUP (http://www.netstrap.com/residns/nshookup.htm) to verify the DNS servers actually resolve names (yahoo.com, 'A RECORD')

(2) Linksys Switch Faulty - or some link type problem (auto negotiate issue, conflict, etc)
- Is there another switch you can put in place here temporarily- just to confirm that the linksys is NOT the issue?

Keep us updated!

Justin
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rindiCommented:
What's this?

>> 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. . . . . . . . . . . . : 192.168.16.19

>>   Subnet Mask . . . . . . . . . . . : 255.255.255.255

>>   Default Gateway . . . . . . . . . :

>>   NetBIOS over Tcpip. . . . . . . . : Disabled

It seems to be in the same lan segment as the LAN itself. This shouldn't be... try another segment like 192.168.1.xx. And what type of interface is this?
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MikeASchreinerAuthor Commented:
I'm tired I'll read in the daytime i have been up all day up to now so I need to go sleep for a bit. I'm not sure what you are saying rindi. But I am tired.
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
Here's how to change the MTU: http://support.microsoft.com/kb/826159

I would also agree with Justin that you should double-check all hardware connections/cables.  The Netopia Router should have some kind of logging feature which may provide you with clues as to what's happening as well.

rindi:  That is a NORMAL RRAS VPN interface and is configured correctly (it's automatically configured by the Remote Access Configuration Wizard).

Jeff
TechSoEasy
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MikeASchreinerAuthor Commented:
Well,

Here is all that I did last night!

All drivers are updated.
All patch cords were checked.(Finally got my wiring cleaned up too!!!!)
Installed all required files for SP1 upgrade.
Made sure the proper services were starting up automatically like sharepoint.
Netopia Router Logs were clean according to ISP as it is managed by them.

So fasr so good! I'll wait a little while to let people get here and start logging in. As it seems to happen once people start showing up. So I suppose we will put it to the test in about 1 hour. I will come back later on this morning or afternoon with an update on what is going on.

BTW do I still need to change the MTU or would it be a good idea?

Thanks a bunch guys!
Mike
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
Couldn't hurt to check the MTU settings.  

Jeff
TechSoEasy
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NYtechGuyCommented:


MTU not a bad idea.

Mike - Keep in mind *IF* you do go down, to do the following:

(1) PING tests I outlined above
(2) Check event viewer logs and router logs

(maybe print the ping tests out in case you are down)

/Justin
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NYtechGuyCommented:


Mike - one other thing:

- Please verify your upstream DNS servers as I asked above

thanks
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MikeASchreinerAuthor Commented:
Thanks everyone! We have been up all morning so far! I have checked everything you guys have suggested. The only thing I need to do is reboot the server tonight for the MTU settings to take effect from the registry entries. I want to leave this open through the weekend just in case. If everything is steady I will award points on Monday and I'll probably up the points and split as earned for all of you.

Thanks again!
Mike
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MikeASchreinerAuthor Commented:
I awarded points!

Everything is still up and running through the weekend so it seems everything is ok so far! Thanks for the excellent advice guys! I could not figure out how to up the points sorry as I must have overlooked where you can do that!
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