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SBS 2003:  Internet is suddenly very slow

Posted on 2007-03-21
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Last Modified: 2010-08-05
I set up a SBS 2003 server a couple of weeks ago for a client.  It has been running great.  However, the speed of internet access has somehow been reduced to about 20% of normal.  I called the ISP (Comcast) and of course they said all is good on their side.  I have power cycled everything,  re-ran the Internet Connection wizard, and checked the logs.  On the internal side of the network, the speed is fine.  But IE access (from server or workstations) and Remote Desktop access (logging into this server from the outside) is really slow.  Here is my NIC configuration:

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

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

Windows IP Configuration

   Host Name . . . . . . . . . . . . : server
   Primary Dns Suffix  . . . . . . . : mariposa-dg.local
   Node Type . . . . . . . . . . . . : Unknown
   IP Routing Enabled. . . . . . . . : Yes
   WINS Proxy Enabled. . . . . . . . : Yes
   DNS Suffix Search List. . . . . . : mariposa-dg.local

Ethernet adapter Network Connection:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connection
   Physical Address. . . . . . . . . : 00-13-72-E8-19-56
   DHCP Enabled. . . . . . . . . . . : No
   IP Address. . . . . . . . . . . . : 74.93.58.147
   Subnet Mask . . . . . . . . . . . : 255.255.255.248
   Default Gateway . . . . . . . . . : 74.93.58.150
   DNS Servers . . . . . . . . . . . : 192.168.16.2
   Primary WINS Server . . . . . . . : 192.168.16.2
   NetBIOS over Tcpip. . . . . . . . : Disabled

Ethernet adapter Server Local Area Connection:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : 3Com EtherLink XL 10/100 PCI TX NIC (3C90
5B-TX)
   Physical Address. . . . . . . . . : 00-10-5A-CE-75-B2
   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

Does anyone have any suggestions?
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Question by:brihaspati79
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Expert Comment

by:Stephen Croft
ID: 18768886
Just a quick one,
I noticed your DNS addresses for your Internet NIC are set to yourself?

this is ok apart from if your DNS server is having issues translating, that could make the internet seem slow.

Add a second address (or move the 192 one onto the second line in the network settings) that is a DNS server for comcast, and see if that has any difference.
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Expert Comment

by:Mainsouth
ID: 18768903
Hi
What is your connection with Comcast (dsl, T1 etc). I'm assuming your using the server as your firewall as well. I'm surprised to see no ip address for the gateway. Forgive my questions but I need a fuller picture to try and help

Dan
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Expert Comment

by:Stephen Croft
ID: 18768909
Mainsouth,

would the default gateway not be used from his WAN adapter?

Default Gateway . . . . . . . . . : 74.93.58.150

And its working, albeit slowly.
Complete lack of DEF. Gateway would result in a complete cutoff, am i correct?
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Expert Comment

by:Mainsouth
ID: 18768914
Hi
What is your connection with Comcast (dsl, T1 etc). I'm assuming your using the server as your firewall as well. I'm surprised to see no ip address for the gateway. Forgive my questions but I need a fuller picture to try and help

Dan
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Author Comment

by:brihaspati79
ID: 18768922
To DX:
"Add a second address (or move the 192 one onto the second line in the network settings) that is a DNS server for comcast, and see if that has any difference."

Can re-phrase your suggestion?  I didn't quite understand what you meant.  BTW, everything was running really FAST until yesterday.  Also, my server is configured this way too and without issue.

Mainsouth:
Cable internet from Comcast Commercial.  Server is the firewall, one nic for the outside, one for the inside.
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Expert Comment

by:Stephen Croft
ID: 18768932
brih;

in the network settings for that card, you should have something like;

DNS SETTINGS
@ obtain automatically (not selected?)
@set manually
192.168.0.1
(blank boxes for ip)

move 192 to the blanks, and put in Comcast DNS where 192 is.

you could try the Comcast in the second box, but thats upto you.

Reason for it going slow all of a sudden could be Comcast have moved a DNS server or something similar, and your DNS that is on your 2k3 server hasn't seen the update, and therefore is struggling to translate FQDN to ips
just a possibility?
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Author Comment

by:brihaspati79
ID: 18768962
Do you mean for me to do this on the server or a workstation?  I am trying to get back into the server with TS and it is going even slower now.  I might have to wait until I get out there tomorrow.  It just timed out.  Tommorrow for sure.  Any other ideas?  I went over all the basics.  Maybe spyware?  Based on experience, I would swear it is Comcast, but I want to eliminate all of the other possibilites.
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Author Comment

by:brihaspati79
ID: 18769328
Some wiseguy (alright it was me) took a (long) patch cord from the server to the Comcast router and unknowingly replaced it with a (shorter) cross-over cable.  No one really discovered the problem right away as it was limping along.  I apologize for the blunder and want to thank you guys for your help.
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