slow internet speed

when you connect a laptop to the modem directly, are the speeds ok?

Yes the speeds appear fine then,

It could be the symantec too, perhaps you can try to find out if it's that box that could cause the slowdown.
If not we know it's the sbs server/domain, then we can delve into that one.

What kind of computer is it?  What's the CPU speed?  How much memory does it have?  A computer that's low on resources could make anything seem to slow.

Go into Task Manager and compare the Commit Memory to the Physical Memory.  If the commit is higher than the physical, the computer will be swapping and this could slow down some things significantly.

DNS and reverse-DNS resolution problems could also cause delays with Exchange Server and MX records.

Server running SBS 2003 premium
Proliant ML350 G5
Dual Processor
4GB RAM
2 Sets of Raid 1+0

The symantec box doesn't present a problem when laptop is connected, which would lead me to this that i have not set up the dns properly.

Please post a COMPLETE ipconfig /all from the server.

Jeff
TechSoEasy

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

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

Windows IP Configuration

   Host Name . . . . . . . . . . . . : server02
   Primary Dns Suffix  . . . . . . . : example.local
   Node Type . . . . . . . . . . . . : Unknown
   IP Routing Enabled. . . . . . . . : Yes
   WINS Proxy Enabled. . . . . . . . : Yes
   DNS Suffix Search List. . . . . . : example.local

Ethernet adapter Server Local Area Connection:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : HP NC373i Multifunction Gigabit Server Ad
apter
   Physical Address. . . . . . . . . : 00-18-Bh-45-5d-1e
   DHCP Enabled. . . . . . . . . . . : No
   IP Address. . . . . . . . . . . . : 192.168.xx.24
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . :
   DNS Servers . . . . . . . . . . . : 192.168.xx.24
   Primary WINS Server . . . . . . . : 192.168.xx.24

Ethernet adapter Network Connection:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : HP NC1020 Gigabit Server Adapter 32 PCI
   Physical Address. . . . . . . . . : 00-19-65-4e-29-A5
   DHCP Enabled. . . . . . . . . . . : No
   IP Address. . . . . . . . . . . . : 192.168.xx.x5
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 192.168.0.1
   DNS Servers . . . . . . . . . . . : 192.168.xx.24
   Primary WINS Server . . . . . . . : 192.168.xx.24
   NetBIOS over Tcpip. . . . . . . . : Disabled

C:\Documents and Settings\Administrator>

C:\Documents and Settings\Administrator>

Try and NBTSTAT -AN and find out how much traffic you are generating, maybe Symantec is in a fit of updating.  See how much traffic is being generated on this network via this machine, Your hardware is definetly up to par.  I think you have a traffic issue.

Well, you x'd out information about your PRIVATE IP addresses which would not at all create a security issue because these are not routable on the Internet.  Therefore, I'm unable to help you resolve the problem.. unless you repost with full information.  

I will again reiterate, this is in no way a risk to the security of your network.

Jeff
TechSoEasy

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

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

Windows IP Configuration

   Host Name . . . . . . . . . . . . : server02
   Primary Dns Suffix  . . . . . . . : example.local
   Node Type . . . . . . . . . . . . : Unknown
   IP Routing Enabled. . . . . . . . : Yes
   WINS Proxy Enabled. . . . . . . . : Yes
   DNS Suffix Search List. . . . . . : example.local

Ethernet adapter Server Local Area Connection:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : HP NC373i Multifunction Gigabit Server Ad
apter
   Physical Address. . . . . . . . . : 00-18-Bh-45-5d-1e
   DHCP Enabled. . . . . . . . . . . : No
   IP Address. . . . . . . . . . . . : 192.168.10.24
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . :
   DNS Servers . . . . . . . . . . . : 192.168.10.24
   Primary WINS Server . . . . . . . : 192.168.10.24

Ethernet adapter Network Connection:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : HP NC1020 Gigabit Server Adapter 32 PCI
   Physical Address. . . . . . . . . : 00-19-65-4e-29-A5
   DHCP Enabled. . . . . . . . . . . : No
   IP Address. . . . . . . . . . . . : 192.168.0.5
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 192.168.0.1
   DNS Servers . . . . . . . . . . . : 192.168.10.24
   Primary WINS Server . . . . . . . : 192.168.10.24
   NetBIOS over Tcpip. . . . . . . . : Disabled

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

C:\Documents and Settings\Administrator>nbtstat -an

Server Local Area Connection:
Node IpAddress: [192.168.10.24] Scope Id: []

                NetBIOS Local Name Table

       Name               Type         Status
    ---------------------------------------------
      SERVER02       <00>  UNIQUE      Registered
      Bxxxxxxxxxxx  <00>  GROUP       Registered
      Bxxxxxxxxxxx    <1C>  GROUP       Registered
      SERVER02       <20>  UNIQUE      Registered
      Bxxxxxxxxxxx  <1B>  UNIQUE      Registered
      Bxxxxxxxxxxx  <1E>  GROUP       Registered
      Bxxxxxxxxxxx   <1D>  UNIQUE      Registered
    ..__MSBROWSE__.<01>  GROUP       Registered
    HLSERVER0010...<00>  GROUP       Registered

Network Connection:
Node IpAddress: [192.168.0.5] Scope Id: []

    No names in cache

C:\Documents and Settings\Administrator>

MY ISP had changed the dns servers, when i inserted new dns ip to forwarders the the speed picked up again.

Thanks for all your help
Kapoc