Re: Random client slow Internet browsing

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The entire company is connected to the same switch, and the entire company tunnels through the same concentrator.
Nothing changed on either device.
As far as malware, I am pretty sure there are no issues, I will however install one more utility on top of the Trend Micro, just to make sure.
I have a feeling it has to do with the DNS, so where do I find a good documentation for a"deep clean"?
I need to backup all my zones or manually record them before I do anything.
SG, EDNS0 is not enabled.

--
Amnon Feiner



"Larry Struckmeyer [SBS-MVP]" <lstruckmeyer@xxxxxxxxxxxxxxx> wrote in message news:ueNE7qUPJHA.1164@xxxxxxxxxxxxxxxxxxxxxxx
All 5 of the suspect ones attached to a intermediary switch?

-Larry

"Amnon Feiner" <amnon@xxxxxxxxxxx> wrote in message news:6n6r3cFk0i3uU1@xxxxxxxxxxxxxxxxxxxxx
Yes the SBS is the DHCP provider.
I ran the CEICW again, it completed with no errors.
I did reboot the server twice ever since, one was for the security update last week.
as far as forwarders...
I am pointing to the parent company DNS servers, as I did before the cleanup, since I need to access their intranet. I have already checked with them, and they say there are no changes on their end, I do believe them, they have a reputable sys admin.
The mystery for me is why do the same pool of clients (about 5 machines) are the only one with the problem? all the rest have no issues what so ever.
I thinking of wiping one of the culprit machines out and see if it help rebuilding it.

--
Amnon Feiner



"Larry Struckmeyer [SBS-MVP]" <lstruckmeyer@xxxxxxxxxxxxxxx> wrote in message news:OfWYPcTPJHA.3748@xxxxxxxxxxxxxxxxxxxxxxx
If the SBS is providing DHCP (you don't say), then I would probably first run the CEICW again, using the DNS servers that your ISP gave you. You also did not say if the SBS has been restarted since you made the changes. Lastly, change the DNS servers to either those Russ gave you or Verizon's or some other major provider.

Let us know....

-Larry

"Amnon Feiner" <none@xxxxxxxx> wrote in message news:6n6ir9Fil0ffU1@xxxxxxxxxxxxxxxxxxxxx

SBS 2003 Premium
NO ISA, Cisco Perimeter
Never used WINS, never had any problem. The problems started about 10 days ago after we cleaned some old orphan scripts and policies from the SYSVOL directory ,and then dleted an old DHCP scope and created a new one.
Single NIC
SBP comes out with no errors.
Trend AV 5.0. No AV scans during the day. Real time is on.

IPCONFIG /ALL
Server:
Windows IP Configuration
Host Name . . . . . . . . . . . . : SBS
Primary Dns Suffix . . . . . . . : mydom.local
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : mydom.local
Ethernet adapter Server Local Area Connection:
Connection-specific DNS Suffix . : mydom.local
Description . . . . . . . . . . . : HP NC7782 Gigabit Server Adapter
Physical Address. . . . . . . . . : 00-12-79-D6-6C-15
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.75.1
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.75.254
DNS Servers . . . . . . . . . . . : 192.168.75.1

Client with issues.
Windows IP Configuration
Host Name . . . . . . . . . . . . : ADMIN02
Primary Dns Suffix . . . . . . . : mydom.local
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : mydom.local
mydom.local
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : mydom.local
Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connection
Physical Address. . . . . . . . . : 00-13-20-C0-56-0F
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.75.49
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.75.254
DHCP Server . . . . . . . . . . . : 192.168.75.1
DNS Servers . . . . . . . . . . . : 192.168.75.1
Primary WINS Server . . . . . . . : 192.168.75.1 *rem Is this proper if I do not have it enabled?
Lease Obtained. . . . . . . . . . : Sunday, November 02, 2008 9:31:56 AM
Lease Expires . . . . . . . . . . : Monday, November 10, 2008 9:31:56 AM


--
Amnon Feiner


"Larry Struckmeyer [SBS-MVP]" <lstruckmeyer@xxxxxxxxxxxxxxx> wrote in message news:ul67MfSPJHA.3876@xxxxxxxxxxxxxxxxxxxxxxx
Hi Amnon:

SBS? 03 or 08? If SBS, one nic or two? ISA? What brand of firewall?

Might also help to see the output from ipconfig /all > c:\iptest.txt

from the workstation and the server.

Install and run the sbs bpa, fix whatever it finds.

www.sbsbpa.com

what about av scans kicking in at the time the slowness starts? Any other symptoms, such as programs also running more slowly?

-Larry

"Amnon Feiner" <none@xxxxxxxx> wrote in message news:6n6a0aFk6ba7U1@xxxxxxxxxxxxxxxxxxxxx
I have a weird one:
Random clients encounter very slow browsing.
The only remedy is to log off and back on, the problem is immediately solved.

Slowness can happen as soon as you log on, or after being logged on for a while, even if your browser is closed, simply logged on.
This is not a browser related issue, as I tried 4 different browsers on the same machine when slowness starts, and all 4 will be slow.
The computers are not in the same OU, so I do not think this a policy related.
Some have static IP, some are DHCP.
We do not use WINS on the network.
Does not happen in a specific time frame, can happen any time.

Exceptions:
Does not seem to happen on the servers but we do not work on any servers so I cannot verify. Random workstations, some workstations have never encountered the issue (or did not report it).

--
Amnon Feiner











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