Re: Downstream compromise

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

Is the netsh feature you list for disabling the rss a possible solution here
that may resolve the downstream compromise? Is it only the Server 2008 which
requires the fix or is it also required on the Windows 7 machine?

As I recall, that upload speed should be half the download and my contract
shows 768 not 384. Not much to do about the ADSL only - we are in the
middle of nowhere and the only option is ADSL unless we go wireless which is
cost prohibitive for our operation.

There is a setting on the wireless router for MTU and it is 1500 - There is
something called MRU listed at 1500 on the Netopia router with 1492 showing
as:

Ethernet 100BT: ( up broadcast default rip-send v1 rip-receive v1 )
inet xxx.xxx.xxx.xxx netmask 255.255.255.248 broadcast xxx.xxx.xxx.xxx
physical address xx-xx-xx-xx-xx-xx mtu 1500

PPP over Ethernet vcc1: ( up broadcast default admin-disabled rip-send v1 )
inet xxx.xxx.xxx.xxx netmask 0.0.0.0 broadcast 255.255.255.255
physical address xx-xx-xx-xx-xx-xx mtu 1492

--
Regards,
Jamie


"Ace Fekay [MCT]" wrote:

"thejamie" <thejamie@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:5ABBD9C1-F3B7-428D-8774-0CC1F11CF7EE@xxxxxxxxxxxxxxxx

--
Regards,
Jamie


"Ace Fekay [MCT]" wrote:


Curious, you said you are using ISA. If you disable ISA, does this all go
away?
Did not try that... will check first thing in the morning.
It could also be:

NAT H.323 issue (if the server has 3 or more NICs).
Yes - three NICs. One is not being used and is disabled but it is there
just the same.
MTU issue on the DLS unit (there are known issues with the reduced MTU
size
that ADSL PPPoE needs).
I can't remember changing the MTU size. Will check though... good
thought.
Issue with the RSS/TCP Chimney feature.

Don't know what the RSS/TCP Chimney feature is... will look into it.
Also, how is the ADSL router setup? Is it in bridge mode to another
router
internally, then to Windows 2008, or is 2008 directly plugged in to it
(not
recommended)? If plugged into it, I can see PPPoE causing issues.

Router is in bridge mode.

But if you are saying it is a permissions thing, and you want 2008 not to
control access, maybe it's the ISA thing. Unless you are using VPN
through
2008, which possibly is using NAP, which will stop the connection.

I have a Window 7 machine that hits the network constantly through VPN.
Disabled the IPv6 on the Windows 7 - both to the user's Wireless and on
the
Windows 2008.

It could also be someone is nailing/attacking your system. You can look
at
your ISA logs, or probably go a step further and get an IDS to determine
that.

The logs look okay. Thanks for the leads. Will get back after I check
this
out.


Info on TCP Chimney?RSS:

TCP Chimney and RSS Features May Cause Slow File Transfers or Cause
Connectivity Problems
http://msmvps.com/blogs/acefekay/archive/2009/08/20/tcp-chimney-and-rss-features-may-cause-slow-file-transfers-or-cause-connectivity-problems.aspx

You wouldn't have changed the MTU. It's a default thing that PPPoE uses 8
bits of each TCP packet, which drops the default MTU 1500 to 1492. It's
known to cause issues with internet connectivity. Hence, why I never suggest
ADSL for any of my customers. It's either FIOS, Cable, T1, or SDSL (in that
order). The 384 ceiling causes problems with GPOs and other AD functions,
because the default threshold for certain GPO and some other functions, is
500K. So if there are multiple clients coming in, the best you will get is
the least common denominator between the up/down speeds, and in your case,
it's 384k (ouch).

Ace




.

Relevant Pages

  • Re: Windows XP update Error
    ... Windows Update questions. ... How to Troubleshoot Black Hole Router Issues ... here are quotes from a couple of previous posts about this MTU ... This was "plain vanilla" install. ...
    (microsoft.public.windowsxp.general)
  • Re: Error 0x80072EE2
    ... > list and am therefore unable to update Windows. ... Also, you could have a MTU size issue on a router or similar, see the ... This was "plain vanilla" install. ...
    (microsoft.public.windowsupdate)
  • Re: 0x80072EE2 aft Winupdate?
    ... when you try to use Windows Update ... How to Troubleshoot Black Hole Router Issues ... here are quotes from a couple of previous posts about this MTU ... Microsoft, PLEASE add this to your document so that others don't have to ...
    (microsoft.public.windowsupdate)
  • Re: RH9 + D-link 704P router cant browse google
    ... > I have a shiny new D-link router. ... > google, but no ACKs like other places. ... Tried a million MTU combinations. ... it is blocking news requests from Windows and Linux. ...
    (comp.os.linux.networking)
  • Re: Downstream compromise
    ... The bandwidth is available but the router ... ISA 2004 recognizes all five IP's and NATs them out. ... This is a Windows 2008 Server issue. ...
    (microsoft.public.windows.server.general)