ICS client cant browe most websites

  • Thread starter Thread starter Royalga1a
  • Start date Start date
R

Royalga1a

Hi,

after I changed my internet connection from Rogers Cable to Sympatico ADSL,
all my ICS clients can't browse most websites like msn.com. These clients
can browse the first page of Yahoo.com, but can't get into some pages like
MyYahoo!. All this problem happened after I changed the Internet connection
type. I tried to change the gateway's MTU size from 1500 to 1492, add
ArpCacheMinReferencedLife as FFFFFFFF, no helps! Anyone can tell me how to
fix this? Thx!
 
The problem may be that Win2K ICS is a Black Hole Router. Read about
Black Hole Routers here:
http://support.microsoft.com/?id=314825

To see the Black Hole behavior, try these two commands from a DOS
window on the Gateway machine and the other machines:

ping www.ebay.com -f -l 1472
ping www.ebay.com -f -l 1432

Also try www.google.com and www.abcnews.go.com. The gateway machine
for 1472 will respond "packet needs to be fragmented but DF Set."

On my network all other setting will respond "Request timed out."
When browsing, the gateway machine sees the message and reconnects
with a smaller MTU. But the gateway never relays this information to
the ICS clients. The critical size may be smaller than 1432 on your
network,

The workaround is to use Method 3 from the article and set the MTU
size of the client machines to 1460 (=1432+28). (or whatever size
works on your machine plus 28)

I'm hoping that one of the pros here will pick up on this and get
Microsoft to fix ICS.
 
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