Re: Hotmail redirection causes IE to report DNS error
- From: Marvey <Marvey@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Sun, 26 Mar 2006 16:29:01 -0800
Ace,
Thanks for the reply. A little more info.
The ADSL router is not connected directly to the server.
When I manually changed the TCP/IP settings of a workstation to use the
router as it's DNS server access to Hotmail works fine.
I added the router's IP address into the list of forwarding servers however
I still have the same problem (I did this purely as a test).
It is quite strange in that, I can successfully login to Hotmail with my
account (most of the time anyway), however users at the site cannot. I have
tried a different domain user account but I get the same result.
The problem is purely related to the redirection after the user logs in.
For example.
With my Hotmail login, I redirect to by12fd.bay12.hotmail.msn.com.
The user I have been testing with onsite, they should be getting redirected
to by102fd.bay102.hotmail.msn.com however IE reports an error that
hotmail.msn.com is not able to be displayed.
Once they pass login.passport.net, it all falls over. This only happens
when DNS is being performed by the server. All other internet access is
working fine.
Michael
"Ace Fekay [MVP]" wrote:
In news:FE7152B8-FE6B-4B26-AFFB-0CCAF88BEDFA@xxxxxxxxxxxxx,.
Marvey <Marvey@xxxxxxxxxxxxxxxxxxxxxxxxx> stated, which I commented on
below:
We have a client that is running a Windows Server 2003 box (used to
be SBS 2003) and it is doing internal and external DNS. Internet
access is running fine except for Hotmail. Staff are able to access
the Hotmail login page and login. However the redirection after
login fails with a DNS error (reported by IE).
I have flushed the resolver cache however I have the same problem. I
tested by changing the one of the workstations to use the ADSL router
for DNS and Hotmail works fine.
None of the Hotmail sites are being blocked by IE. The server has
the same addresses for the forwarders as the ADSL router has listed
in it's DNS server table provided by the ISP.
Any suggestions as to what else I should be checking?
Just ensure that all machines only use your internal DNS server and point
the forwarder to your ISP, as I assume what you meant in your post. If the
ISPs DNS is not providing resolution, try 4.2.2.2 as the forwarder.
Since it's ADSL, my other thought is a possible MTU issue. MTU that is lower
than 1500 will cause this and is a classic issue with ADSL.
Is the ADSL modem connected directly to the server or are you using a
Linksys or similar router? If connected directly, I would highly suggest to
purchase an inexpensive LInksys DSL/cable router to alleviate the MTU issue
and take the burden off the machine that the ADSL modem is connected to.
Also with ADSL if directly connected, DNS is known to shut down it's
services when the ADSL falls asleep and requires restarting the DNS service
(not the whole server) to kick it back on, so to speak. ANother good reason
for an inexpensive DSL/Cable router.
Another issue can be EDNS0, which allows UDP packets above 500 bytes. If a
firewall is being used, such as a PIX, (and some others), then that will
cause resolution to fail with DNS query responses that have more 500 bytes
of data, but I don't believe there is such a device being used.
--
Ace
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Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT, MVP
Microsoft MVP - Directory Services
Microsoft Certified Trainer
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