SP2 and Localhost issues

[Chad Amberg]

We have several applications that bind to ports using the
127.0.0.2 address. This is so that they are not
available outside the system it is ran on, and also there
is no chance of interfering with any apps running on the
normal system. Under SP1, 2000, even back to Windows 95,
this works just fine.
However, under XPSP2, the application can bind the ports,
but we can not connect to them at all. Everything just
times out. For example, we will have a POP3 listener on
127.0.0.2 port 110, but anything trying to connect to
that will just time out.
This did not happen with the release candidates or the
betas. Suddenly this doesn't work on the RTM version and
we're just about out of luck when SP2 gets installed on
workstations.
Can anyone tell us why this change was made, and more
importantly, was it a screw up that this happens and it
will be fixed, or will it stay this way?

 

[Ian Tresman]

Can anyone tell us why this change was made, and more
importantly, was it a screw up that this happens and it
will be fixed, or will it stay this way?

This may be the cause, though as of now, it is not online yet. But it
maybe by the time your read this.
---------------------------------------------
From: Greg Lirette [MSFT]
Date: 2004-08-14 22:19:13 PST
Subject: Windows XP SP2 may be unable to make TCP connections to
loopback address other than 127.0.0.1
Newsgroups: microsoft.public.platformsdk.networking

With Windows XP SP2 some applications which connect to the loop back
address range may not function as expected. This is because Windows XP
SP2 prevents connections to the loop back address range for any
address other than 127.0.0.1.

Microsoft support has an update available which addresses this issue
and is available by calling Microsoft support. Reference the fix for
KB 884020.

The fix contains the following file info
13-Aug-2004 22:50 5.1.2600.2505 359,040 Tcpip.sys

Thank you,
Greg Lirette
Microsoft Corporation Critical Problem Resolution
---------------------------------------------

 

[Ian Tresman]

Microsoft support has an update available which addresses this issue
and is available by calling Microsoft support. Reference the fix for
KB 884020.

So I called, and was eventually sent a link to a "hotfix":

Hotfix file: ms-hotfix-196897_ENU_i386_zip.exe
Contains: WindowsXP-KB884020-x86-enu.exe (Run to install)
Also has: WindowsXP-KB884020-x86-Symbols-enu.exe (for debugging).

Installation set-up a restore point, and required restarting my PC to
finish.

And I'm pleased to say that this fixes the problem. I now have
restored access to loopback localhost addresses, 127.0.0.1, 127.0.0.5,
etc.

Regards,
Ian Tresman

 

[Keith]

(e-mail address removed) (Ian Tresman) wrote in message



So I called, and was eventually sent a link to a "hotfix":

Hotfix file: ms-hotfix-196897_ENU_i386_zip.exe
Contains: WindowsXP-KB884020-x86-enu.exe (Run to install)
Also has: WindowsXP-KB884020-x86-Symbols-enu.exe (for debugging).

Installation set-up a restore point, and required restarting my PC to
finish.

And I'm pleased to say that this fixes the problem. I now have
restored access to loopback localhost addresses, 127.0.0.1, 127.0.0.5,
etc.

Regards,
Ian Tresman

Hi i found and downloaded the hotfix but now it needs a password. Can anyone
help?