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WPAD.dat Where is it???

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WPAD.dat Where is it??? - 23.Sep.2005 12:01:00 PM

rmccollum

Posts: 11
Joined: 10.Aug.2005
From: Tularosa, NM
Status: offline

I have a situation - Win Server 2003 Std. SP1 w/DNS, DHCP,
ISA on it and is part of an Active Directory domain. When Automatic Discovery is selected in IE6 it fails. When I run "FWCTool TestAutoDect /type: DHCP" I get the following listing. Would seem the file WPAD.DAT does not exist - so where is it and what creates it?

Listing:
C:\isa>fwctool testautodetect /type: dhcp

FwcTool version 4.0.3439
Firewall Client for ISA Server 2004 support tool
Copyright (c) Microsoft Corporation. All rights reserved.

Action: Test the auto detection mechanism
Type: DHCP

Detection details:

Timeout is set to 60 seconds
Locating WSPAD URL in DHCP Server
Locating option 252 in DHCP
Reading network adapters information
Option found on adapter:
{1FF6EE8B-1ABC-4EE8-B7D3-E2BCE7D527AE}
DHCP option for WPAD found:
http://omega.nmsbvi.net:8080/wpad.dat
WSPAD URL found in DHCP Server:
http://omega.nmsbvi.net:8080/wspad.dat
Initializing Web server connection
Resolving IP addresses for omega.nmsbvi.net
Resolved 1 address(es):
192.168.1.63
Connecting to address #1: 192.168.1.63:8080
Waiting for address #1 to connect
Address #1 successfully connected
Requesting wspad.dat file
Received HTTP error 401
Requested file could not be found on this server
No more address
Failed to detect ISA Server

Result: The command failed and was not completed.

Post #: 1

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RE: WPAD.dat Where is it??? - 23.Sep.2005 12:21:00 PM

LLigetfa

Posts: 2184
Joined: 10.Aug.2004
From: fort frances.on.ca
Status: offline

WPAD exists in virtual reality. It is manufactured on the fly by ISA and cannot be found as a file on the server. It is normally hosted on port 80, not 8080. 8080 is normally the WP listener.

(in reply to rmccollum)

Post #: 2

RE: WPAD.dat Where is it??? - 23.Sep.2005 1:39:00 PM

rmccollum

Posts: 11
Joined: 10.Aug.2005
From: Tularosa, NM
Status: offline

Changed to port 80 - same symptoms,see listing, what is;
Received HTTP error 401
Requested file could not be found on this server
tell me that I don't see here - is it filter/block?

Detection details:

Timeout is set to 60 seconds
Locating WSPAD URL in DHCP Server
Locating option 252 in DHCP
Reading network adapters information
Option found on adapter:
{1FF6EE8B-1ABC-4EE8-B7D3-E2BCE7D527AE}
DHCP option for WPAD found:
http://omega.nmsbvi.net:80/wpad.dat
WSPAD URL found in DHCP Server:
http://omega.nmsbvi.net:80/wspad.dat
Initializing Web server connection
Resolving IP addresses for omega.nmsbvi.net
Resolved 1 address(es):
192.168.1.63
Connecting to address #1: 192.168.1.63:80
Waiting for address #1 to connect
Address #1 successfully connected
Requesting wspad.dat file
Received HTTP error 401
Requested file could not be found on this server
No more address
Failed to detect ISA Server

Result: The command failed and was not completed.

(in reply to rmccollum)

Post #: 3

RE: WPAD.dat Where is it??? - 23.Sep.2005 1:42:00 PM

LLigetfa

Posts: 2184
Joined: 10.Aug.2004
From: fort frances.on.ca
Status: offline

quote:
is it filter/block?

You tell me. Do you have an anonymous rule to allow it?

(in reply to rmccollum)

Post #: 4

RE: WPAD.dat Where is it??? - 23.Sep.2005 3:00:00 PM

rmccollum

Posts: 11
Joined: 10.Aug.2005
From: Tularosa, NM
Status: offline

It would appear I'm not allowing it the access via an anonymous rule. Would have thought that was allowed at the system policy level...??

What should that rule look like?

Also - thanks for the dialog...

"Everyone takes the limits of [their] own vision for the limits of the world."
-- Arthur Schopenhauer (1788-1860) http://plato.stanford.edu/entries/schopenhauer/

(in reply to rmccollum)

Post #: 5

RE: WPAD.dat Where is it??? - 23.Sep.2005 6:28:00 PM

rmccollum

Posts: 11
Joined: 10.Aug.2005
From: Tularosa, NM
Status: offline

Here is the problem's fix, see above and have not tried it with port 8080 (would think it will work) or on Small Business Server - yet:

At the ISA 2K4 Server do this fix:
http://support.microsoft.com/default.aspx?scid=kb;en-us;885683

At a workstation that has access to the ISA server, DHCP, via the network and FWCTool installed locally:

C:\isa>fwctool testautodetect /type: dhcp

FwcTool version 4.0.3439
Firewall Client for ISA Server 2004 support tool
Copyright (c) Microsoft Corporation. All rights reserved.

Action: Test the auto detection mechanism
Type: DHCP

Detection details:

Timeout is set to 60 seconds
Locating WSPAD URL in DHCP Server
Locating option 252 in DHCP
Reading network adapters information
Option found on adapter:
{1FF6EE8B-1ABC-4EE8-B7D3-E2BCE7D527AE}
DHCP option for WPAD found:
http://omega.nmsbvi.net:80/wpad.dat
WSPAD URL found in DHCP Server:
http://omega.nmsbvi.net:80/wspad.dat
Initializing Web server connection
Resolving IP addresses for omega.nmsbvi.net
Resolved 1 address(es):
192.168.1.63
Connecting to address #1: 192.168.1.63:80
Waiting for address #1 to connect
Address #1 successfully connected
Requesting wspad.dat file
Web server is connected and ready to send WSPAD file
Downloading WSPAD file
WSPAD file was downloaded successfully
Detected ISA Server: Omega.nmsbvi.net:1745

Result: The command completed successfully.

At the workstations configure IE via Tools -> Intenet Options -> Connections -> LAN Settings -> Automatically Detect Setting checked (Others not checked)-> OK -> OK -> Close

Now the workstation IE Browser(s)can Detect Proxy Setting and find their way out via the Web Proxy to URL and such via the filtering policies. Also if Automaic Discovery is unchecked along with Web Proxy unchecked (SecureNAT) all are blocked from accessing the web - that's a good thing on this paticular network.

[ September 25, 2005, 10:04 AM: Message edited by: rmccollum ]

(in reply to rmccollum)

Post #: 6