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Error Code 407 Proxy Authentication required

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Error Code 407 Proxy Authentication required - 13.Jul.2009 11:27:15 AM   
JJG323

 

Posts: 27
Joined: 6.Feb.2008
Status: offline

Technical Information (for support personnel)
Error Code: 407 Proxy Authentication Required. The ISA Server requires authorization to fulfill the request. Access to the Web Proxy service is denied. (12209)
Hello been running ISA 2004 on the servers for a while.
At one office/server, I am getting this problem, even when the correct user name and password are entered in. The ISA server just keeps blocking it......
Any suggestions or Help would be appreciated. To my knowledge nothing has changed on the Domain or the configuration of the ISA server

thanks
JJG
Post #: 1
RE: Error Code 407 Proxy Authentication required - 13.Jul.2009 4:21:16 PM   
Rotorblade

 

Posts: 1348
Joined: 27.Feb.2007
Status: offline
Hi,

A few things to check:

Client (Server at office) member of domain? 

What ISA clients are you using? (Firewall, SecureNAT, Web Proxy) All?

Are you caching passwords in IE? Try clearing the password cache.

Are you using the "Require all users to authenticate" option on the ISA Internal network web proxy listener? If so, don't use that option, require Authentication through your access rules.  

What authentication methods are configured on the Web Proxy? Basic, Integrated....etc?


RB


_____________________________

David Melvin
Ohio
MCSE: Security 2003, MCSA:Security 2003

(in reply to JJG323)
Post #: 2
RE: Error Code 407 Proxy Authentication required - 13.Jul.2009 4:45:45 PM   
pwindell

 

Posts: 2244
Joined: 12.Apr.2004
From: Taylorville, IL
Status: offline
One other possible to look at is if the user has recently changed their password and the user is logging in with a different DC thant he one ISA is usuing and something is causing theh DC to not replicate properly,...hence the ISA is using the DC that still considers the user to be using hte "old" password.

Just a shot in the dark.....

_____________________________

Phillip Windell

(in reply to Rotorblade)
Post #: 3
RE: Error Code 407 Proxy Authentication required - 20.Sep.2012 10:08:25 PM   
alireza_ostadi

 

Posts: 2
Joined: 29.Jan.2010
Status: offline
Hello dear friend to fix the problem
In Internet Explorer proxy server's IP instead of adding to the full length of the device name

(in reply to JJG323)
Post #: 4

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