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407 Auth Required

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407 Auth Required - 13.Oct.2009 6:17:04 AM   
chrismyerz

 

Posts: 2
Joined: 13.Oct.2009
Status: offline
Hi,

Some of my client pcs running IE 7 are having a strange problem when using the ISA 2004 proxy (as proxy client).

Proxy settings are configured via GPO - using the hostname as the proxy address (e.g. PROXYSERVER) port 80

ISA rule is configured to allow All Auth'd users Web access via proxy.

The problem with some of the pcs, is that they get a prompt for credentials, which the correct DOMAIN\Username & password are supplied, 3 or 4 times and then a Network Access Message stating that Authentication is required Error 407 etc.

Looking at the ISA logs, it seems that the IE client is trying to auth anonymously.

However if I change the proxy settings in IE to the proxy servers IP address (or add an entry to the hosts file, same HOSTNAME and IP). it works fine!!

DNS/WINS is working ok as the traffic hits the ISA server in the first failed anon attempt.

Any ideas??
Post #: 1
RE: 407 Auth Required - 13.Oct.2009 11:04:43 AM   
Rotorblade

 

Posts: 1348
Joined: 27.Feb.2007
Status: offline
quote:


Proxy settings are configured via GPO - using the hostname as the proxy address (e.g. PROXYSERVER) port 80



Port 80? Did you mean: 8080?

Try using the FQDN of the proxy server. It could be that your ISA NIC bindings are not properly ordered?

http://www.isaserver.org/tutorials/Configuring_ISA_Server_Interface_Settings.html

HTH

RB

_____________________________

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

(in reply to chrismyerz)
Post #: 2

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