Home page logo

basics logo Security Basics mailing list archives

Re: False (?) 401 errors messages
From: "Jon Mark Allen" <jonmark () allensonthe net>
Date: Wed, 17 Dec 2003 17:07:56 -0600

Chris Ess<securityfocus () cae tokimi net> 12/17/03 11:46:42 AM >>>

If I remember correctly...  And I may not...

Whenever a web browser hits a password-protected page and it does not have
a username and password for the page presented in the request header, it
will receive a 401 response.  It is this 401 response that prompts the web
browser to ask the user to enter the username and password for this site.

I don't know if you can do this, but...  In your error document for 401's,
query the username supplied.  If the username is blank or undefined then
it was an initial visit by a web browser and probably does not need to be
logged if you're trying to log attempts to log in with a username/password
pair.  So, if it does not need to be logged, you should not need to send
an email.

This may be of some use to you:


Chris Ess
System Administrator / CDTT (Certified Duct Tape Technician)

Yes, your memory serves you (and me) well.  Thanks.

However,  I followed the link to the PHP docs and it states that two AutoGlobal variables are created using PHP 
authentication called PHP_AUTH_USER and PHP_AUTH_PW (which store the obvious).  However, I'm not really using PHP 
authentication, and apparently (as I've tried every way I know how) those variables aren't set or I can't get access to 
them using only Apache Authentication.  Currently, I'm letting Apache handle the authentication routines and was hoping 
to only have to handle the exceptions.  I'd rather not code an entire PHP authentication suite for this...

So I guess my question now is: does Apache provide any header information or variables that could tell me if the user 
successfully authenticated?


Jon Mark


  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]