From memory, Bb already does that.
You also need to make sure that the expire is set at the http level, and of
course Bb resets this to off whenever it rebilds the site.
Thanks
Ray
-----Original Message-----
From: Blackboard/Courseinfo userslist
[mailto:[log in to unmask]] On Behalf Of Shamsi, Aoun
Sent: 16 November 2004 11:59
To: [log in to unmask]
Subject: Re: Session Hijacking
If it's caching on the proxy somewhere would it not be easy to expire the
pages in html by adding the following lines inside the <HEAD></HEAD> tags...
<!--- meta anti cache --->
<META HTTP-EQUIV="Expires" CONTENT="Mon, 06 Jan 1990 00:00:01 GMT"> <META
HTTP-EQUIV="Pragma" CONTENT="no-cache"> <META HTTP-EQUIV="Cache-Control"
CONTENT="no-cache">
This should cause the files to expire immediately and hence a new file
request occurring on every click. Or am I missing the point?
Regards
Aoun
==
Aoun Shamsi
e: [log in to unmask]
There are 10 types of people in the world, those who can read binary and
those who can't.
-----Original Message-----
From: Blackboard/Courseinfo userslist
[mailto:[log in to unmask]] On Behalf Of Katie Herson
Sent: 16/11/2004 11:52
To: [log in to unmask]
Subject: Re: [BLACKBOARD-USERGROUP] Session Hijacking
We've experienced this at the University of Brighton.
We've narrowed down, that in our case, it seems to only happen for our users
based on hospital sites, and it is to do with the NHS Net having caching
enabled on their proxy (BT are the NHS Net providers, and we are waiting for
them to exclude our Blackboard URL from their internet cache). Blackboard
report that this problem is on their Engineering top 10 list. It seems to
happen a lot with users connecting through BT.
Katie
--
Katie Herson
Learning Technologies
University of Brighton
-----Original Message-----
From: Blackboard/Courseinfo userslist
[mailto:[log in to unmask]] On Behalf Of Jannetta Lewis
Sent: 16 November 2004 10:44
To: [log in to unmask]
Subject: Session Hijacking
Hi All
I was just wondering whether anybody else was experiencing this problem.
I call it session hijacking. What appears to happend is that while you are
logged into Blackboard, you suddenly take over somebody else's session, that
is logged into Blackboard at the same time. So, if you are logged in as
John, you suddenly become Jane, with access to all Jane's courses etc. You
loose your own session and have to log out and back in, at which time you
have logged Jane out too.
We have logged the problem with Blackboard, but it has been going on for
months. Apparently other institutions are also experiencing the problem and
we were just wondering who and whether anybody has found a temporary
work-around.
Regards
Jannetta
====
New College Durham
Product Development Co-ordinator
X4434
"Time is an illusion. Lunchtime doubly so." (Ford Prefect) "The difference
between genius and stupidity is genius has its limits"
(Albert Einstein)
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