Re: Blocking Instant Messaging Programs
- From: "Jim in Arizona" <tiltowait@xxxxxxxxxxx>
- Date: Wed, 8 Jun 2005 15:03:30 -0700
"Bobby Mir" <bam@xxxxxxxxxxxxxxx> wrote in message
news:%23%23nvpdEbFHA.3040@xxxxxxxxxxxxxxxxxxxxxxx
> Hi there,
>
> I am trying to block the use of AOL Instant Messenger, MSN Messenger,
> Yahoo
> Messenger, and ICQ (the top 4 used instant messaging clients used on our
> network). We've got an ISA 2000 Server set up. I am interested in
> knowing
> how blocking these can be done on the server side, i.e. not having
> anything
> to do with client machines. Blocking the web based versions of these is
> not
> so hard, as that can be implemented in the restricted destinations...same
> thing applies to web based email (Hotmail, Yahoo, AOL, Gmail, etc). We
> are
> not interested in using the ISA Firewall as that has to be used on client
> machines as well. Is there any other way this can be done such as
> blocking
> relevant ports? Does anyone know these ports or port ranges or where I
> can
> go to have this done? Any help and recommendations would be apprecaited.
>
> Thanks in advance,
>
> Bobby
>
Have you looked at your protocol rules under Access Policy. Create a new
rule, choose deny, then selected protocols. You'll see that AOL IM, ICQ amd
MSN are already in there.
You can create a new IP Protocol in Plolicy Elemenets --> Protocol
Definitions. This article describes the ports for the various big IM clients
out there:
http://www.technicalinfo.net/papers/IMSecurity.html
Yahoo is port 5050.
HTH,
Jim
.
- References:
- Blocking Instant Messaging Programs
- From: Bobby Mir
- Blocking Instant Messaging Programs
- Prev by Date: Re: ISA 2004 Caching Issues
- Next by Date: Re: ISA 2004 Caching Issues
- Previous by thread: Blocking Instant Messaging Programs
- Next by thread: Re: Blocking Instant Messaging Programs
- Index(es):
Relevant Pages
|
