[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [FW-1] [fw-1] Instant Messenger bypass FW-1
We are in the process of changing operating systems on all our PCs and I am going to seriously attempt to just block my users from installing software on their PCs. The theory being of course that if they can't install anything, they can't put IM clients or any of the other various and sundry useless, time wasting, PC eating garbage they are so fond of. I just wonder if anyone else has managed this and how effective it has been. Jim Edwards -----Original Message----- From: Rocky Stefano [mailto:[email protected]] Sent: Wednesday, June 12, 2002 9:43 AM To: [email protected] Subject: Re: [FW-1] [fw-1] Instant Messenger bypass FW-1 This has long been a known problem. Its not a vulnerability with any firewall. There are several methods available to stop IM's from getting out of your network. -----Original Message----- From: A, Kaustubh [mailto:[email protected]] Sent: June 12, 2002 9:05 AM To: [email protected] Subject: [FW-1] [fw-1] Instant Messenger bypass FW-1 Folks, I came to know about an article of Gartner saying that their are some IM bypassing Firewall by scanning open ports. Has anybody tested this CP FW-1 NG? I am afraid if this is a problem with FW-1!!! Firewall Bypass Technology AOL's Instant Messenger has a uniquely slippery client that is designed to bypass firewall port blocking technology, making the product easy to configure from behind a firewall. For example, the AOL client will use any available port, scanning even those reserved for domain naming system (DNS) lookup. This technology enables unsophisticated users to sneak past a firewall with relative ease, effectively establishing breaches in the corporate firewall. Kaustubh A. Technical Consultant HP Services ---------------------------------------------------------------------------- ------- 101-105 Enterprise Center, CTS#55 Off Neharu Road, Vile Parle (East) Mumbai 400099. *+91 (0) 22.616.7331 *GSM:*: [email protected] URL: http://www.ho.com/in ---------------------------------------------------------------------------- ------- ================================================= To set vacation, Out Of Office, or away messages, send an email to [email protected] in the BODY of the email add: set fw-1-mailinglist nomail ================================================= To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html ================================================= If you have any questions on how to change your subscription options, email [email protected] ================================================= ================================================= To set vacation, Out Of Office, or away messages, send an email to [email protected] in the BODY of the email add: set fw-1-mailinglist nomail ================================================= To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html ================================================= If you have any questions on how to change your subscription options, email [email protected] ================================================= ================================================= To set vacation, Out Of Office, or away messages, send an email to [email protected] in the BODY of the email add: set fw-1-mailinglist nomail ================================================= To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html ================================================= If you have any questions on how to change your subscription options, email [email protected] =================================================
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