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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [FW-1] Instant Messenger bypass FW-1
ISS wrote a very nice whitepaper about the major IM programs, how they work, what their exposures are and how to stop them. Reccommended reading.. hth Joe www.iss.net >>> "A, Kaustubh" <[email protected]> 06/12/02 10:42AM >>> > 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] ================================================= ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.com ********************************************************************** ================================================= 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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