I agree with you...but a simpler way is to block the specific hosts names which host the messenger service. e.g. you can block
scsa.msg.yahoo.com scsb.msg.yahoo.com scsc.msg.yahoo.com to completely stop yahoo messenger. I don't know abt MSN messenger...but you can do a packet capture to find it out. Regards Zuhair. ----- Original Message ----- From: "Shantanu Kumar" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, November 15, 2002 9:10 PM Subject: Re: [LIH]block yahoo and msn messenger > When someone uses MSN or Yahoo! on any of the clients, (s)he first > connects to the proxy-server on a fixed proxy-hosted port, but > requesting to connect further to a different (messenger-service) > port. If you blocked incoming ports on the proxy, this will have > no effect. Probably outgoing connections (TCP as well as UDP) have > to be selectedly blocked on the proxy. Or a better technique (on > the proxy) may be to discard all connection-requests other than > ports for essential services like HTTP, FTP, SMTP, POP, SMB, NMB > etc (since sites use to host messenger-service on multile ports > too). > > This reply may not be thoroughly helpful, but again, discussions > are never too bad. :-) > > Shantanu > > __________________________________________________________ > Give your Company an email address like > ravi @ ravi-exports.com. Sign up for Rediffmail Pro today! > Know more. http://www.rediffmailpro.com/signup/ > > > > ------------------------------------------------------- > This sf.net email is sponsored by: To learn the basics of securing > your web site with SSL, click here to get a FREE TRIAL of a Thawte > Server Certificate: http://www.gothawte.com/rd524.html > _______________________________________________ > linux-india-help mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/linux-india-help > > ------------------------------------------------------- This sf.net email is sponsored by: To learn the basics of securing your web site with SSL, click here to get a FREE TRIAL of a Thawte Server Certificate: http://www.gothawte.com/rd524.html _______________________________________________ linux-india-help mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/linux-india-help
