Hi Chris, ISA Server doesn't pass multicast traffic, so you're in good shape. HTH, Tom Thomas W Shinder www.isaserver.org/shinder ISA Server and Beyond: http://tinyurl.com/1jq1 Configuring ISA Server: http://tinyurl.com/1llp -----Original Message----- From: Chris H [mailto:ntpro@xxxxxxxxxx] Sent: Wednesday, March 19, 2003 3:48 PM To: [ISAserver.org Discussion List] Subject: [isalist] Off Topic -- Multicasting http://www.ISAserver.org Does anyone know of a good way to filter out multicast traffic that seems to be drowning 2 of my terminal servers? 224.0.0.0 has been added to their route tables and cannot be deleted. An they seem to continue to get hit by 224.0.1.22 and 224.0.1.35 which resolves to svrloc.mcast.net which from what I have found is a Microsoft multicast group advertisement? But I cannot pin down the source and for some reason it is only hitting my 2 terminal servers out of 70 servers on the same subnet. I cannot seem to find anywhere on networking properties to configure or enable/disable multicasting group memberships . . . Any help is greatly appreciated. Chris ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Exchange Server Resource Site: http://www.msexchange.org/ Windows Security Resource Site: http://www.windowsecurity.com/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: tshinder@xxxxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')