in ISA2004/2006 users only restrict via IP and username/Passwords bcuz ISA is layerIII firewall.....my wish for users(specially SecureNAT) who behind ISA can authenticate
1.) Combination of IP+MAC authentication OR 2.) Combination of username+Mac authentication OR 3.) if via username/password than username password cant use simanteously at other PC OR 4.) behind ISA users dial via diap-up to ISA and than authenticate. OR some thing new with more combination which can be accessable for a smart ISA users who are behind(specially SecureNat)