Brian, Encrypted SIP messages can be sent using TLS. However, I don't think it is realistic to expect everyone calling you to have a public/private key pair. Cryptographic solutions have been suggested for email spams also but they have been found to be ineffective because of scalability problems.
I looking for a spam control solution that avoids cryptography (I prefer non-cryptographic solutions but I am open to new ideas). Thanks, Tom. --- Brian Cuthie <[EMAIL PROTECTED]> wrote: > Tom Green wrote: > > >Hi, > > > >Some people have suggested maintaining black lists > and > >white lists to avoid spammers and allow legitimate > >callers into the network. However, the problem with > >this method is that the spammer's IP address might > >change due to DHCP. Today a spammer might get > >aaa.bbb.ccc.ddd and lets say that I put this > address > >in my blacklist. To my annoyance, tomorrow a > >legitimate caller might get aaa.bbb.ccc.ddd and the > >spammer might get a different IP address. In the > end, > >I end up blocking the legitimate caller also. Any > >ideas or thoughts to on this problem is > appreciated. > > > >Thanks, > >Tom > > > > > > > > > >__________________________________ > >Do you Yahoo!? > >Yahoo! Tax Center - File online by April 15th > >http://taxes.yahoo.com/filing.html > >_______________________________________________ > >Asterisk-Users mailing list > >[EMAIL PROTECTED] > >http://lists.digium.com/mailman/listinfo/asterisk-users > >To UNSUBSCRIBE or update options visit: > > > http://lists.digium.com/mailman/listinfo/asterisk-users > > > > > Yeah, for a relatively modern protocol SIP has some > surprisingly glaring > omissions, such as: > > - certificate based authentication > - encryption > - NAT-awareness > > -brian > _______________________________________________ > Asterisk-Users mailing list > [EMAIL PROTECTED] > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users __________________________________ Do you Yahoo!? Yahoo! Tax Center - File online by April 15th http://taxes.yahoo.com/filing.html _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
