New to SIP, VoIP and Ekiga

"Saul A. Peebsen" <[email protected]> Sat, 28 May 2016 11:39:46 -0500
Newsgroups gmane.comp.gnome.apps.gnomemeeting
Message-ID <[email protected]>
I installed Ekiga. I forwarded ports 5000-5100 to my desktop.
Everything was fine until I started receiving ghost calls from ID 1000,
2002, so on, bogus ones. It went so bad I had to terminate Ekiga, my PC
was ringing all the time.

What can be done to block these ghost calls?

-- 
Cheers, Saul