<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><br></div><div>Yes, that is exactly what I mean.</div><div><br></div><div>My VoIP carrier provides details of a /24 IP address range that they use on their side. Therefore all I need to do is filter those out at firewall level.<br></div><div><br></div><div>>Does the above mean to find out the ip of the SIP provider I use and only
authorising these ones?</div></div></body></html>