[user@server ~]# netstat -naptu | grep asterisk tcp 0 0 0.0.0.0:2000 0.0.0.0:* LISTEN 9231/asterisk udp 0 0 0.0.0.0:2727 0.0.0.0:* 9231/asterisk udp 0 0 0.0.0.0:4520 0.0.0.0:* 9231/asterisk udp 0 0 xx.yy.zz.ww:5060 0.0.0.0:* 9231/asterisk udp 0 0 0.0.0.0:4569 0.0.0.0:* 9231/asterisk Hi, My asterisk server is listening to the above ports. would somebody explain, what ports are for what. Is there any security issue with these ports? what firewall messure you do regarding these open ports? Thanks