Hello Users, If I Keep the Router , My openser is Not working fine. But If place it Directly to modem, it works Kool and Fine. Actually My router is Firewall router which does have the NAT configuring , It was NetGear.. Can tell Which Router I need to Use for My Sip Server...... -- Thanks and Regards Ravi Prakash Sunkara ravi.sunkara(a)hyperion-tech.com M:+91 9985077535 O:+91 40 23114549 F:+91 40 40208727 ravi.sunkara(a)hyperion-tech.com www.hyperion-tech.com