Method and apparatus to permit data transmission to traverse firewalls

摘要

Currently data transmission over the Internet between two client computers where both client computers are protected by firewalls is problematic, since firewalls block incoming packets. A method is provided for identifying the firewalls protecting a first client computer C 1 protected by a first NAPT or NAT firewall and a second client computer C 2 protected by a second NAPT or NAT firewall and allowing communications between the computers to traverse the first and the second firewalls.