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 permitting packet based data transmission between a first computer protected by a first NAPT or NAT firewall and a second computer protected by a second NAPT or NAT firewall to traverse the first and the second firewalls. The method includes the first and second computers sending first and second data packets to a designated recipient computer. The designated recipient computer communicates the first external address from the first data packet to the second computer and also communicates the second external address from the second data packet to the first computer. The second computer subsequently sends a data packet to the first external address and the first computer sends a data packet to the second external address.