Appeal 2007-1063
Application 09/881,594
We affirm.
Appellant’s invention relates to communication between a device
protected by a firewall and network address translator (NAT), and another
device located on the outside of the firewall and NAT. Because the firewall
rejects unsolicited communications from outside devices, the invention
contemplates that communication originates from the device protected by
the firewall. A communications path is set up through the firewall, and so-
called “keep-alive” messages are transmitted to maintain that
communications path.
Claim 1 is exemplary:
1. A method for use in communications involving a first
terminal that is coupled to one side of a firewall and network address
translator, the method comprising:
sending, by the first terminal, a message identifying the first
terminal to a node on another side of the firewall and network address
translator;
receiving, by the first terminal, another message from the node,
wherein the messages between the first terminal and the node causes
creation of a path through the firewall and network address translator;
and
repeatedly sending keep-alive messages to maintain the path
through the firewall and network address translator.
2 Claims 7, 32 and 37 were canceled in the Reply Brief filed October 10,
2006.
2
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