Real-time media communications over firewalls using a control protocol
First Claim
Patent Images
1. An apparatus comprising:
- a controller to specify a filtering characteristic based on a control protocol from a call server serving a firewall between a source network and a destination networks; and
a filter coupled to the controller to filter a packet in a call transmitted from the source network based on the filtering characteristic, the filter accepting the packet if the packet satisfies the filtering characteristic and rejecting the packet otherwise.
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Abstract
In one embodiment of the invention, a real-time firewall processor includes a controller and a filter. The controller specifies a filtering characteristic based on a control protocol from a call server serving a firewall between a source and a destination networks. The filter is coupled to the controller to filter a packet in a call transmitted from the source network based on the filtering characteristic, the filter accepting the packet if the packet satisfies the filtering characteristic and rejecting the packet otherwise.
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Citations
52 Claims
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1. An apparatus comprising:
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a controller to specify a filtering characteristic based on a control protocol from a call server serving a firewall between a source network and a destination networks; and
a filter coupled to the controller to filter a packet in a call transmitted from the source network based on the filtering characteristic, the filter accepting the packet if the packet satisfies the filtering characteristic and rejecting the packet otherwise. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method comprising:
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specifying a filtering characteristic based on a control protocol from a call server serving a firewall between a source network and a destination network;
filtering a packet in a call transmitted from the source network based on the filtering characteristic; and
accepting the packet if the packet satisfies the filtering characteristic, and rejecting the packet otherwise. - View Dependent Claims (14, 15, 16, 19, 20, 21, 22, 23, 24)
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- 17. The method of 14 wherein the modifying action is one of an address swapping, a port swapping, and a protocol conversion.
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25. A computer program product comprising:
a machine useable medium having computer program code embedded therein, the computer program product having;
computer readable program code to specify a filtering characteristic based on a control protocol from a call server serving a firewall between a source network and a destination network; and
computer readable program code to filter a packet in a call transmitted from the source network based on the filtering characteristic; and
computer readable program code to accept the packet if the packet satisfies the filtering characteristic and rejecting the packet otherwise. - View Dependent Claims (26, 27, 28, 31, 32, 33, 34, 35, 36)
- 29. The computer program product of 26 wherein the modifying action is one of an address swapping, a port swapping, and a protocol conversion.
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37. A system comprising:
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a source network and destination network;
an application firewall coupled to the source and destination networks; and
a real-time firewall coupled to the source and destination networks to process real-time packets, the real-time fire-wall comprising;
a controller to specify a filtering characteristic based on a control protocol from a call server serving a firewall between the source and the destination networks, and a filter coupled to the controller to filter a packet in a call transmitted from the source network based on the filtering characteristic, the filter accepting the packet if the packet satisfies the filtering characteristic and rejecting the packet otherwise. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. An apparatus comprising:
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a controller to specify a filtering characteristic based on a control protocol from a call server serving a firewall between a source and a destination networks;
a filter coupled to the controller to filter a packet in a call transmitted from the source network based on the filtering characteristic, the filter accepting the packet if the packet satisfies the filtering characteristic and rejecting the packet otherwise; and
a modifier coupled to the controller and the filter to modify the accepted packet based on a modifying action, the modified packet being sent to the destination network. - View Dependent Claims (50, 51, 52)
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Specification