IP Library › Granted Patent US 7,451,234
Granted Patent B1
US 7,451,234 · App. 10/852,376 · Granted Nov 11, 2008

Systems and methods for updating dynamic IP addresses in a firewall using a DDNS server

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Quick Facts
Patent No.
US 7,451,234
App. No.
10/852,376
Granted
Nov 11, 2008
Kind
B1
Abstract

A DDNS server maintains a dynamic database of host names and IP addresses of remote devices connected to a telecommunications network. Devices on the telecommunications network query the DDNS server for the IP addresses of the remote devices. As the IP addresses change, a DDNS client captures the new IP address and transmits the changes to the DDNS server where the IP address of the remote device is updated.

Claims (8)

1. A method for dynamic updating of an IP router firewall using a DDNS server, comprising:

capturing, by a DDNS client attached to an HBS, a change in at least one HBS IP address;

notifying, upon a change in the at least one HBS IP address, a DDNS server of the at least one HBS IP address change;

transmitting, from the DDNS server to a subscriber register, a UDP notification indicating at least one HBS IP address change;

querying, by a firewall filter client, the subscriber register for the at least one changed HBS IP address;

comparing, at the firewall filter client, the at least one changed HBS IP address to an IP address filter list in the IP router firewall;

determining, at the firewall filter client, what items in the IP address filter list to alter; and

altering, at the IP router firewall, the IP address filter list with the at least one changed HBS IP address.