Browse Prior Art Database

Distributed Resolution of Host IP Addresses for Isolated Networks

IP.com Disclosure Number: IPCOM000016268D
Original Publication Date: 2002-Oct-12
Included in the Prior Art Database: 2003-Jun-21
Document File: 4 page(s) / 81K

Publishing Venue

IBM

Abstract

Disclosed is a program used to manage IP Address information for remote networks (caused by Firewalls, Virtual Private Networks, etc) and eliminate the dependency on remote Domain Name System (DNS) servers for IP Address resolution. This program provides a method to: (a) to dynamically manage IP address information at the client workstation as opposed to a DNS server (e.g. "push data") (b) to enable users to pro-actively update IP address information (e.g. "pull data") (c) to allow users to send IP address information to others (e.g. "send data")

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Distributed Resolution of Host IP Addresses for Isolated Networks

Disclosed is a program used to manage IP Address information for remote networks (caused by Firewalls, Virtual Private Networks, etc) and eliminate the dependency on remote Domain Name System (DNS) servers for IP Address resolution. This program provides a method to:

(a) to dynamically manage IP address information at the client workstation as opposed to a DNS server (e.g. "push data")
(b) to enable users to pro-actively update IP address information (e.g. "pull data")
(c) to allow users to send IP address information to others (e.g. "send data")
(d) to automatically poll host servers to identify/retrieve IP Address updates.

The advent of complex, isolate networks environments has (in some cases) resulted in a dependency on DNS servers that reside in another subnet domain for IP address resolution. In other words, the client workstation resides in one domain and the target DNS server resides in another domain often behind a firewall. This can result in network connectivity issues when trying connect to a host server in the other domain because the IP address cannot be resolved.

For example, when a Lotus Notes user encounters this problem they receive the error "Unable to find path to server". Figure 1 illustrates the situation where the client workstation (in Subnet A) needs to access the Domino Server (in Subnet B). First the client workstation attempts to lookup the IP address via the local address file (or address book). The client then attempts to resolve the host address using the DNS, but is prevented by the Firewall. Eventually the application "times out" and the user receives an error.

Figure 1.

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To solve this problem, an application has been developed to eliminate the dependency on the remote DNS server for host address resolution. This Lotus Notes program automatically queries and pushes IP Address information to the client to remove the dependency on the DNS server. The purpose of this application is to provide simple method to create, manage, and distribute IP address information to client workstations without having to depend on a remote DNS for IP address resolution.

Using this program, updated IP Address information already resides on the client. So, when the user needs to connect the destination host server, the client (1) performs a local lookup to resolve the addres...