Optimizing Tunneled Grid Connectivity Across Firewalls

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Executive Summary

Grids today generally assume that concurrent network connections are possible among many processors attached to high-capacity networks. However, inter-network boundaries dividing independent institutions often have firewalls, typically to restrict how many and which ports are accessible. In some cases, ports are opened indefinitely for Grid applications, but this compromises security significantly. On the other hand, solutions that manage port openings in an ad-hoc manner for applications are non-trivial to implement. An alternative firewall traversal technique is required that will provide manageable openings with less complexity involved. This is possible through proxies and managed tunnels using ports already authorized across the firewalls.

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