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Definition Edit

Tunneling is

a technique to encapsulate one communication data stream inside of another, in order to extend the advantages of the latter to the former. Attackers will often tunnel a network protocol that would not be allowed to cross network boundaries inside of another that is allowed, defeating perimeter defenses.
[a] method for circumventing a firewall by hiding a message that would be rejected by the firewall inside a second, acceptable message.[1]

Overview Edit

Typically, insecure, unencrypted traffic is tunneled within an encrypted connection. The normal services on the user’s computer are available, but run through the tunnel to the non-filtered computer which forwards the user’s requests and their responses transparently.

References Edit

  1. Practices for Securing Critical Information Assets, Glossary, at 58.

See also Edit

External resource Edit

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