Mr. Hinky Dink's PoTTY implements Bruce Leidl's obfuscated-openssh patch for the most popular Windows SSH client, Simon Tatham's PuTTY. PoTTY obfuscates the initial key exchange handshake to prevent detection by deep-packet inspection firewalls and intrusion detection/prevention systems (IDS/IPS). For a desrciption of the obfuscation process, read this. To leverage obfuscation, PoTTY requires, but does not supply, an obfuscated-openssh server to connect to. PoTTY also supports non-obfuscated OpenSSH servers.
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