Secure shell is the primary means of access for a Linux or, Unix host. Many times attackers will not only use ports: 22, 222, 2222 as a means of identifying a remote system as a Linux / Unix flavor but also attempt to use variations of user names (admin, root, administrator, test, etc.) to hammer your SSH server in order to gain a foothold within your environment. This document helps address some of the security concerns when running SSH.

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