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Protect SSH from brute force attacks with pam_abl
Practically all Unix and Linux servers run an SSH service to let administrators connect securely from remote locations. Unfortunately for security administrators, attacks on SSH services are popular today. In this article I'll show you how can you protect machines running SSH services from brute force attacks using the pam_abl plugin for SSH pluggable authentication modules (PAM).
You can download and compile the pam_abl module yourself, or you can download and install a binary package from a repository. If you want to compile the module, download the source and look for information on how to compile it on the pam_abl homepage.
At Linux.com
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