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How do you block SSH and FTP Access to IP or Network Range?

Typically we all use SSH and FTP services often to access the remote servers and virtual private servers. As a Linux administrator, you must aware about how to block SSH and FTP access to specific IP or network range in Linux in order to tighten the security bit more. This tutorial will show you how to block SSH and FTP access to a particular IP address and/or a network range in CentOS 6 and 7 server.