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Securing your Linux server is important to protect your data, intellectual property, and time, from the hands of crackers (hackers). The system administrator is responsible for security Linux box. In this first part of a Linux server security series, I will provide 20 hardening tips for default installation of Linux system. #1: Encrypt Data Communication All data transmitted over a network is open to monitoring. Encrypt transmitted data whenever possible with password or using keys / certificates. Use scp, ssh, rsync, or sftp for file transfer. You can also mount remote server file system or your own home directory using special sshfs and fuse tools. GnuPG allows to encrypt and sign your data and communication, features a versatile key managment system as well as access modules for all kind of public key directories. Fugu is a graphical frontend to the commandline Secure File Transfer application (SFTP). SFTP is similar to FTP, but unlike
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Despite the advancements in interoperability between file systems, and the availability of file sharing services nowadays, hosting your own FTP server still offers advantages. FTP is easy to set up and use, and any files transferred via FTP stay securely within your network. With ProFTPD server, you can allow users to share files, and even allow people outside the corporate firewall to send files to you, easily and securely. As an FTP server, ProFTPD offers several advantages. For starters it’s controlled by a single configuration file. If you have configured an Apache web server (and what admin hasn’t) you’ll be at home with ProFTPD’s configuration file. It’s also lightweight and modular, meaning you can add extensions to it, for example to encrypt file transfers, or hook it up with a directory server. The server is available in the official software repositories of all major distributions,
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