If you are using a Debian/Ubuntu Linux based server, try apt-get command/ apt command to remove insecure services: # yum erase xinetd ypserv tftp-server telnet-server rsh-server Type the following yum command to delete NIS, rsh and other outdated service: The common solution to this problem is to use either OpenSSH, SFTP, or FTPS (FTP over SSL), which adds SSL or TLS encryption to FTP. Under most network configurations, user names, passwords, FTP / telnet / rsh commands and transferred files can be captured by anyone on the same network using a packet sniffer. Avoid Using FTP, Telnet, And Rlogin / Rsh Services on Linux How to configure Nginx with free Let’s Encrypt SSL certificate on Debian or Ubuntu Linux 2.Apache SSL (Secure Server Layer) Https (mod_ssl) Configuration And Installation.Lighttpd SSL (Secure Server Layer) Https Configuration And Installation.Another option is to try out tinc that uses tunneling and encryption to create a secure private network between hosts on the Internet or private insecure LAN. OpenVPN is a cost-effective, lightweight SSL VPN.GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as access modules for all kind of public key directories.You can also mount remote server file system or your own home directory using special sshfs and fuse tools. Use scp, ssh, rsync, or sftp for file transfer.Encrypt transmitted data whenever possible with password or using keys / certificates. Encrypt Data Communication For Linux ServerĪll data transmitted over a network is open to monitoring. The following instructions assume that you are using CentOS/RHEL or Ubuntu/Debian based Linux distribution. Linux Server Hardening Security Tips and Checklist
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