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20 Linux Server Hardening Security Tips

20 Linux Server Hardening Security Tips

#1: Encrypt Data Communication

#2: Minimize Software to Minimize Vulnerability

#3: One Network Service Per System or VM Instance

#4: Keep Linux Kernel and Software Up to Date

#5: Use Linux Security Extensions

#6: User Accounts and Strong Password Policy

#7: Disable root Login

#8: Physical Server Security

#9: Disable Unwanted Services

#10: Delete X Windows

#11: Configure Iptables and TCPWrappers

#12: Linux Kernel /etc/sysctl.conf Hardening

#13: Separate Disk Partitions

#14: Turn Off IPv6

#15: Disable Unwanted SUID and SGID Binaries

#16: Use A Centralized Authentication Service

#17: Logging and Auditing

#18: Secure OpenSSH Server

#19: Install And Use Intrusion Detection System

#20: Protecting Files, Directories and Email