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Linux => Server Security & Hardening => Topic started by: rohitj on December 28, 2013, 10:40:05 pm

Title: Secure your SSH
Post by: rohitj on December 28, 2013, 10:40:05 pm

Secure SSH in your Server

Please change the below configurations in ssh configuration file (/etc/ssh/sshd_config) order to secure your SSH.

1) Only Use SSH Protocol 2

Code: [Select]

Protocol 2
SSH protocol version 1 (SSH-1) has man-in-the-middle attacks problems and security vulnerabilities.

2) Only allow particular users

Code: [Select]

AllowUsers user1 user2
3) Configure Idle Log Out Timeout Interval

Code: [Select]

ClientAliveInterval 300
ClientAliveCountMax 0
4) Disable .rhosts Files

Code: [Select]

IgnoreRhosts yes
5)  Disable Host-Based Authentication

Code: [Select]

HostbasedAuthentication no
6) Disable root Login via SSH

Code: [Select]

PermitRootLogin no
7) Change SSH Port and Limit IP Binding

Code: [Select]

Port 300
ListenAddress 192.168.*.*
ListenAddress 202.54.*.*
Done   :D