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SSH Server Hardening
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| # Add this in /etc/ssh/sshd_config.d/00-hardening.conf | |
| # Then type sudo service sshd reload | |
| Protocol 2 | |
| Port 2222 | |
| PermitRootLogin no | |
| MaxAuthTries 3 | |
| LoginGraceTime 20 | |
| PasswordAuthentication no | |
| PermitEmptyPasswords no | |
| ChallengeResponseAuthentication no | |
| KerberosAuthentication no | |
| GSSAPIAuthentication no | |
| X11Forwarding no | |
| PermitUserEnvironment no | |
| AllowAgentForwarding no | |
| AllowTcpForwarding no | |
| PermitTunnel no | |
| DebianBanner no | |
| AllowUsers *@192.168.0.0/16 | |
| HostKey /etc/ssh/ssh_host_ed25519_key | |
| HostKey /etc/ssh/ssh_host_rsa_key | |
| KexAlgorithms [email protected] | |
| Ciphers [email protected],[email protected],[email protected],aes256-ctr,aes192-ctr,aes128-ctr | |
| MACs [email protected],[email protected],[email protected] |
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