.

2026-08-22 12:49:53 +02:00 · 2026-01-27 17:35:45 -05:00
commit 2639af6531
176 changed files with 27104 additions and 0 deletions
@@ -0,0 +1,111 @@
+# SSH Server Hardening Configuration
+# Place in /etc/ssh/sshd_config.d/hardening.conf
+# Restart SSH: systemctl restart sshd
+
+#------------------------------------------------------------------------------
+# AUTHENTICATION
+#------------------------------------------------------------------------------
+
+# Disable root login
+PermitRootLogin no
+
+# Disable password authentication
+PasswordAuthentication no
+
+# Enable public key authentication
+PubkeyAuthentication yes
+
+# Disable empty passwords
+PermitEmptyPasswords no
+
+# Disable keyboard-interactive authentication
+KbdInteractiveAuthentication no
+
+# Disable challenge-response authentication
+ChallengeResponseAuthentication no
+
+# Maximum authentication attempts
+MaxAuthTries 3
+
+# Maximum sessions per connection
+MaxSessions 2
+
+# Maximum simultaneous unauthenticated connections
+MaxStartups 10:30:60
+
+# Login grace time
+LoginGraceTime 60
+
+#------------------------------------------------------------------------------
+# SESSION
+#------------------------------------------------------------------------------
+
+# Client alive settings (timeout)
+ClientAliveInterval 300
+ClientAliveCountMax 2
+
+# Disable TCP forwarding
+AllowTcpForwarding no
+
+# Disable agent forwarding
+AllowAgentForwarding no
+
+# Disable stream local forwarding
+AllowStreamLocalForwarding no
+
+# Disable X11 forwarding
+X11Forwarding no
+
+# Disable user environment processing
+PermitUserEnvironment no
+
+# Disable tunnel device forwarding
+PermitTunnel no
+
+# Disable gateway ports
+GatewayPorts no
+
+#------------------------------------------------------------------------------
+# CRYPTOGRAPHY
+#------------------------------------------------------------------------------
+
+# Protocol version (SSH-2 only)
+Protocol 2
+
+# Strong ciphers only
+Ciphers aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr
+
+# Strong MACs only
+MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512,hmac-sha2-256
+
+# Strong key exchange algorithms
+KexAlgorithms curve25519-sha256,curve25519-sha256@libssh.org,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512
+
+# Strong host key algorithms
+HostKeyAlgorithms ssh-ed25519,rsa-sha2-512,rsa-sha2-256
+
+#------------------------------------------------------------------------------
+# LOGGING
+#------------------------------------------------------------------------------
+
+# Log level
+LogLevel VERBOSE
+
+# Enable sftp logging
+Subsystem sftp /usr/lib/openssh/sftp-server -l INFO
+
+#------------------------------------------------------------------------------
+# ACCESS CONTROL
+#------------------------------------------------------------------------------
+
+# Use PAM
+UsePAM yes
+
+# Show banner
+Banner /etc/issue.net
+
+# Restrict to specific users (uncomment and customize)
+# AllowUsers admin deploy
+
+# Restrict to specific groups (uncomment and customize)
+# AllowGroups sshusers admins