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--- os:linux:ssh [2022/07/02 12:47] – [References] warnaud
+++ os:linux:ssh [2024/02/20 11:51] (current) – [References] warnaud
@@ Line 1: / Line 1: @@
+====== SSH config ======
+<code bash> vi /etc/ssh/sshd_config</code>
+====== Key only access ======
+===== Root =====
+<code perl>
+PermitRootLogin prohibit-password
+</code>
+===== User =====
+<code perl>
+PasswordAuthentication no
+RSAAuthentication yes
+PubkeyAuthentication yes
+</code>
+===== Specific to user =====
+<code perl>
+Match User alice,bob,john
+PasswordAuthentication no
+</code>
+====== Deny User access ======
+<code perl>
+DenyUsers johnd admin nagios
+</code>
+====== Deny Groups access ======
+<code perl>
+DenyGroups wheel adm video apache
+</code>
+====== Deny User access ======
+<code perl>
+Deny Users johnd admin nagios
+</code>
+====== Disable IPv6 ======
+<code perl>
+Address Family inet
+</code>
+====== Set Modifications ======
+<code bash> systemctl restart sshd</code>
+====== References ======
+  * https://tecadmin.net/deny-allow-access-for-users-and-groups-in-openssh/
+  * https://www.xmodulo.com/how-to-force-ssh-login-via-public-key-authentication.html
+  * https://blog.stephane-robert.info/docs/securiser/durcissement/ssh/