diff --git a/_posts/2017-11-20-hardening-openssh-all-in-one-place.md b/_posts/2017-11-20-hardening-openssh-all-in-one-place.md
index 9fbf80e..26913bb 100644
--- a/_posts/2017-11-20-hardening-openssh-all-in-one-place.md
+++ b/_posts/2017-11-20-hardening-openssh-all-in-one-place.md
@@ -28,9 +28,6 @@ HostKey /etc/ssh/ssh_host_ed25519_key
 
 UsePrivilegeSeparation yes
 
-KeyRegenerationInterval 3600
-ServerKeyBits 1024
-
 SyslogFacility AUTH
 LogLevel INFO
 
@@ -44,7 +41,6 @@ PubkeyAuthentication yes
 PasswordAuthentication yes
 
 IgnoreRhosts yes
-RhostsRSAAuthentication no
 HostbasedAuthentication no
 
 PermitEmptyPasswords no
@@ -64,7 +60,7 @@ Subsystem sftp /usr/lib/openssh/sftp-server
 
 UseDNS yes
 UsePAM yes
-AllowGroup ssh
+AllowGroups ssh
 MaxAuthTries 3
 
 KexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256