diff --git a/source/openssh-server/index.rst b/source/openssh-server/index.rst
new file mode 100644
index 0000000..af4c650
--- /dev/null
+++ b/source/openssh-server/index.rst
@@ -0,0 +1,78 @@
+##############
+OpenSSH server
+##############
+
+*********
+Configure
+*********
+
+* /etc/ssh/moduli
+
+Generate usable prime numbers pool.
+
+.. warning::
+
+  These are **VERY** long operations!
+
+.. code:: shell
+
+  ssh-keygen -b 4096 -G 4096.G
+  ssh-keygen -f 4096.G -T moduli
+
+* /etc/ssh/ssh_host_*_key
+
+types: rsa/ed25519/…?
+
+.. code:: shell
+
+  ssh-keygen -b 4096 -f /etc/ssh/ssh_host_rsa_key
+
+* /etc/ssh/sshd_config
+
+::
+
+  # daemon
+  AllowTcpForwarding yes
+  ClientAliveInterval 30
+  Compression no
+  HostKey /etc/ssh/ssh_host_rsa_key
+  IgnoreRhosts yes
+  LogLevel INFO
+  MaxStartups 16:32:64
+  PermitTunnel no
+  Port 22
+  Protocol 2
+  Subsystem sftp internal-sftp
+  TCPKeepAlive yes
+  UseDNS no
+  UseLogin no
+  UsePAM yes
+  X11Forwarding no
+
+  # authentication
+  AuthorizedKeysFile .ssh/authorized_keys
+  ChallengeResponseAuthentication no
+  Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes256-ctr
+  HostbasedAuthentication no
+  KexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256
+  LoginGraceTime 60
+  MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256
+  PasswordAuthentication no
+  PermitEmptyPasswords no
+  PermitRootLogin without-password
+  PubkeyAuthentication yes
+  StrictModes yes
+  UsePrivilegeSeparation sandbox
+
+  # prompt
+  Banner none
+  DebianBanner no
+  PrintLastLog yes
+  PrintMotd no
+  VersionAddendum none
+
+* authorized_keys
+
+::
+
+  TODO
diff --git a/source/security.rst b/source/security.rst
index c4ae72d..b53d51c 100644
--- a/source/security.rst
+++ b/source/security.rst
@@ -6,4 +6,5 @@ Security
    :maxdepth: 2
 
    openssh-client/index
+   openssh-server/index
    openssl/index