# {{ ansible_managed }}


# Networking
Port 22

TCPKeepAlive yes


# Key exchange
#KexAlgorithms curve25519-sha256@libssh.org,
#              diffie-hellman-group-exchange-sha256
KexAlgorithms curve25519-sha256@libssh.org


# Server authentication
Protocol 2
HostKey /etc/ssh/ssh_host_ed25519_key

# Not available in openssh 6.7
# HostKeyAlgorithms ssh-ed25519-cert-v01@openssh.com,ssh-ed25519

# Client authentication
PasswordAuthentication no
ChallengeResponseAuthentication no
PubkeyAuthentication yes

# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
UsePAM yes


# User Authentication
AllowUsers {{ sshd_allow_users|join(' ') }}
AllowGroups {{ sshd_allow_groups|join(' ') }}
PermitRootLogin without-password

LoginGraceTime 120

StrictModes yes

# Not available in openssh 6.7
# PubkeyAcceptedKeyTypes ssh-ed25519-cert-v01@openssh.com,ssh-ed25519


# Symmetric ciphers
#Ciphers chacha20-poly1305@openssh.com,
#        aes256-gcm@openssh.com,
#        aes128-gcm@openssh.com,
#        aes256-ctr,
#        aes192-ctr,
#        aes128-ctr
Ciphers chacha20-poly1305@openssh.com


# Message authentication codes
#MACs hmac-sha2-512-etm@openssh.com,
#     hmac-sha2-256-etm@openssh.com,
#     hmac-ripemd160-etm@openssh.com,
#     umac-128-etm@openssh.com,
#     hmac-sha2-512,
#     hmac-sha2-256,
#     hmac-ripemd160,
#     umac-128@openssh.com
MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com


# Allow client to pass locale environment variables
AcceptEnv LANG LC_*

PrintMotd no

# sftp (required by ansible)
Subsystem sftp /usr/lib/openssh/sftp-server


# ETC