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# Connectivity
Port 22
AddressFamily any
ListenAddress 0.0.0.0
ListenAddress ::

# Fluff
PrintMotd yes

# SFTP
Subsystem sftp ${sftp}

# Authentication
AuthorizedKeysFile /etc/ssh/authorized_keys .ssh/authorized_keys
ChallengeResponseAuthentication no
PasswordAuthentication no
PermitRootLogin no
PubkeyAuthentication no

# Security
Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr
HostKeyAlgorithms ssh-ed25519
KexAlgorithms curve25519-sha256,curve25519-sha256@libssh.org
MACs hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,umac-128-etm@openssh.com

# Allow tyil
Match User tyil
    PubkeyAuthentication yes

# Allow public key authentication over VPN
Match Address 10.57.0.0/16
    PubkeyAuthentication yes
    PermitRootLogin prohibit-password