shell-things/etc/ssh/ssh_config

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# This works as a /etc/ssh/ssh_config or ~/.ssh/config like how I keep
# using it. Higher option takes priority (keep `Host *` bottom)
# User specific configs
Include ~/.ssh/config.d/*.conf
# Debian includes this
Include /etc/ssh/ssh_config.d/*.conf
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Host *
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# Path for the control socket.
ControlPath ~/.ssh/sockets/socket-%r@%h:%p
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# Multiple sessions over single connection
ControlMaster yes
# Keep connection open in the background even after connection has been
# closed.
ControlPersist yes
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ForwardAgent no
ForwardX11 no
# Debian sets this as yes, upstream no. TODO: What is it?
#GSSAPIAuthentication yes
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# Ensure KnownHosts are unreadable if leaked.
HashKnownHosts yes
LogLevel VERBOSE
Protocol 2
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# Always try public key authentication.
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PubkeyAuthentication yes
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# Send needed environment variables. I don't like setting wildcards
# and LC_ALL is disabled on purpouse.
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SendEnv EDITOR LANG LANGUAGE LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT LC_IDENTIFICATION TERM TZ
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# If the server doesn't reply in three "pings", connection is dead.
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# Defaults to 3 anyway, but I add it here for clearity and
# in case it decides to change in the future.
ServerAliveCountMax 3
# "ping" the server every minute.
ServerAliveInterval 60
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# OpenSSH 6.8+ - ask all host keys from servers.
# I trust the server admins and ways to identify the keys (DNSSEC,
# manual).
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UpdateHostKeys yes
# Workaround CVE-2016-0777 & CVE-0778 on OpenSSH < 7.1p2
UseRoaming no
# Verify SSHFP records. If this is yes, the question is skipped when
# DNSSEC is used, but apparently only "ask" and "no" write known_hosts
# However with "ask" you won't be told whether the zone is signed, so
# I consider "yes" to be the least evil.
VerifyHostKeyDNS yes