SSH Key Info

config

# All subsequent files, prefixed config.d_ should be in the config.d/ directory, so config.d_aws becomes config.d/aws
Include config.d/*

config.d_aws

# Note this assumes you're working with the "YOUR-REGION" (should be something like us-east-1)
# Also assumes you have the aws CLI installed.
host i-* mi-*
    ProxyCommand sh -c "aws ssm --region YOUR-REGION start-session --target %h --document-name AWS-StartSSHSession --parameters 'portNumber=%p'"

config.d_github

Host github.com gist.github.com gitlab.com
        User git

config.d_legacy_appliances

# Only for use with really legacy gear which MUST LIVE inside your management network!
# Thanks to Stuart (https://yetiops.net/) for these lines of config.
Host *.switch.management.lan
        KexAlgorithms +diffie-hellman-group1-sha1
        Ciphers +aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc
        # DSA auth *might* be required. If so, generate a DSA key with
        # ssh-keygen -t id_dsa
        # and use this setting... But if not, comment it out and use RSA or ED25519!
        IdentityFile ~/.ssh/id_dsa

config.d_my-server

# Note that you can have lots of different aliases for the same server in here,
# perhaps if you have a VPS with several DNS names on you might want to put them all in here.
# You can also put wildcards in here :)
Host server.example.com *.server.example.com my_server server
        Hostname server.example.com
        Port 12345
        User someuser

config.d_port-forwarding-and-proxying

# This provides a direct forward to your internal proxy, from it's port 8080 to your local port 18080
# It also allows you to use a SOCKS proxy, using localhost:1080
Host SomeProxy
    Hostname gateway.example.org
    User someuser
    Port 12345
    LocalForward 18080 proxy.example.lan:8080
    DynamicForward 1080

config.d_some-system

Host mail.system.example.org web.system.example.org dns.system.example.org
        Port 12345

Host *.system.example.org
        User someuser
        IdentityFile ~/.ssh/id_ed25519.system.example.org

config.d_via-jumphost

Host JumpHost
    Hostname jumphost.mycorp.example.net
    User someuser

Host *.mycorp.example.net
    ProxyJump JumpHost
    User someuser
    

config.d_wildcard

# Note that this turns off security on some key things, but if you're connecting to lots of cloud machines, it's useful!
Host *
        StrictHostKeyChecking no
        UserKnownHostsFile /dev/null