~/.ssh/config Example connecting via IPv6

config

Host my-server
  HostName 9x99:9x9:x99:x9x9::1   # placeholder, replace with your servers IPv6
  IdentityFile ~/.ssh/id_rsa
  IdentitiesOnly yes
  ForwardX11 yes
  Port 22                         # verify port with sudo ss -tnlp | grep ssh
  AddressFamily inet6
  User root                       # placeholder, use real user eg: ubuntu
  LogLevel DEBUG

gistfile1.txt

# same thing in your CLI (set interface eth0/eth1)
ssh -6 root@9x99:9x9:x99:x9x9::1%eth1 -p 22 -i ~/.ssh/id_rsa