,help-ssh

#!/usr/bin/env bash
print-header 'SSH'
print-url https://grahamhelton.com/blog/ssh-cheatsheet/

echo
cat <<-EOF
ssh -t <host> top
scp -F ~/.ssh/config ...

# Local Port Forwarding (-L)
# Binds local port 1337 to remote server port 80
ssh -N -f -L 1337:127.0.0.1:80 root@internal-web.int
  -N:                    No commands
  -f:                    Open SSH in the background
  -L:                    Tells SSH to forward a local port
  1337:127.0.0.1:80:     Bind local port 1337 to the remote port of 80
  root@internal-web.int: Login to the remote server as the root

# Remote Port Forwarding (-R)
# Opposite of local port forwarding
# Binds remote port 3000 to the local port 80
ssh -N -f -R 3000:127.0.0.1:80 root@vuln-server.int.

# Jumphosts (-J)
# Jump chain: campfire.int -> vuln-server.int -> internal-web.int -> dns.int.
ssh -J root@vuln-server.int,root@internal-web.int root@dns.int
  -J: Each jump is separated by a comma
EOF