reverse ssh, ssh forwarding

ssh-reverse-ssh.sh

# reverse ssh tunneling
# simple way
# ref from : https://www.howtoforge.com/reverse-ssh-tunneling
#
# env-summary
#   target : 192.168.5.10 (internal ip in firewall)
#   ssh-gateway : 100.100.100.10 (static ip in public access)
# 
# step 1) login to ssh-gateway from target(target is your final destination)
ssh -R 19999:localhost:22   mulder@100.100.100.10
# okay... established connection and keep connection, don't logout
#   
# step 2) you can login to ssh-gateway from anyware (keep connection step1)
#
ssh mulder@100.100.100.10
#
# step 3) go to target host (to internal host) from gateway-host
ssh -p 19999 localhost
#