zyp001a / ssh_reverse_proxy Goto Github PK

For connection between machines without public ip address, but have access to internet.

A(no public ip address) -> B(public ip address) <- C(no public ip address)

A <---ssh reverse proxy---> C

clone this repo to A machine, and run

./ssh_nopasswd B_user@B_ip_address

to make sure two server can be connected without password

run

./ssh_open_remote_port B_user@B_ip_address

or

apt install autossh #or install autossh it by yourself
./ssh_open_remote_port_keep_alive B_user@B_ip_address

to add crontab line to keep the service open

B opens a new public ssh port, default 9999; for C, use this cmd to login A:

ssh -p 9999 A_user@B_ip_address

sshd service of A must be open at the default 22 port or you need change environment variable as follows:

LOCAL_PORT=22 REMOTE_PORT=9999 ./ssh_open_remote_port B_user@B_ip_address

• this script use -R and -N option of ssh binary, other ssh options are supported, for example:

./ssh_open_remote_port -p 123 B_user@B_ip_address

A ---LOCAL_PORT 22----> B <--ssh option(-p 123)----- C

A <------------REMOTE_PORT 9999(through B)-----------C

• https://www.howtoforge.com/reverse-ssh-tunneling
• https://superuser.com/questions/588591/how-to-make-ssh-tunnel-open-to-public