ssh2telnet

A container image which runs an SSH server and proxies connections to a telnet server.

Telnet related environment variables

• HOST address of telnet host
• USERNAME used in telnet.sh expect login script
• PASSWORD used in telnet.sh expect login script

SSH related environment variables

• PASSWORD password set for user account
• KEY string of public key to connect to ssh

Building

Run the following to build::

buildah bud -t --build-arg user=switch ssh2telnet:latest .

Running

Create an environment file env.bash::

USERNAME=manager
PASSWORD=<password>
HOST=telnet.example.com
KEY=<public key contents>

Run the container::

podman run -p 2222:2222 --env-file ./env.bash --rm ssh2telnet:latest

Connect to the container::

ssh switch@localhost -p 2222

telnet.sh

This is an expect script specific to a telnet connection that requires a login. It can be customised by replacing in the image or bind mounting an alternative.