RSSH

Reverse SSH gateway. SSH into any host in a private network by installing an agent that will maintain a reverse SSH session on a public server.

Quickstart

0. Start the RSSH API & Gatekeeper

git clone https://github.com/Xide/rssh.git
cd rssh
docker-compose up --build

1. Register your subdomain

go build

# baguette.localhost is the default specified in `.rssh.yml`
# It will register 127.0.0.1:22 by default. If
# you wish to expose another host, you can use
# the `--host` and `--port` arguments
./rssh agent register -d subdomain.baguette.localhost

>> 2019-02-10T03:39:43+01:00 INF Register new endpoint Host=127.0.0.1 Port=22 domain=subdomain.baguette.localhost
>> 2019-02-10T03:39:43+01:00 INF Persisted credentials to disk. domain=subdomain.baguette.localhost

./rssh agent ls

>> |-----------------------------------------------------------------------------|
>> | Domain                               | UID                                  |
>> |-----------------------------------------------------------------------------|
>> | subdomain.baguette.localhost         | a6ea341f-9b6d-413f-82be-da0ba214c831 |
>> |-----------------------------------------------------------------------------|

# Start to expose all the registered domains so far

./rssh agent

>> 2019-02-10T03:48:11+01:00 INF Starting RSSH agent. root-dir=/home/billy/.rssh
2019-02-10T03:48:11+01:00 INF Finished hosts import. hosts_count=1
>> 2019-02-10T03:48:11+01:00 INF Established forwarding. domain=subdomain.baguette.localhost host=127.0.0.1 port=22

2. Connect through RSSH

cat >> ~/.ssh/config << EOF
Host *.baguette.localhost
    ProxyCommand ssh -p 2223 127.0.0.1 %h

EOF

ssh subdomain.baguette.localhost

3. Cleanup

# Remove subdomain identity from agent known hosts
./rssh agent rm subdomain.baguette.localhost

>> 2019-02-11T15:56:31+01:00 INF Identity removed

# Two down to force volumes deletion
docker-compose down; docker-compose down;

Configuration

See .rssh.yml

Environment variables

You can use override any default and configuration sourced variable with the environment. All environment variables are prefixed with RSSH_, and their name is constructed by taking the capitalized dot separated path of your variable in .rssh.yml. (e.g: gatekeeper.ssh_port_range => RSSH_GATEKEEPER_SSH_PORT_RANGE)

TODO

Agent:

• Reconnect on hangup
• Runtime config synchronization
• Proper resources garbage collection
• New commands :
  • list identities
  • remove identities
• daemon

Gatekeeper:

• HostsKey file

API:

• HTTPS

Global:

• More logging
• Proper README
• Guides
• CI/CD
• Multiple API's / Gatekeepers
• Agent multi OS compatibility
• bash / zsh completions
• Etcd authentication