Jump Server

Connect to servers behind firewalls or in private networks by routing through an intermediate jump server.

What is Jump Server?

A jump server acts as a gateway to access other servers that:

• Are behind firewalls
• Don’t have direct SSH access
• Are in private networks
• Require multi-hop connections

Setup

Step 1: Configure Jump Server

Add the jump server as a normal server first:

1. Add server with SSH credentials
2. Test connection to ensure it works
3. This server will be your jump host

Step 2: Configure Target Servers

For each server you want to access via jump:

1. Add target server (credentials for target, not jump)
2. Server settings → Jump Server
3. Select your jump server from list
4. Save

Step 3: Connect

Connect to target server normally. The app automatically:

1. Connects to jump server
2. Tunnels through to target server
3. Maintains connection

Use Cases

Private Network Access

Your Device → Jump Server (public IP) → Private Server (10.0.0.x)

Behind Firewall

Your Device → Bastion Host → Internal Server

Multi-Hop

You can chain multiple jump servers for complex networks.

Requirements

• Jump server must be accessible from your device
• Jump server must be able to reach target servers
• SSH keys recommended for jump server (faster authentication)

Tips

• Use SSH keys on jump server for faster connections
• Test direct access to jump server first
• Check firewall rules on both ends
• Monitor connection - issues could be on jump or target

Troubleshooting

Connection Times Out

• Verify jump server is accessible
• Check jump server can reach target
• Test manually: ssh -J jump@jump-server user@target-server

Authentication Fails

• Verify credentials for target server (not jump)
• Check SSH keys if using key authentication

Slow Connection

• Normal for jump connections (extra hop)
• Consider using SSH keys for faster auth
• Check network latency to jump server