To expand on what’s been suggested, let’s step back and make sure the basic network connectivity is working. Start by checking if your Windows XP machine can even reach the Linux server:
- Ping the Linux machine from Windows XP:
ping <linux-machine-ip>
If the ping fails, that points to a basic network issue, not just the debugging connection. 2. Check for any NAT or VPN issues: If your Windows XP machine is behind a corporate VPN, it may be blocking external connections to port 4000. In such cases, check if your Linux machine and Windows XP machine are on the same subnet. If they’re not, you can check the routing table on Linux:
ip route show
If necessary, add a route for the Windows XP subnet:
sudo route add -net <win-xp-subnet> gw <gateway-ip>
- Try SSH port forwarding as a workaround: If none of the previous steps work, an effective method is to use SSH to forward the debug port. Run this command on your Windows XP machine:
ssh -L 4000:localhost:4000 user@linux-machine
This way, your local machine will tunnel the connection through SSH, allowing you to connect Eclipse to localhost:4000 on your Windows XP machine.
By going through these steps, you’ll bypass some of the network restrictions and should be able to establish the Java remote debug connection.