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I set up a Ubuntu server and connect it to my router. I assign a fixed internal IP to it and ssh within the local network is always fine.

However, even if I set port-forwarding to my server, there was no response. ssh user@externalIP did not work (no response). I suspect that it was my router which blocks it, so I set external port as 10 and internal port 22. ssh user@externalIP -p 10 has no response.

My router is a TP-Link C9 archer. The online support told me TP-Link now blocks ssh for my security. Is there any other way to work around?

Simon

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  • 1. use port in the range of >1024, e.g. port 9898. 2. open port 9898 in your router. 3. edit your question with the output of ssh -vvv user@externalIP -p 9898 – Yaron Dec 11 '17 at 14:34
  • I would rather use VPN – pLumo Dec 11 '17 at 14:46
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    Are you trying to connect using the external IP from within the LAN? if so the issue may be that your router does not support NAT loopback. – steeldriver Dec 11 '17 at 15:14
  • @steeldriver I am not connecting the external IP within the LAN. But ssh the internal IP works fine. – Simon Dec 12 '17 at 14:26
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Instead of forwarding ports, you might consider using VPN to connect to your Network.
(See TP-Link FAQ).

Once connected, you can connect with your internal IP:

ssh user@internalIP

As long as the router firmware is up to date and you choose a strong password, this is considerably safer. Attackers will attack the router instead of your computer.

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  • This is the best solution right now. Thanks RoVo. – Simon Dec 13 '17 at 4:44

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