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I've got a working domain for my Raspberry Pi to which I can ping to. I forwarded the port for SSH (Port 22) on my router as well, but I still cannot connect from outside to my Raspberry.

Connecting to it via the local IP address in the local net works perfectly fine. However, ssh [username]@[domain] is not working. Connection refused to port 22. I'm using Ubuntu. Have you got any ideas?

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Have we got any ideas? Probably.

  • Try opening up your firewall using iptables -A INPUT -p tcp --dport 22 -j ACCEPT
  • Maybe your router (or Pi) uses DHCP and your port forward isn't valid anymore. Try running ifconfig -a and check the IP of your network interface (probably eth0).
    • Check if inet addr still matches the one on your port forward.
  • Double-check your domain's A record. Some ISPs assign IP addresses using an address pool and DHCP. Maybe your domain's A record isn't your IP address anymore.
    • You can just ping the domain the run curl icanhazip.com on your Pi and check if the IP addresses match.
  • Maybe your ISP is a butt and placed you behind a transparent proxy (since maybe they have a limited IP pool). This is actually the primary reason I switched ISP. Check using http://www.lagado.com/proxy-test
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  • it doesnt work. with the "nmap" i found out that the port 22 is "closed". thats why i changed the port to be listened from 22 to 7. Surely i portforwarded port 7 as well. i'm still not able to connect to my raspberry pi. ssh [name]@[domain.com] -p 7 does not work. im out of ideas. – Vinhi Apr 25 '16 at 21:18
  • @Vinhi Check the last bullet. – PNDA Apr 26 '16 at 11:28

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