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I have the no-ip service running on my raspberry pi, it updates the DNS (no-ip) whenever there is a change to it's IP address. I have enabled port forwarding on my router (Asus rt-n66u) ports 22 & 80, pointing to the intranet IP of the pi. I have not adjusted any firewall settings, everything about the router is 'out of the box' including firmware.

When I ping the domain name, I get 0 packet loss.

When I try to connect via ssh:

OpenSSH_6.9p1, LibreSSL 2.1.7
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 20: Applying options for *
debug1: /etc/ssh/ssh_config line 102: Applying options for *
debug1: Connecting to [DOMAIN_NAME] [MY_GlOBAL_IP] port 22.
debug1: connect to address [MY_GlOBAL_IP] port 22: Operation timed out
ssh: connect to host [DOMAIN_NAME] port 22: Operation timed out

Is there something that I need to check with my router configuration and network setup perhaps?

Also note, I am able to connect via the local IP address of the intranet, i.e. 192.168.1.231 ssh just fine.

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    Unless your pi is missing a default route or something like that, this sounds like a question about your router's NAT and firewall, not about the pi. On topic if that router/firewall is Unix-based (but then you need details on its configuration), off topic if not. – Celada Feb 20 '16 at 22:12
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    Where are you connecting from? Is the Pi running any firewall (iptables -L?) As well as enabling port forwarding on your router, have you change the router to allow incoming ssh traffic (it's usually a two step process). You may be better served asking this over at SuperUser, but it does depend on where the problem lies. – EightBitTony Feb 20 '16 at 22:19
  • I am connecting from my LAN the same one the Pi is on. I upgrades the firmware to Asuswrt-Merlin and enabled ssh on port 22 in the admin settings. – Andy Coles Feb 20 '16 at 23:40
  • arget prot opt source destination fail2ban-ssh tcp -- anywhere anywhere multiport dports ssh – Andy Coles Feb 20 '16 at 23:43
  • install tcpdump on pi and run this: tcpdump -nni any tcp port 22 as root and try connecting. If there are no new lines showing attempts, then problem is in your router setup. – user140866 Feb 22 '16 at 4:18

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