IP Networking

The router passes off to an ethernet switch and then to my computer. This may be the problem, but I had thought the switch's only functionality was to split the internet connection, not to perform firewall functionality like a router.

I found a setting called Demilitarized Zone on my router (D-Link DI-604). It is supposed to allow unrestricted internet access to the specified IP. Maybe this will help, I will check in the morning when I get into work.

Update: Port forwarding is definitely working. ssh to the external IP from inside my home network redirects back to the ubuntu machine. Hopefully this means it is working now... I suppose I will find out

Awesome, I have it working. Thank you to everybody for your help. I had missed a firewall exemption in my router settings.

@bluejayek

Glad you've solved your problem. I think most of the time users should peform these steps. It won't apply to you anymore but could help others who has the same problem

I think these are the steps you should take

1) Open the port 22 in your router. I assume you are behind th NAT. So on your router you must have some option to do NAT-ting. So put port 22 to liste to the IP address that has been assigned to your Ubuntu machine.

2) Make sure sshd is running on Ubuntu.
3) Flush iptables this way

Code:

/sbin/iptables -F
/sbin/iptables -X

4) Try to connect

If this all does not work try to disable selinux this way:

vi /etc/selinux/config and make sure it looks like

Code:

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#	enforcing - SELinux security policy is enforced.
#	permissive - SELinux prints warnings instead of enforcing.
#	disabled - SELinux is fully disabled.
SELINUX=disabled
# SELINUXTYPE= type of policy in use. Possible values are:
#	targeted - Only targeted network daemons are protected.
#	strict - Full SELinux protection.
SELINUXTYPE=targeted

Regards,

_val_

what about VNC ? i don´t really know if it works for ubuntu or mac but you can probe that.