I recently set up an Ubuntu Server at home, and the first thing I did was place the UFW firewall at full power. Bad move. I could not even "rlogin" to it.
I just disabled the firewall, and would like to set it up correctly.
These are the goals for this server:
- File server.
- Dynamic IP updating at openDNS.com (I have a couple of machines at home connected through a linksys router.)
- Web server.
What ports should I not block?