Find All Open Ports (Listening Ports) on Ubuntu 18.04 | 16

Redirecting port 80, 443 on Ubuntu Server using iptables Redirecting port 80, 443 on Ubuntu Server using iptables View more Tutorials: Ubuntu Tutorials; 1- The Problem with Ubuntu 2- Configuring iptables. 1- The Problem with Ubuntu . When you log in the Linux OS (including Ubuntu) with a user that is not "root", you can not run applications with port < 1024. Accessing home services from anywhere, without port Port forwarding needs to be setup on your router so incoming connections are forwarded to the home server. However, you may not have full control over the router to setup these rules. Many routers will also take the default HTTP/HTTPS ports for their own services, leaving you with non-standard port numbers for everything else. How-To Guide – Internal Port Forwarding on Linux using the Oct 17, 2016

Jan 09, 2015

How To Configure Bind as a Caching or Forwarding DNS Jul 01, 2014 GUI on Ubuntu Server with X11 Forwarding

I'll assume a scenario where you want to access an internal server with an internal IP on port 80 through a server with an external IP on port 8080 using TCP. First we need to allow forwarding on the kernel level as this is usually disabled by default.

Set Up Port Forwarding Using Webmin or Terminal on Ubuntu