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# QubesOS Port Forwarding GSoC 2021
## Final Summary
The Qubes codebase is complex but well organized and written. Simple tasks, such as the basic port forwarding do require to edit and commit to multiple different components of the ecosystem. As a new entry, a lot has to be learned before being able to understand the whole picture and thus being able to plan new fetures and write useful code. Furthermore, setting up a testing environment has proven to be somewhat hard and testing is anyway is currently a manual process and is a bit time consuming.
In this page. The original goals of this GSOC had to be scaled down in impelementing simple and straightforward port forwarding of two types via CLI only.
This page also contains the notes i took during the planning and development process.
## Proposal text
### Introduction
Forwarding ports to Qubes VM is currently possible only though a multi step, error prone, manual process that also requires writing custom configuration in order to be persistent between reboots. Things as simple as starting a webserver or netcat for LAN file sharing canbe eventually a troublesome and time-wasting process[1][2]. Furthermore, applications thatrely on NAT traversal protocols such as those for audio and video communications do not workin direct P2P mode with STUN and always use TURN instead[3].
### Project Goals
Implement a GUI for automatic and persistent, eventually with a predefined timespan (ie: untilreboot), port forwarding. The idea is to split horizontally the "Firewall Rules" tab in the"Qubes Settings" window and add another area below it. It is aloready possible to forward TCP streams, however there is no GUI nor a clear dashboard and furthermore its versatility is limited. In addition, discuss and verify the possibility to implement a secure NAT traversal systemand GUI. A basic proposal could be a checkbox to enable NAT traversal requests. When thecheckbox is selected, the FirwallVM will redirect NAT traversal requests to a local pythondaemon or a dedicated VM that will negotiate the NAT traversal and configure the networkaccordingly. In this case, prompt the user in Dom0 about the NAT traversal request. Of coursethe qvm-* set of tools must e able to achieve the same tasks via CLI.
Implement a GUI for automatic and persistent, eventually with a predefined timespan (ie: untilreboot), port forwarding. The idea is to split horizontally the "Firewall Rules" tab in the"Qubes Settings" window and add another area below it. It is already possible to forward TCP streams, however there is no GUI nor a clear dashboard and furthermore its versatility is limited. In addition, discuss and verify the possibility to implement a secure NAT traversal systemand GUI. A basic proposal could be a checkbox to enable NAT traversal requests. When the checkbox is selected, the FirwallVM will redirect NAT traversal requests to a local pythondaemon or a dedicated VM that will negotiate the NAT traversal and configure the networkaccordingly. In this case, prompt the user in Dom0 about the NAT traversal request. Of coursethe qvm-* set of tools must e able to achieve the same tasks via CLI.
### Implementation
First develop and document the part related to manual port forwarding since it is both a more frequent use case and is less complicated. Depending on the problems encountered, evaluate the feasibility of secure NAT traversal.