[FS#640] Undocumented / unnamed firewall rules installed by default

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Michael Jones (jonesmz) 

Attached to Project - LEDE Project
Summary - Undocumented / unnamed firewall rules installed by default
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - lede-17.01
Due in Version - Undecided
Due Date - Undecided
Details - Supply the following if possible:
 - Device problem occurs on
 - Software versions of LEDE release, packages, etc.
 - Steps to reproduce
   

 Please see this forum post: https://forum.lede-project.org/t/where-does-the-udp-port-500-firewall-rule-come-from/2220/7

There are firewall rules installed by default for UDP port 500, and protocol ESP that have no documentation.

Personally, I would prefer to see these rules removed, as they are unneeded unless using IPSec, but I would alternatively be happy to see them be given names by default.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=640