Project

General

Profile

Actions
Copy link

Feature #9304

closed

DNS Rebind Protection should be configurable, defaults should be more sensible

Added by Andrew Bobulsky almost 6 years ago. Updated almost 3 years ago.

Status:
Resolved
Priority:
Very Low
Assignee:
-
Category:
DNS Resolver
Target version:
-
Start date:
02/03/2019
Due date:
% Done:

0%

Estimated time:
Plus Target Version:
Release Notes:

Description

Problem

The DNS rebind protection approach currently being used by pfSense is too heavy handed. It indiscriminately blocks all RFC1918 ranges regardless of whether or not the resolver/forwarder is reasonably expected to be protecting those networks from potential rebind attacks.

This is a problem for me because I use a VPN that does not map a private DNS server, and instead all private hosts behind the VPN have their FQDNs available in public DNS. With pfSense's unbound resolver operating normally, I can't look up any of the domains behind my VPN because I'm being "protected" from resolving IPs that aren't even on the LAN side of my pfSense box anyway.

Request

  • Instead of outright blocking all RFC1918 results, block only ranges that pfSense has a link or route to by default.
  • Provide an option to disable the stock rebind protection altogether, which will then allow users to configure granular rebind protections directly in the unbound Custom options.
Actions
Copy link

Also available in: Atom PDF