From 362206287265a8963abe9ee3f7fdec7f586502ac Mon Sep 17 00:00:00 2001
From: Jimmy Axenhus <github@axenhus.com>
Date: Sun, 28 Feb 2021 16:29:27 +0100
Subject: Initial commit

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+# qubes-vpn-exclude
+
+Hooks for [Qubes-vpn-support](https://github.com/tasket/Qubes-vpn-support) to
+exclude specific hosts from the VPN tunnel. Useful for when the VPN network
+won't forward requests to the public internet as this configuration allows
+AppVMs behind a VPN ProxyVM to directly connect to the internet instead of
+going through the VPN.
+
+Only requests over HTTP (port 80) and HTTPS (port 443) are excluded from the
+VPN.
+
+## Requirements
+
+ * Requires Qubes-vpn-support to be installed and working.
+ * dnsmasq must be installed in the ProxyVM (or template).
+ * ipset must be installed in the ProxyVM (or template).
+
+## Installation and configuration
+
+ 1. Enable qubes-vpn-handler in the ProxyVM by adding `vpn-exclude-domains` to
+    the services tab in Qube Manager.
+
+ 2. Copy the `qubes-vpn-exclude` folder to the ProxyVM.
+
+ 3. Execute `sudo bash ./install` in the `qubes-vpn-exclude` folder in the
+    ProxyVM.
+
+ 4. Edit `/rw/config/rc.local` and add a call to 
+    `/rw/config/qubes-vpn-exclude/rc.local-hook` right before
+    `# Start tunnel service`.
+
+ 5. Edit `/rw/config/qubes-vpn-ns` and add a call to 
+    `systemctl restart dnsmasq.service` right after 
+    `do_notify "LINK IS UP." "network-idle"`.
+
+ 6. Restart your ProxyVM.
+
+Now you should have a new file `/rw/config/qubes-vpn-exclude.list` in your
+ProxyVM. Edit it and add the domain names that you want to exclude. After that
+run `systemctl restart dnsmasq.service` for the changes to take effect (or 
+reboot your ProxyVM). Wildcards for all subdomains can be specified using the 
+syntax `.example.com`. Comments are supported using `#`.
+
+## Technical notes
+
+qubes-vpn-exclude is implemented using iptables, ipsets and dnsmasq.
+
+Upon startup of the ProxyVM iptable rules are added to exclude the ipsets
+`qubes-vpn-exclude-4` (for IPv4) and `qubes-vpn-exclude-6` (for IPv6) from the
+forced VPN tunnel. By default these ipsets are empty and therefore no domans
+are excluded from the VPN tunnel.
+
+When a DNS request is performed from an AppVM the ProxyVM will force redirect 
+them to the local DNS server provided by dnsmasq. If the domain matches the 
+list of excluded domains dnsmasq will use the local Qubes DNS server to resolve 
+them. The IPs for the domain will then be added to either the `qubes-vpn-exclude-4` or `qubes-vpn-exclude-6` ipsets.
+
+Any domain not matching the exclude list will be forwarded to the DNS in the 
+VPN.
+
+qubes-vpn-exclude has been tested on Fedora 30 but should work with any
+Linux-based ProxyVM supported by Qubes OS.
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