From 922aa06f9f55e9aead4fc211d12c7d87217740d3 Mon Sep 17 00:00:00 2001
From: Paul M <paul@penguinpost.net>
Date: Sun, 1 Nov 2020 21:18:15 -0600
Subject: [PATCH] Add files via upload

Added copy of working script
---
 vpnwatch | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 vpnwatch

diff --git a/vpnwatch b/vpnwatch
new file mode 100644
index 0000000..50c635a
--- /dev/null
+++ b/vpnwatch
@@ -0,0 +1,55 @@
+#!/bin/bash
+
+# Standard bash script, requires bash install on OpenWrt
+# and monit to be installed and configured
+
+# We assume a few things when this is called, first
+# that the VPN DNS (Expressvpn) is failing second
+# that a restart of openvpn will fix it
+
+# Note the location of OpenVPN startup script assuming
+# its already setup and there
+
+# Note location of startup script is /etc/init.d/openvpn
+# We assume the OpenVPN file used to configure this connection
+# also has script security set to 2 so we can use the up 
+# and down scripts to force the DNS to swap. 
+
+# Make sure your wan port isn't setup for DHCP as some DHCP
+# setups can cause the DNS to reset from time to time 
+# Your ISP's DHCP may not be a problem though as I only
+# encountered this when I had another router upstream
+
+# Step one we reset OpenVPN
+# /etc/init.d/openvpn restart
+
+# step two we ping a site and see if it resolves
+
+# begin hackery
+
+# Note: The line below does two things first tries to ping
+# a domain. Second, causes grep to exit with status code
+# 0 if the word "bad" is present otherwise exit 1
+
+ping -c 4 expressvpn.com |& grep -q bad
+
+# note bash supports |& for piping stderr as to where
+# the default shell doesn't
+
+result=${PIPESTATUS[1]}
+# echo "result $result"
+
+# ${PIPESTATUS[1]} reffers to the exit code of one of the
+# piped commands in this case the grep
+
+if [ $result -eq 1 ]; then
+# If it is ok log it and move on
+logger VPN DNS OK `date`
+fi
+
+if [ $result -eq 0 ]; then 
+# If we have issue kick a message to syslog and restart
+# Ends up in root.log for remote syslog server
+logger Restarting OpenVPN `date`
+/etc/init.d/openvpn restart # best option to let openvpn handle it
+fi