Nice guide

1. Install dependencies

$ sudo apt-get install openvpn git dhcpcd5 tar wget grep iptables-persistent dnsutils expect whiptai

2. Install PiVPN

$ curl -L https://install.pivpn.io | bash

Use your router IP as DNS and use custom DNS.

3. Adding Users

$ pivpn add

All commands should be run with sudo!! Guide to extend validity of CRL days, The guide to update CRL is based on: Guide

Check Logs in /var/log/openvpnas.log.

To backup crl.pem file, run the following command

mv crl.pem crl.pem.back

I have used EasyRSA to generate CRL in the past, so I was able to fix it by using the following commands. Change working directory to easy-rsa

cd easy-rsa

then run

./easyrsa gen-crl

Now you will see the location of the newly created crl file. we are going to copy this file to /etc/openvpn (Make sure you use the exact file location to copy from)

cd ..
cp -pr /etc/openvpn/easy-rsa/pki/crl.pem .

Finally restart openvpn service

service openvpn restart