IOFlood VPN Ubuntu 20.04 & Debian 9 Server Auto Connect/ReConnect Setup

In order to connect to IOFloods VPN from Ubuntu 20.04 or Debian 9 server or similar linux systems, you will need to do the following as root or sudo user.
Key *:
USERNAME: Use the Username assigned to your VPN Access
PASSWORD: Use the Password assigned to your VPN Access

1. Install required packages
apt install pptp-linux network-manager-pptp -y

2. Create credential file for VPN Access *
echo "USERNAME PPTP PASSWORD 107.167.83.4" >> /etc/ppp/chap-secrets

3. Setup VPN Route config
cat > /etc/ppp/ip-up.d/route-traffic <<EOF
#!/bin/bash
NET1="10.10.0.0/16"
IFACE="ppp0"
route add -net \${NET1} dev \${IFACE}
EOF

4. Make VPN Route config executable
chmod +x /etc/ppp/ip-up.d/route-traffic

5. Create VPN PPP connection config *
cat > /etc/ppp/peers/ioflood <<EOF
pty "pptp 107.167.83.4 --nolaunchpppd"
name USERNAME
remotename PPTP
require-mppe-128
file /etc/ppp/options.pptp
ipparam ioflood
EOF

6. Allow PPTP through firewall UFW or IPTABLES
UFW:
ufw allow 1723
ufw disable
ufw enable
IPTABLES:
iptables -A INPUT -i pptp -j ACCEPT
iptables -A OUTPUT -o pptp -j ACCEPT
iptables-save > /etc/iptables/rules.v4

Once completed you should be able to start and connect to the VPN by running the first command below.
Starting VPN:

pon ioflood
Stopping VPN:
poff ioflood

**** Optional Auto ReConnect cron script ****
This script will ping one of your IPMIs and if no response restart the VPN connection.

Key *:
IPMIip: Use IP address of IPMI you want to monitor for valid connection EX: 10.10.70.11

1. Make Directory to store script
mkdir /opt/ioflood

2. Create script (Change IPMIip to an IPMI IP you want to monitor) *
cat > /opt/ioflood/iofloodvpnchk.sh <<'EOF'
#!/bin/bash
HOST=IPMIip

DATE=`date`
PINGRES=`ping -c 2 $HOST`
PLOSS=`echo $PINGRES : | grep -oP '\d+(?=% packet loss)'`
echo "$DATE : Loss Result : $PLOSS"

if [ "100" -eq "$PLOSS" ];
then
echo "$DATE : Starting : IOFlood VPN"
pon ioflood
echo "$DATE : Now running : IOFlood VPN"
else
echo "$DATE : Already running : IOFlood VPN"
fi
EOF

3. Make script executable
chmod +x /opt/ioflood/iofloodvpnchk.sh

4. Add the cron to run the script
crontab -e

Now add this to the cron and save
SHELL=/bin/bash
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
*/1 * * * * /opt/ioflood/iofloodvpnchk.sh >> /tmp/iofloodvpn.log 2>&1

Once you have setup the cron you can test it by stopping the VPN waiting 1 minute and checking if the connection was restored.
Stopping VPN
poff ioflood

Checking for VPN connection, Look for ppp0 section
ip a

Response to look for
4: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1396 qdisc pfifo_fast state UNKNOWN group default qlen 3
link/ppp
inet 10.111.5.100 peer 10.167.4.1/32 scope global ppp0
valid_lft forever preferred_lft forever

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