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
