⚠️ Prerequisites:

SoftEther VPN Client (Linux; choose architecture accordingly)

https://www.softether-download.com/en.aspx?product=softether

Original author of the scripts is https://github.com/mfaizanse

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Make sure that IP forwarding is enabled:

cat /proc/sys/net/ipv4/ip_forward

If it returns 1, we are good to go. If it is 0, you need to edit /etc/sysctl.conf file. You can do this in vi or gedit or whatever you like:

#If you need to edit the sysctl.conf file
sudo vi /etc/sysctl.conf

Then uncomment the net.ipv4.ip_forward=1 line, then save and close the file.

Next run the following command to apply the changes:

sudo sysctl -p

Now run the following command again, and check that 1 is returned (IP forwarding enabled).

cat /proc/sys/net/ipv4/ip_forward

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Run the following command to find the local gateway of the system:

sudo netstat -rn
#the local gateway is the one where the Destination IP is 0.0.0.0
#it will probably be 192.168.0.1

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Extract the SoftEther VPN Client tar.gz file into a location such as ~/softether

mkdir ~/softether
tar -xf softether-vpnclient-blahblah.tar.gz -C ~/softether

Save the scripts in this repo to ~/softether

Open the vpn_config file, edit and save the following:

#where the extracted SoftEther VPN Client is
CLIENT_DIR=”/home/khadas/softether/vpnclient

#name for the virtual network interface
#after creating, it will be shown as vpn_nic1 if you run the ifconfig command
#you can set this as whatever you want, but need to remember it for future steps
NIC_NAME="nic1"

#name for the VPN. Do not confuse with username
ACCOUNT_NAME="yonseidronevpn"

#VPN Server Public IP Address
VPN_HOST_IPv4="165.132.XX.XX"

#The local gateway you found above
LOCAL_GATEWAY="192.168.0.1"

Open the vpn-connect.sh file, edit and save the following:

...
#Set IP routes for VPN
sudo ip route add $VPN_HOST_IPv4/24 via $LOCAL_GATEWAY
sudo ip route del default via $LOCAL_GATEWAY
sudo netstat -rn
...
#Refresh IP address info from VPN server
#sudo dhclient vpn_$NIC_NAME

We changed the subnet mask to /24 and disabled (commented) the dhclient command since we will be setting a static IP for this device.

📢 Ask the VPN server admin for your IP Address in line 37 of vpn-connect.sh file.

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Check that the .sh files haven't been tampered with by a malicious third-party, then make them into executables with the chmod command:

chmod +x ./setup-client.sh
chmod +x ./remove-client.sh
chmod +x ./vpn-connect.sh
chmod +x ./vpn-disconnect.sh

Then run setup-client.sh:

#To run, run the following command
./setup-client.sh

Follow the steps shown on the terminal window.

For Destination VPN Server Host Name and Port Number, type the server IP address and port that the server is listening on:

165.132.XX.XX:AAAA
Where AAAA is the port number

For Connecting User Name, type macbook or whatever username you configured when you configured the VPN server.

📢 Ask the VPN server admin for your username

For Used Virtual Network Adapter Name, type nic1 or whatever name you set above.

For Password type the password for the user you created (passwd in our example)

📢 Ask the VPN server admin for your password

For Specify standard or radius, type standard, as we used the standard authentication method.

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When all steps are done, check that there were no errors and run the following command:

./vpn-connect.sh

To disconnect from the VPN, run the following command:

./vpn-disconnect.sh

To permanently sign out, first disconnect from the VPN and run the following command:

./remove-client.sh

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For more fine tuned control, first set up the VPN client using the setup-client.sh script, then navigate to ~/softether/vpnclient

Then start the vpn client by running the following command:

sudo ./vpnclient start

Then run the vpn configuration software:

./vpncmd

Type 2 to configure the VPN client, then type HELP to see available commands.