Ubuntu: How to setup pptp vpn server

# warning: this is not script, it's a set of instructions. #these steps create pptp vpn server so all clients can reach all others clients. sudo apt-get install pptpd sudo update-rc.d pptpd defaults #edit file "/etc/pptpd.conf": example using nano: $> sudo nano /etc/pptpd.conf #add the following lines: localip remoteip: #100 clients #save it #edit file "/etc/ppp/chap-secrets": example using nano: $> sudo nano /etc/ppp/chap-secrets #add all clients with fixed ip addresses (change user1, user2... and password1, password2,.. according to your preference): user1 pptpd password1 user2 pptpd password2 user3 pptpd password3 : #save it #Configure iptables for forwarding (let clients see all each other): iptables --table nat --append POSTROUTING --out-interface ppp0 -j MASQUERADE iptables -I INPUT -s -i ppp0 -j ACCEPT iptables --append FORWARD --in-interface enp0s8 -j ACCEPT iptables-save #restart your service: sudo service pptpd restart
This VPN server configuration is useful to create a private network where all clients see each other. For ubuntu clients it is necessary to configure vpn settings:
-> VPN -> Advanced -> check all MSCHAP

Here gateway is not specified because I don't use vpn to navigate to internet.

If you don't want to use vpn internet (just like me) then you must specify in properties of connection on each client use this vpn only for local (vpn) resources: (after creating connection):

Ubuntu desktop (Network Manager):

* VPN Network settings -> IPv4 settings -> Routes
1) Add address:, subnet mask:, gateway:, Metrics:0
2) check only “Use this connection only for resources on its network”

Windows (depending on version):

* Double-click My Computer, and then click the Network and Dial-up Connections link.
* Right-click the VPN connection that you want to change, and then click Properties.
* Click the Networking tab, click Internet Protocol (TCP/IP) in the Components checked are used by this connection list, and then click Properties.
* Click Advanced, and then click to clear the Use default gateway on remote network check box.
* Click OK, click OK, and then click OK.

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