ubuntu server pptp vpn server (pptpd or poptop) installation

install pptpd:
	sudo apt-get install pptpd

edit /etc/pptpd.conf file:
	sudo nano /etc/pptpd.conf

put the following entry below. localip is the ip address of the server & remoteip is the range of ip address you want the remote pc to have when connecting:
	localip 192.168.1.250
	remoteip 192.168.1.160-200,192.168.1.199

edit /etc/ppp/pptpd.options:
	sudo nano /etc/ppp/pptpd-options

make sure to put the value below and must be uncommented:
	require-mschap-v2
	ms-dns 8.8.8.8
	nobsdcomp
	noipx
	mtu 1444
	mru 1444


edit /etc/ppp/chap-secrets:
	sudo nano /etc/ppp/chap-secrets

put the username and passwords of the remote users that will connect. make sure that the users have a user account on the server.
	# Secrets for authentication using CHAP
	# client        server  secret                  IP addresses
	YOUR_USERNAME_HERE      pptpd   YOUR_PASSWORD_HERE       *

to enable remote users to access other computers on the network or be able to surf the internet through the vpn tunnel then edit /etc/sysctl.conf:
	sudo nano /etc/sysctl.conf

set the value below:
	net.ipv4.ip_forward=1

restart the server:
	sudo reboot

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if the remote client still have problem connecting to internet, then set up ip-masquerading in /etc/rc.local:
	sudo nano /etc/rc.local

	Add the following lines above the line that says ‘exit 0‘
		iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE