PPTP Installation

  1. (Optional) Scrap off all the junk you won't need if it is a new box:
    wget -O master.tar.gz http://github.com/maxexcloo/Minimal/tarball/master; tar zxvf *.gz; cd *Minimal*; sh minimal.sh ssh
    						

    If you are still using only root (have its benefits when you are just setting up your server), you will probably need to re-enable root login. Edit /etc/ssh/sshd_config and find:
    PermitRootLogin no
    						
    Replace it with:
    PermitRootLogin yes
    						
    Save the file, exit the editor, and restart your SSHd server:
    /etc/init.d/ssh restart
    						
  2. Install PPTPD:
    apt-get install pptpd
    						
  3. Enable forwarding by editing /etc/sysctl.conf find:
    #net.ipv4.ip_forward=1
    						
    Replace it with:
    net.ipv4.ip_forward=1
    						
    Save the file, exit the editor, and apply the changes:
    sysctl -p
    						
  4. Towards the end of /etc/pptpd.conf, add, or uncomment these lines:
    localip 10.84.1.1
    remoteip 10.84.1.101-200
    					
  5. Create your users by editing your /etc/ppp/chap-secrets file by adding it in the following format:
    # Secrets for authentication using CHAP
    # client		server	secret			IP addresses
    andy			pptpd	1234			*
    john			pptpd	abcd			*
    						
  6. Create a new file which will manage the routing with iptables firewall by creating /etc/init.d/vpnforward :
    #! /bin/sh
    
    case "$1" in
    	start)
    		iptables -A INPUT -p tcp --dport 1723 -j ACCEPT
    		iptables -A INPUT -p 47 -j ACCEPT
    		iptables -A FORWARD -i ppp+ -o vent0 -j ACCEPT
    		iptables -t nat -A POSTROUTING -s 10.84.1.0/24 -j SNAT --to-source 185.45.192.1
    		echo "iptables entries for VPN forwarding added"
    		;;
    	stop)
    		echo "nothing to unload"
    		;;
    	*)
    		echo "Usage: /etc/init.d/vpnforward {start|stop}"
    		exit 1
    esac
    
    exit 0
    						
    Make it executable:
    chmod a+x /etc/init.d/vpnforward
    						
    Add it to your boot sequence so you don't need to make the changes each time your VPS reboot:
    update-rc.d vpnforward defaults
    						
    *note: use this command if you want to remove it from auto-run at boot:
    update-rc.d -f vpnforward remove
    						
  7. Edit /etc/ppp/pptpd-options with the following options:
    name pptpd
    refuse-pap
    refuse-chap
    refuse-mschap
    require-mschap-v2
    require-mppe-128
    proxyarp
    lock
    nobsdcomp
    novj
    novjccomp
    nologfd
    ms-dns 8.8.8.8
    ms-dns 8.8.4.4
    						
  8. Everything should be set and good to go now, give it a try!
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