PPTP Server
===========

google:
ubuntu help pptp server

https://help.ubuntu.com/community/PPTPServer


pptpd
-----

sudo apt install pptpd

sudo nano /etc/pptpd.conf
    localip 192.168.30.1
    remoteip 192.168.30.220-230

sudo nano /etc/ppp/pptpd-options
    ms-dns 8.8.8.8
    ms-dns 8.8.4.4

sudo nano /etc/ppp/chap-secrets
    user1   *   user1-password  *
    user2   *   user2-password  *


sudo systemctl enable pptpd
sudo systemctl restart pptpd


sysctl
------

sudo nano /etc/sysctl.conf
    net.ipv4.ip_forward=1

sudo sysctl -p


iptables
--------

sudo apt install iptables-persistent

sudo iptables -t nat -A POSTROUTING -s 192.168.30.0/24 -o enp0s31f6 -j MASQUERADE
sudo iptables -A FORWARD -p tcp --syn -s 192.168.30.0/24 -j TCPMSS --set-mss 1356

sudo iptables -A PREROUTING -t nat -i enp0s31f6 -p tcp --dport 80 -j DNAT --to 192.168.30.210:8000
sudo iptables -A FORWARD -p tcp -d 192.168.30.210 --dport 8000 -j ACCEPT

sudo iptables-save > iptables-save.txt
sudo cp iptables-save.txt /etc/iptables/rules.v4