# NETWORKS:
# DMZ: 23.214.219.128/25
# Internal: 192.168.10.0/24
# 
# MACHINES:
# DNS2: 192.137.16.75
# EDEN 193.138.212.1
dns2="192.137.16.75"
eden="193.138.212.1"

# ==============================
# Router 1
# INTERFACES:
# - Internet: 87.248.214.97
# - DMZ: 23.214.219.254
# - Internal: 192.168.10.254
# ==============================

# ==============================
# DMZ /25
# IP:
# - dns : 23.214.219.129
# - dns2 : 23.214.219.130
# - smtp : 23.214.219.131
# - www : 23.214.219.132
# - vpn-gw: 23.214.219.133
# ==============================

# ==============================
# Internal
# IP:
# ftp: 192.168.10.1
# datastore : 192.168.10.2
# DHCP Client : 192.168.10.3-5
# ==============================

sudo ifconfig enp0s8 23.214.219.254 netmask 255.255.255.128
sudo ifconfig enp0s9 192.168.10.254 netmask 255.255.255.0
sudo ifconfig enp0s3 87.248.214.97 netmask 255.255.255.0


sudo iptables -F
sudo iptables -t nat -F
sudo iptables -t mangle -F
sudo sysctl -w net.ipv4.ip_forward=1
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT ACCEPT
sudo iptables -A INPUT -i lo -j ACCEPT
sudo iptables -A OUTPUT -o lo -j ACCEPT
sudo iptables -t nat -A POSTROUTING -o enp0s3 -j MASQUERADE
#DNS name resolution requests sent to outside servers and want a response:TODO:INPUT
sudo iptables -A FORWARD -i enp0s3 -p udp --sport 53 -m state --state ESTABLISHED,RELATED -j ACCEPT
#SSH connections to the router system that originate from the inside and want an answer:TODO:INPUT
sudo iptables -A FORWARD -i enp0s3 -o enp0s9 -p tcp --dport 22 -m state --state ESTABLISHED,RELATED -j ACCEPT
sudo iptables -A FORWARD -i enp0s3 -d 23.214.219.133 -p tcp --dport 22 -m state --state ESTABLISHED,RELATED -j ACCEPT
#The dns server should be able to resolve names using the internet (and others???)
sudo iptables -A FORWARD -i enp0s8 -o enp0s3 -s 23.214.219.129 -p udp --dport 53 -j ACCEPT
#The internal network should be able to send and recieve dns name resolutions to the dns server (1!)
sudo iptables -A FORWARD -i enp0s9 -o enp0s8 -d 23.214.219.129 -p udp --dport 53 -j ACCEPT
sudo iptables -A FORWARD -i enp0s8 -i enp0s9 -p udp --dport 53 -m state --state ESTABLISHED,RELATED -j ACCEPT
#The dns and dns2 servers should be able to synchronize the contents of DNS zones. (protocol tcp port 53)
sudo iptables -A FORWARD -i enp0s8 -o enp0s3 -d 193.137.16.75 -p tcp --dport 53 -j ACCEPT
sudo iptables -A FORWARD -i enp0s3 -o enp0s8 -d 23.214.219.129 -p tcp --dport 53 -j ACCEPT
#SMTP connections to the smtp server and returns
sudo iptables -A FORWARD -i enp0s9 -o enp0s8 -d 23.214.219.131 -p tcp --dport 587 -j ACCEPT
sudo iptables -A FORWARD -i enp0s8 -o enp0s9 -p tcp --dport 587 -m state --state ESTABLISHED,RELATED -j ACCEPT
#POP and IMAP connections to the www server
sudo iptables -A FORWARD -i enp0s9 -o enp0s8 -d 23.214.219.132 -p tcp --dport 80 -j ACCEPT
sudo iptables -A FORWARD -i enp0s9 -o enp0s8 -d 23.214.219.132 -p tcp --dport 443 -j ACCEPT
sudo iptables -A FORWARD -i enp0s8 -o enp0s9 -p tcp --dport 80 -m state --state ESTABLISHED,RELATED -j ACCEPT 
sudo iptables -A FORWARD -i enp0s8 -o enp0s9 -p tcp --dport 443 -m state --state ESTABLISHED,RELATED -j ACCEPT
#OpenVPN connections to the vpn-gw server
sudo iptables -A FORWARD -i enp0s9 -o enp0s8 -d 23.214.219.133 -p udp --dport 1194 -j ACCEPT
sudo iptables -A FORWARD -i enp0s8 -o enp0s9 -p udp --dport 1194 -j ACCEPT
#VPN clients connected to the gateway vpn-gw ???? vpn should be able to acess ftp e datastore
# Apartir daqui foi só para testar se as conecções funcionavam
sudo iptables -A FORWARD -i enp0s8 -s 23.214.219.129 -p tcp --sport 22 
# Unsure these will work
sudo iptables -A FORWARD -i enp0s9 -d 23.214.219.131