# 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 
# IP:
# - dns : 23.214.219.129
# - dns2 : 23.214.219.130
# - smtp : 23.214.219.131
# - www : 23.214.219.132
# -
sudo ifconfig enp0s8 23.214.219.254 netmask 255.255.255.128
sudo ifconfig enp0s9 192.168.10.254 netmask 255.255.255.128
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: //O ip ainda tem de mudar
sudo iptables -A FORWARD -i enp0s8 -o enp0s3 -s 23.214.219.129 -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:É preciso outra regra uma para a port enp0s9 e o ip do vpn
sudo iptables -A FORWARD -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
sudo iptables -A FORWARD -i enp0s8 -o enp0s3 -s 23.214.219.130 -p udp --dport 53 -j ACCEPT
# 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 -s 23.214.219.131


#There might be a need to foward and input to, because of the nat?
#Dont use static ip address for internet related rules 
sudo ifconfig enp0s8 23.214.219.129 netmask 255.255.255.128
sudo ip route add default via 23.214.219.254