Network setup, two network cards?

Question

Debian

Good afternoon, I have two ports in the server, the first port is a van port, the second port needs to be done so that it is a local network and it has access to the Internet from the first port, how to implement it?

Answer 1

https://www.google.com/search?q=masquerading+iptables

Answer 2

write this
sudo iptables --flush
sudo iptables --table nat --flush
sudo iptables --delete-chain
sudo iptables --table nat --delete-chain
sudo iptables -A FORWARD -i eth0 -o eth1 -s 192.168.1.0 /24 (set your LAN network address) -m conntrack --ctstate NEW -j ACCEPT
sudo iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
sudo iptables -A POSTROUTING -t nat -j MASQUERADE
sudo sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward"

Answer 3

install kerio pfsense