Redirecting All tcp port 80,443 traffic to webserver

[ray-faizan]

I want to achieve captive portal authentication for LAN clients. for that Want I want to do is traffic any traffic generated from LAN subnet to destination port 80 and 443 should be redirected to captive portal page.

So Captive portal page is running Nginx on VCL session layer. So I will be accessible using gateway IP address.

It Is similar to something that we are doing with iptables .

-A ChainX -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 8080
-A ChainX -p tcp -m tcp --dport 443 -j REDIRECT --to-ports 8443

Can someone help me to do that