> 
> **Possible Duplicate:**  
> 
> [iptables to block https websites](https://unix.stackexchange.com/questions/28851/iptables-to-block-https-websites) 
> 
> 
> 

I am using Zentyal Os as a firewall, it working fine like blocking http sites and but I am not able to block https facebook site.
My only aim is need to block https facebook site, like need to block 443 port.

So is there any chance control using iptables with transparent mode.