<div>
<div class="content wysiwyg-content">
I have a Linksys RVO16 firewall, and need to lock down the SMTP. &nbsp;I only want SMTP traffic to come in from the outside from a couple of IP ranges. &nbsp;Can someone please tell me how to do this? &nbsp;
</div>
</div>


I have a Linksys RVO16 firewall, and need to lock down the SMTP.  I only want SMTP traffic to come in from the outside from a couple of IP ranges.  Can someone please tell me how to do this?  

Harden Firewall

Hardware-based firewalls provide more sophisticated protection for inbound and outbound traffic than the simple Windows software firewall or the basic NAT firewalls found in routers. These devices implement techniques such as stateful packet inspection, deep packet inspection, and content filtering; and may include built-in antivirus and anti-malware protection.

Hardware Firewalls

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.