For schools or businesses that allow access only to internal resources and web pages, blocking the internet is important.
In this video, I show you a simple way to block internet and web from unknown devices while still giving access to computers and devices you trust. We will be covering the following points
- – Add a Firewall Alias for 3CX Phone System
- – Add a firewall alias for trusted computers
- – Allow outbound traffic for 3CX and trusted computers
- – Block all other devices for standard web browsing and email traffic
To find out more about the PFSense SG2440, visit:
https://www.buyphonesonline.ca/collections/firewalls-routers-and-security-gateway-appliances/products/pfsense-sg2440-firewall-and-security-gateway-appliance
Firewall Ports to block for web browsing and email. These ports are all TCP.
- 80 – HTTP Standard Internet
- 443 – HTTPS Encrypted Internet
- 25 – Outbound Email
- 2525 – Outbound Email Alternate
- 465 – Outbound Email Encrypted
- 587 – Outbound Email Encrypted Alternate
- 110 – Inbound Email POP3
- 995 – Inbound Email POP3 Encrypted
- 143 – Inbound Email IMAP
-
993 – Inbound Email IMAP Encrypted.
