What are the types of firewalls?

1.  Packet Filtering Firewall: This type of Firewall detects packets and block unnecessary packets and makes network traffic release.

2.   Screening Router Firewalls: It's a software base firewall available in Router provides only light filtering.

3.    Computer-based Firewall : It's a firewall stored in server with an existing Operating System like Windows and UNIX.

4.  Hardware base Firewall: Its device like box allows strong security from public network. Mostly used by big networks.

5.   Proxy Server: Proxy server allows all clients to access Internet with different access limits. Proxy server has its own firewall which filters the all packet from web server.