Intro to Firewalls
Intro to Small Home Networking
Key Vocabulary and Concepts
- DHCP vs Static IP assignment
- DHCP reservation
- Switch Vs Router
- LAN – local area network (LAN) is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building and has its network equipment and interconnects locally managed
- WAN – a telecommunications network or computer network that extends over a large geographical distance.
- VLAN – A virtual LAN (VLAN) is any broadcast domain that is partitioned and isolated in a computer network at the data link layer (OSI layer 2).
- DMZ- In computer security, a DMZ or demilitarized zone (sometimes referred to as a perimeter network) is a physical or logical subnetwork that contains and exposes an organization’s external-facing services to an untrusted network, usually a larger network such as the Internet.
- DNS – is a hierarchical decentralized naming system for computers, services, or other resources connected to the Internet or a private network.
- Internal VS external IP address
- NAT -Network address translation (NAT) is a method of remapping one IP address space into another by modifying network address information in Internet Protocol (IP) datagram packet headers while they are in transit across a traffic routing device.
- Port forwarding – port forwarding or port mapping is an application of network address translation (NAT) that redirects a communication request from one address and port number combination to another while the packets are traversing a network gateway, such as a router or firewall.
- Why they are a good tool
Intro to Firewalls
- What is a firewall?
- Why would I want to use one?
- Extra Security
- Packet inspection
- Restricting connections to your home network
What do I need to build one at home (bare minimum)?
- Pre Built PFSense appliance
- Computer (FreakBox?)
- Extra NIC card
- A Switch
- A solid understanding of SOHO networking
- Initial Rule Configuration
- Block vs Reject
- Some basic rules to add in:
- Port Blocking
- Country Blocking
- Known bad IP blocking
Useful command line commands
Resources for advanced configuration, tips, tricks and troubleshooting.