What is a DNS CNAME record?
The DNS CNAME record works as an alias for domain names that share a single IP address. A “canonical name” (CNAME) record points from an alias domain to a “canonical”…
What is blackhole routing?
Blackhole routing is a DDoS mitigation strategy that eliminates all traffic from specific sources. What is DDoS blackhole routing? DDoS blackhole routing/filtering (sometimes called blackholing), is a countermeasure to mitigate…
What is DNS? | How DNS works
DNS lets users connect to websites using domain names instead of IP addresses. Learn more about how DNS works. What is DNS? The Domain Name System (DNS) is the phonebook…
DNS root server
A DNS root server is the first stop in a DNS lookup. What is a DNS root server? The administration of the Domain Name System (DNS) is structured in a…
What is recursive DNS?
In DNS lookups, which match domain names to machine-readable IP addresses, the journey up the DNS tree can either be made by DNS. What is recursive DNS? A recursive DNS…
What is a WAN? | WAN vs. LAN
A wide area network (WAN) is any network that extends over a large geographic area, usually connecting multiple local area networks (LANs). What is a wide area network (WAN)? A…
What is a router?
A router is a networking device that connects two or more IP networks or subnetworks and connects various networked nodes. What is a router? A router is a device that…
Slowloris DDoS attack
The Slowloris attack attempts to overwhelm a targeted server by opening and maintaining many simultaneous HTTP connections to the target. What is a Slowloris DDoS attack? Slowloris is a denial-of-service…
Protocols, How They Work, Use Cases
Simple but effective “cheat sheet” on internet/networking protocols, simple examples of how they work, and use case scenarios for how a protocol would typically be used.
What is IP spoofing?
Spoofed IP packets with forged source addresses are often used in attacks to avoid detection. What is IP spoofing? IP spoofing is the creation of Internet Protocol (IP) packets with…