Chapter 10. HTTP and DNS
In this chapter, we will go through the following recipes:
- Filtering DNS traffic
- Analyzing regular DNS operations
- Analyzing DNS problems
- Filtering HTTP traffic
- Configuring HTTP preferences
- Analyzing HTTP problems
- Exporting HTTP objects
- HTTP flow analysis and the Follow TCP Stream window
- Analyzing HTTPS traffic – SSL/TLS basics
Introduction
Domain Name System (DNS) is a protocol that is used for resolving names to the IP addresses. It is used over the Internet when you browse a website, and then the DNS resolves the web server name to an IP address. It is also used in enterprise networks when looking for a server name that is translated to an IP address.
Hyper Text Transfer Protocol (HTTP) and Secured HTTP (HTTPS) are both used for browsing the Internet, or connecting to other software that are hosted inside your organization or in the cloud. HTTPS is used when we secure HTTP with SSL/TLS in order to hide the clear text data exchange from hacking. It is used...
