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CCIE Security Exam Quick Reference Sheets by Lancy Lobo, Umesh Lakshman

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Chapter 3. Application Protocols

HTTP

  • HTTP is a request/response protocol between clients (user agents) and servers (origin servers).
  • An HTTP client initiates a request by establishing a TCP connection to a particular port on a remote host (port 80 by default). Resources to be accessed by HTTP are identified using Uniform Resource Identifiers (URI or URL) using the http: or https: URI schemes.
  • HTTP supports authentication between clients and servers, which involves sending a clear-text password (therefore, it is not considered secure). HTTP is disabled by default on Cisco routers but can be enabled for remote monitoring and configuration.

Configuring HTTP

  • Use the ip http access-class command to restrict access to certain selected IP addresses ...

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