Notes for Computer Information Technology 160
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nov26.md 877B

November 21

Overview

  • SSL/TLS

    • cleanup
  • Tools

    • $ nc
    • $ cURL
    • $ openSSL s_client
  • HTTP

    • Request Header
    • Response Header
    • Protocol
    • Status Codes

If the public key of an ssh server changes you will get a DNS spoofing warning.

ssh-keygen is a tool for creating new authentication key pairs for SSH. Such key pairs are used for automating logins, single sign-on, and for authenticating hosts.

SSL/TLS

  • SSL 2.0 came out in 1995
  • SSL 3.0 came out in 1996
  • TLS 1.0 came out in 1999
  • TLS 1.2 came out in 2008 (9 years later)

  • https - the S can be SSL or TLS