Table of contents

  1. 0. CCNA Exam Questions
  2. 13 SSH : Secure SHell
    1. 13.3 Setting up hostnames and domain names !
  3. 14. IPv6
    1. 14.1 Overview
  4. Lab 5: NAT, SSH, ACL
  5. Simulation
    1. Simulation 42
    2. Simulation 31

Lesson 9 - CCNA Fast Track (June, 2025). We left off at page 163. It ends at the top of pg 186.

0. CCNA Exam Questions

  1. There are alternative ways to hash/encrypt passwords where 0 = Unencrypted secret, 5 = MDS Hashed secret, 8 PBKDF2 Hashed Secret, 9 SCRYPT Hashed secret

13 SSH : Secure SHell

13.3 Setting up hostnames and domain names !

  • Recall, this is our topology:
  • Method 1: Please perform the following on R1
      conf t
  username user1 secret pass1
  line vty 0 4
  login local
  transport input ssh
  end
  • Let’s break it down a bit…
    • username user1 secret pass1 = username and password
    • line vty 0 4 vty: Multiple entries into Router user mode, referring to diagram pt. 2 from page 18
    • login local : login w/ local user info (i.e. user1 pass1)
    • transport input ssh: limits only ssh to enter the 5 vtysm and limits virtual terminals to accept SSH connections only
  • Remarks:
    • Cisco IOS ssh servers requires username based auth, hence need username-password pair (i.e. user1, pass1)
  • Method 2: Bash or encrypt the password
  • Here are the possible methods to setup your secrets
      Router1(config)# username user1 secret ?
  0 specifies a UNENCRYPTED secret will follow
  5 specifies a MDS Hashed secret will follow
  8 specifies a PBKDF2 Hashed Secret will follow
  9 specifies a SCRYPT Hashed secret will follow
  • On R2, privilage mode ssh -l user1 192.168.1.1 (i.e. Trying to access R1 from R2 via ssh) and enter the password and it should work :D

14. IPv6

14.1 Overview

  • IPv6 = latest verion of IP (= Internet Protocol)

Lab 5: NAT, SSH, ACL

Simulation

Simulation 42

Simulation 31