Cisco ICND1

6.0 Network Device Security

• 6.1 Configure and verify network device security features
  
  
  • 6.1.a Device password security
    
    
  • 6.1.b Enable secret vs. enable
    
    
  • 6.1.c Transport
    
    
    • 6.1.c (i) Disable telnet
      
      
    • 6.1.c (ii) SSH
      
      

      Secure Shell (SSH) is a cryptographic remote login protocol for secure data communication over an unsecured network. Designed as a replacement for telnet and rlogin, which send information in plaintext, SSH client and server programs provide strong host-to-host and user authentication as well as a number of securely encrypted methods of communication to provide confidentiality and integrity of data. SSH supports data stream compression between the client and the server.

      There are two major versions of the SSH protocol in widespread use, SSH v1 and SSH v2. SSH v2 is more secure, and includes SFTP, which is similar to FTP, but is SSH v2 encrypted.

      Configuring Secure Shell on Routers and Switches Running Cisco IOS
      
      
  • 6.1.d VTYs
    
    
  • 6.1.e Physical security
    
    
  • 6.1.f Service password
    
    
  • 6.1.g Describe external authentication methods