Podcast
Questions and Answers
What is the primary function of NAT ALG?
What is the primary function of NAT ALG?
- To provide backup modes for device configurations.
- To synchronize device configurations after a restart.
- To apply NAT rules to application layer packets. (correct)
- To manage network security through AAA.
Which item is typically NOT part of the configuration that is backed up for a network device?
Which item is typically NOT part of the configuration that is backed up for a network device?
- System configurations
- User personal files (correct)
- Address mapping table
- Server map table
What are the 3 supported firewall authentication modes?
What are the 3 supported firewall authentication modes?
- Local, remote, and automatic
- Non-authentication, Local, and automatic
- Non-authentication, Local, and remote (correct)
- Local, remote, and manual
What feature is enabled by default when HRP is enabled?
What feature is enabled by default when HRP is enabled?
Which of the following best describes the purpose of AAA in network management?
Which of the following best describes the purpose of AAA in network management?
What is the NAS’s role within AAA architecture?
What is the NAS’s role within AAA architecture?
What kind of content is encompassed by 'authorization' on a firewall?
What kind of content is encompassed by 'authorization' on a firewall?
Which firewall accounting mode is supported?
Which firewall accounting mode is supported?
Flashcards
What is NAT ALG?
What is NAT ALG?
A technology used to translate private IP addresses to public IP addresses, allowing intranet servers to be accessed from the internet.
What is a Server Mapping Table?
What is a Server Mapping Table?
A table used to store mappings between public and private IP addresses, allowing for secure access to private resources.
What is AAA (Authentication, Authorization, Accounting)?
What is AAA (Authentication, Authorization, Accounting)?
A configuration mode that manages network security and access control, using three key mechanisms: authentication, authorization, and accounting.
What is 'Authorization' in AAA?
What is 'Authorization' in AAA?
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What is a NAS (Network Access Server)?
What is a NAS (Network Access Server)?
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What is 'Remote Authentication' in a firewall?
What is 'Remote Authentication' in a firewall?
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What is 'Accounting' in AAA?
What is 'Accounting' in AAA?
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What is 'Remote Authorization' in a firewall?
What is 'Remote Authorization' in a firewall?
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Study Notes
NAT (Network Address Translation)
- NAT ALG (Application Layer Gateway) is used to translate application layer packets
- NAT Server translates public IP addresses to private IP addresses, allowing internet users to access intranet servers
- NAT is a static destination address translation
AAA (Authentication, Authorization, Accounting)
- AAA is a network security management mechanism
- Authentication determines user network access
- Authorization grants users access to services
- Accounting records resource usage by users
- AAA can be managed locally or through an external server (RADIUS Server)
- AAA uses a user, NAS, and AAA server architecture
- NAS (Network Access Server) centralizes user access requests
- Common NAS devices like switches and firewalls
- AAA server centralizes user information
- Firewalls support several authentication and authorization modes including
- Non-authentication
- Local authentication
- Remote authentication
- Authorization includes user groups, VLANs, and ACLs, restricting services available
- Firewalls support several accounting modes including
- Non-accounting
- Remote accounting
NAT Server Configuration
- Backup modes: automatic and manual
- Automatic backups are triggered when Heartbeat Protocol (HRP) is enabled.
- Manual backups are triggered by the administrator
- Configuration includes quick session backup for load balancing
- Configuration status information includes session table, server map table, blacklist, whitelist, address mapping table, MAC address table, user table, IPSEC SA, and tunnel status
NAT Server Operation
- Heartbeat Protocol (HRP) is enabled by default
- Heartbeat Interface has 5 states (valid, down, peer down, ready, running)
- Preemption delay is 60 seconds
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