Podcast
Questions and Answers
How does a network-based IPS primarily operate regarding traffic analysis?
How does a network-based IPS primarily operate regarding traffic analysis?
- By inspecting traffic in real-time as it traverses the network. (correct)
- By only examining traffic at the application layer to detect exploits.
- By analyzing stored traffic logs to identify suspicious patterns.
- By mirroring traffic to a separate device for analysis.
Which statement accurately differentiates between IDS and IPS technologies?
Which statement accurately differentiates between IDS and IPS technologies?
- IDS passively monitors network traffic, while IPS actively prevents identified threats. (correct)
- IDS and IPS both actively block traffic, but IDS has a higher impact on network performance.
- IDS focuses on preventing external threats, while IPS is designed for internal threat detection.
- IDS operates in-line, actively blocking malicious traffic, while IPS monitors passively.
What is a primary disadvantage of host-based IPS (HIPS) compared to network-based IPS?
What is a primary disadvantage of host-based IPS (HIPS) compared to network-based IPS?
- HIPS is ineffective against encrypted traffic.
- HIPS requires installation on every host, increasing administrative overhead. (correct)
- HIPS has a higher cost to implement and maintain.
- HIPS cannot protect against zero-day attacks.
What is the key characteristic of a 'zero-day' attack that makes it particularly challenging to defend against?
What is the key characteristic of a 'zero-day' attack that makes it particularly challenging to defend against?
An administrator notices numerous false positive alarms on the IPS. What action should the administrator take to address this issue?
An administrator notices numerous false positive alarms on the IPS. What action should the administrator take to address this issue?
Which type of IPS signature examines multiple packets over time to identify malicious activity?
Which type of IPS signature examines multiple packets over time to identify malicious activity?
What is the purpose of using SPAN (Switched Port Analyzer) in network monitoring?
What is the purpose of using SPAN (Switched Port Analyzer) in network monitoring?
When evaluating different vendor IPS solutions, which factor is the MOST important to consider alongside the security budget?
When evaluating different vendor IPS solutions, which factor is the MOST important to consider alongside the security budget?
What is a potential disadvantage of using anomaly-based detection in an IPS?
What is a potential disadvantage of using anomaly-based detection in an IPS?
In the context of IPS actions, what does 'Request Block Connection' typically accomplish?
In the context of IPS actions, what does 'Request Block Connection' typically accomplish?
IDS operates in inline mode, actively blocking malicious traffic as it passes through the network.
IDS operates in inline mode, actively blocking malicious traffic as it passes through the network.
A key advantage of an IDS is that its deployment typically has a direct impact on network performance, ensuring thorough inspection of all traffic.
A key advantage of an IDS is that its deployment typically has a direct impact on network performance, ensuring thorough inspection of all traffic.
A zero-day attack refers to an exploit that leverages a vulnerability known by both the vendor and the security community, allowing quick patching.
A zero-day attack refers to an exploit that leverages a vulnerability known by both the vendor and the security community, allowing quick patching.
Cisco SPAN (Switched Port Analyzer) is used to mirror network traffic from one or more ports to a dedicated port for analysis by an IDS or IPS system.
Cisco SPAN (Switched Port Analyzer) is used to mirror network traffic from one or more ports to a dedicated port for analysis by an IDS or IPS system.
Network-based IPS can effectively examine encrypted traffic without requiring decryption, providing visibility into potential threats within secure communications.
Network-based IPS can effectively examine encrypted traffic without requiring decryption, providing visibility into potential threats within secure communications.
A signature in IPS is a single, unchangeable attribute.
A signature in IPS is a single, unchangeable attribute.
Atomic signatures in IPS are designed to detect patterns across multiple network packets, offering a comprehensive view of potential threats.
Atomic signatures in IPS are designed to detect patterns across multiple network packets, offering a comprehensive view of potential threats.
In IPS, a 'false negative' alarm indicates that an attack occurred, and the IPS correctly generated an alarm.
In IPS, a 'false negative' alarm indicates that an attack occurred, and the IPS correctly generated an alarm.
The primary goal of 'request block host' action in IPS is to permit traffic based on configured exceptions.
The primary goal of 'request block host' action in IPS is to permit traffic based on configured exceptions.
Security budget has no impact on the selection and deployment of IPS sensors.
Security budget has no impact on the selection and deployment of IPS sensors.
What is the primary goal of endpoint security in a borderless network environment?
What is the primary goal of endpoint security in a borderless network environment?
Which technology provides features such as spam filtering and outbound message control?
Which technology provides features such as spam filtering and outbound message control?
How does deploying multiple security technologies enhance Endpoint Security?
How does deploying multiple security technologies enhance Endpoint Security?
Which Layer 2 attack involves an attacker flooding the switch's MAC address table with bogus MAC addresses?
Which Layer 2 attack involves an attacker flooding the switch's MAC address table with bogus MAC addresses?
Why is it important to configure port security on a switch?
Why is it important to configure port security on a switch?
Which port security violation mode drops traffic from unauthorized MAC addresses and increments the violation counter?
Which port security violation mode drops traffic from unauthorized MAC addresses and increments the violation counter?
What is the primary purpose of DHCP snooping?
What is the primary purpose of DHCP snooping?
In a network with DHCP snooping enabled, how are ports typically configured to differentiate between legitimate and potentially malicious DHCP traffic?
In a network with DHCP snooping enabled, how are ports typically configured to differentiate between legitimate and potentially malicious DHCP traffic?
What type of Layer 2 attack involves an attacker overwhelming a DHCP server by sending numerous requests for IP addresses, exhausting the available address pool?
What type of Layer 2 attack involves an attacker overwhelming a DHCP server by sending numerous requests for IP addresses, exhausting the available address pool?
Which action does Cisco's AMP (Advanced Malware Protection) take before a potential malware attack?
Which action does Cisco's AMP (Advanced Malware Protection) take before a potential malware attack?
Cisco AMP focuses on security measures applied before, during, and after a malware attack.
Cisco AMP focuses on security measures applied before, during, and after a malware attack.
In a CAM table overflow attack, macof
is used to flood a switch with legitimate MAC addresses, overwhelming the switch's memory.
In a CAM table overflow attack, macof
is used to flood a switch with legitimate MAC addresses, overwhelming the switch's memory.
Implementing DHCP snooping involves configuring switch ports as either 'trusted' or 'protected' to filter DHCP traffic.
Implementing DHCP snooping involves configuring switch ports as either 'trusted' or 'protected' to filter DHCP traffic.
Cisco Email Security solutions offer solely spam blocking and inbound message control.
Cisco Email Security solutions offer solely spam blocking and inbound message control.
Host-based protection methods include antivirus/antimalware, spam filtering and URL filtering.
Host-based protection methods include antivirus/antimalware, spam filtering and URL filtering.
In port security, 'Protect' violation mode increases the violation counter, sends a syslog message, and shuts down the port.
In port security, 'Protect' violation mode increases the violation counter, sends a syslog message, and shuts down the port.
NAC authenticates users and enforces network security policies, but does not assess endpoint compliance.
NAC authenticates users and enforces network security policies, but does not assess endpoint compliance.
Traditional endpoint security primarily relies on perimeter firewalls and network intrusion prevention systems.
Traditional endpoint security primarily relies on perimeter firewalls and network intrusion prevention systems.
A DHCP starvation attack occurs when a rogue DHCP server provides incorrect IP configuration information to clients.
A DHCP starvation attack occurs when a rogue DHCP server provides incorrect IP configuration information to clients.
Layer 3 vulnerabilities are mitigated using ethernet frames and MAC address filtering.
Layer 3 vulnerabilities are mitigated using ethernet frames and MAC address filtering.
Flashcards
Zero-Day Attack
Zero-Day Attack
An attack that exploits a vulnerability before a patch is available.
IDS (Intrusion Detection System)
IDS (Intrusion Detection System)
Operates passively, mirroring traffic for analysis without directly intervening.
IPS (Intrusion Prevention System)
IPS (Intrusion Prevention System)
Operates inline, actively blocking or preventing malicious traffic.
Atomic Signature
Atomic Signature
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Composite Signature
Composite Signature
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False Positive
False Positive
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False Negative
False Negative
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True Positive
True Positive
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True Negative
True Negative
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Monitor Session Command
Monitor Session Command
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IDS Operation
IDS Operation
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IPS Function
IPS Function
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Network-Based IPS advantages
Network-Based IPS advantages
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IPS inline mode
IPS inline mode
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Promiscuous mode
Promiscuous mode
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Signature
Signature
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Policy-based detection advantages
Policy-based detection advantages
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Anomaly-based Detection Advantages
Anomaly-based Detection Advantages
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Endpoint Security
Endpoint Security
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Antivirus/Antimalware Software
Antivirus/Antimalware Software
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URL Filtering
URL Filtering
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Blacklisting
Blacklisting
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Cisco NAC
Cisco NAC
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Spam Blocking
Spam Blocking
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Mitigating CAM Table Attacks
Mitigating CAM Table Attacks
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CAM Table Overflow Attack
CAM Table Overflow Attack
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DHCP Starvation Attack
DHCP Starvation Attack
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DHCP Spoofing Attack
DHCP Spoofing Attack
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What is Endpoint Security?
What is Endpoint Security?
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Antimalware Software
Antimalware Software
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What is URL Filtering?
What is URL Filtering?
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What is Blacklisting?
What is Blacklisting?
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Data Encryption
Data Encryption
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What is Spam Blocking?
What is Spam Blocking?
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What is Cisco NAC?
What is Cisco NAC?
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Switch Flooding
Switch Flooding
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What is DHCP Spoofing?
What is DHCP Spoofing?
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IP Source Guard
IP Source Guard
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Study Notes
Chapter 6: Securing the Local Area Network
- This chapter covers endpoint security and layer 2 security threats
6.1 Endpoint Security
- This section introduces endpoint security, Cisco AMP, and Cisco NAC for authenticating and enforcing network security policies.
Securing LAN Elements
- LAN elements include the internet, web server, email server, VPN, firewall, perimeter, ESA/WSA, DNS, IPS, hosts and ACS
Traditional Endpoint Security
- Traditional endpoint security is comprised of three elements
- Host-based IPS
- Antivirus/Antimalware Software
- Host-based firewall
Securing Endpoints in the Borderless Network
- Post Malware questions include determining source, threat method, entry point, affected systems, and the nature/prevention/recovery of the threat
- Host-Based Protection includes antivirus/antimalware, SPAM filtering, URL filtering, and blacklisting.
Modern Endpoint Security Solutions
- Modern endpoint security includes AMP, NAC, ESA, and WSA.
6.1.2 Antimalware Protection
- Protects against malware
Advanced Malware Protection
- Advanced malware protection works “Before, During, and After”
- Discover, Enforce, and harden (Before)
- Detect, Block, and Defend (During)
- Scope, Contain, and Remediate (After)
AMP and Managed Threat Defense
- Talos teams gather real-time threat intelligence.
- 1.6 million deployed security devices, including firewall, IPS, web, and email appliances
- 150 million endpoints are used by Talos teams to gather real-time threat intelligence
- They analyze data: 100 TB of security intelligence daily, 13 billion web requests per day, and 35% of the world's enterprise email traffic.
6.1.3 Email and Web Security
- Secures email and web
Cisco Email Security Appliance
- Cisco Email Security solutions include Spam blocking, advanced malware protection, and outbound message control.
Cisco Web Security Appliance
- The client initiates a web request, the WSA forwards the request, and a reply is sent to WSA and then to the client.
6.1.4 Controlling Network Access
- This involves controlling network access
Cisco NAC Functions
- NAC functions allow to control network access
- Enforcement of network access policies
6.2 Layer 2 Security Considerations
- It is important to understand Layer 2 vulnerabilities and how to mitigate CAM table overflow attacks.
- VLAN Trunk security, DHCP snooping, dynamic ARP inspection and IP Source Guard mitigate other attacks.
6.2.1 Layer 2 Security Threats
- Ethernet frames operates at the Data Link Layer
Switch Attack Categories
- CAM Table Attacks
- STP Attacks
- VLAN Attacks
- Address Spoofing Attacks
- DHCP Attacks
- ARP Attacks
6.2.2 CAM Table Attacks
- Attackers add bogus addresses to the CAM table until it is full
- This causes the switch to flood all traffic and allow the attacker to capture the traffic
CAM Table Attack Tools
- Macof is a CAM Table Attack Tool
6.2.3 Mitigating CAM Table Attacks
- Configure countermeasures for CAM Table Attacks
Port Security
- Port security enables
- Allows to enable command
- Allows to choose aging commands
- Allows to choose max secure addresses
- Allows to choose security violation mode
Port Security Options
- Configuration options include setting the maximum number of MAC addresses, manually configuring MAC addresses, and dynamically learning connected MAC addresses.
Port Security Violations
- Security Violation Modes include Protect, Restrict, and Shutdown.
6.2.3 Mitigating DHCP Attacks
- Prevents any DHCP attacks.
DHCP Spoofing Attack
- Spoofing the DHCP server
DHCP Starvation Attack
- Attacker initiates a starvation attack
- DHCP server will offer parameters
- Client requests all offers
- DHCP server acknowledges all requests
Configuring DHCP Snooping
- Trusted ports are needed for DHCP servers.
- Untrusted ports are used for DHCP Clients
Configuring DHCP Snooping Example
- Command example to configure a maximum number of MAC addresses
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