Chapter 24 Troubleshooting Connections and Resources

Testing Your Configuration

Determining Packet Routing with Traceroute

The Traceroute tool helps you to determine the route that packets will take to their destination. The tool prints the result of each probe sent. Every line of output corresponds to a TTL value in increasing order. The following table lists the output symbols printed by this tool.

Output Symbol

Description

 

 

*

No response was received for the probe within the timeout period.

 

 

nn msec

For each node, the round-trip time (in milliseconds) for the specified number of

 

probes.

 

 

!N.

ICMP network unreachable.

 

 

!H

ICMP host unreachable.

 

 

!P

ICMP unreachable.

 

 

!A

ICMP administratively prohibited.

 

 

?

Unknown ICMP error.

 

 

To use the Traceroute tool, perform the following steps:

Step 1 In the main ASDM application window, choose Tools > Traceroute.

The Traceroute dialog box appears.

Step 2 Enter hostname or IP address to which the route is traced. If the hostname is given, define it by choosing Configuration > Firewall > Objects > Service Objects/Groups, or configure a DNS server to enable this tool to resolve the hostname to an IP address.

Step 3 Enter the amount of time in seconds to wait for a response before the connection times out. The default is three seconds.

Step 4 Type the destination port used by the UDP probe messages. The default is 33434.

Step 5 Enter the number of probes to be sent at each TTL level. The default is three.

Step 6 Specify the minimum and maximum TTL values for the first probes. The minimum default is one, but it can be set to a higher value to suppress the display of known hops. The maximum default is 30. The traceroute terminates when the packet reaches the destination or when the maximum value is reached.

Step 7 Check the Specify source interface or IP address check box. Choose the source interface or IP address for the packet trace from the drop-down list. This IP address must be the IP address of one of the interfaces. In transparent mode, it must be the management IP address of the ASA.

Step 8 Check the Reverse Resolve check box to have the output display the names of hops encountered if name resolution is configured. Leave this check box unchecked to have the output display IP addresses.

Step 9 Check the Use ICMP check box to specify the use of ICMP probe packets instead of UDP probe packets. Step 10 Click Trace Route to start the traceroute.

The Traceroute Output area displays detailed messages about the traceroute results.

Step 11 Click Clear Output to start a new traceroute.

Cisco ASA Series Firewall ASDM Configuration Guide

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Cisco Systems ASA 5555-X, ASA 5505, ASA 5545-X Determining Packet Routing with Traceroute, Output Symbol Description, 24-6
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ASA Services Module, ASA 5555-X, ASA 5545-X, ASA 5585-X, ASA 5580 specifications

Cisco Systems has long been a leader in the field of network security, and its Adaptive Security Appliance (ASA) series is a testament to this expertise. Within the ASA lineup, models such as the ASA 5505, ASA 5580, ASA 5585-X, ASA 5545-X, and ASA 5555-X stand out for their unique features, capabilities, and technological advancements.

The Cisco ASA 5505 is designed for small businesses or branch offices. It provides essential security features such as firewall protection, flexible VPN capabilities, and intrusion prevention. The ASA 5505 supports a user-friendly interface, allowing for straightforward management. Its built-in threat detection and prevention tools provide a layered defense, and with scalability in mind, it can accommodate various expansion options as organizational needs grow.

Moving up the line, the ASA 5580 delivers greater throughput and advanced security features. This model is suited for medium to large enterprises that require robust protection against increasingly sophisticated threats. Its multi-core architecture allows it to manage high volumes of traffic seamlessly while maintaining excellent performance levels. The ASA 5580 also supports application-layer security and customizable access policies, making it highly adaptable to diverse security environments.

The ASA 5585-X further enhances Cisco's security offerings with advanced malware protection and extensive security intelligence capabilities. It incorporates next-generation firewall features, including context-aware security, and supports advanced threat detection technologies. This model is ideal for large enterprises or data centers that prioritize security while ensuring uninterrupted network performance and availability.

For enterprises requiring a balance of performance and security, the ASA 5545-X presents a compelling option. This model features scalable performance metrics, high availability, and integrated advanced threat protection. Coupled with advanced endpoint protection and detailed monitoring capabilities, the ASA 5545-X enables organizations to manage their security posture effectively.

Lastly, the ASA 5555-X blends cutting-edge technologies with strong security infrastructures. It boasts high throughput and the ability to execute deep packet inspections. Its sophisticated architecture supports threat intelligence feeds that provide real-time security updates, making it a powerful tool against modern threats.

Each of these Cisco ASA models brings specific advantages to varied environments. Their integrative capabilities enable businesses to enhance their security postures while benefiting from seamless scalability and management. As cybersecurity threats evolve, these advanced appliances play a vital role in protecting valuable digital assets.
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