Cisco Systems OL-12172-01 manual Using the Transparent Firewall in Your Network, 15-9

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Chapter 15 Firewall Mode Overview

Transparent Mode Overview

Using the Transparent Firewall in Your Network

Figure 15-6shows a typical transparent firewall network where the outside devices are on the same subnet as the inside devices. The inside router and hosts appear to be directly connected to the outside router.

Figure 15-6 Transparent Firewall Network

Internet

 

10.1.1.1

Network A

Management IP

10.1.1.2

 

10.1.1.3

 

192.168.1.2

Network B

92411

Transparent Firewall Guidelines

Follow these guidelines when planning your transparent firewall network:

•A management IP address is required; for multiple context mode, an IP address is required for each context.

Unlike routed mode, which requires an IP address for each interface, a transparent firewall has an IP address assigned to the entire device. The security appliance uses this IP address as the source address for packets originating on the security appliance, such as system messages or AAA communications.

The management IP address must be on the same subnet as the connected network. You cannot set the subnet to a host subnet (255.255.255.255).

You can configure an IP address for the Management 0/0 management-only interface. This IP address can be on a separate subnet from the main management IP address.

•The transparent security appliance uses an inside interface and an outside interface only. If your platform includes a dedicated management interface, you can also configure the management interface or subinterface for management traffic only.

 

 

Cisco Security Appliance Command Line Configuration Guide

 

 

 

 

 

 

OL-12172-01

 

 

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Contents 15-1 IP Routing Support15-2 An Inside User Visits a Web Server15-3 An Outside User Visits a Web Server on the DMZ15-4 An Inside User Visits a Web Server on the DMZ15-5 An Outside User Attempts to Access an Inside Host15-6 DMZ User Attempts to Access an Inside HostAllowing Layer 3 Traffic Transparent Firewall NetworkAllowed MAC Addresses 15-7Passing Traffic Not Allowed in Routed Mode MAC Address vs. Route Lookups15-8 Using the Transparent Firewall in Your Network Transparent Firewall Guidelines15-9 15-10 Unsupported Features in Transparent Mode15-11 How Data Moves Through the Transparent Firewall15-12 8shows an inside user accessing an outside web server15-13 An Inside User Visits a Web Server Using NAT15-14 An Outside User Visits a Web Server on the Inside Network11 Outside to Inside 15-1515-16

OL-12172-01 specifications

Cisco Systems OL-12172-01 is a pivotal component in the landscape of networking and telecommunications, particularly catering to the needs of businesses seeking robust and efficient networking solutions. This particular offering is part of Cisco's ongoing commitment to providing advanced networking technologies that enhance connectivity, security, and overall operational efficiency.

One of the main features of Cisco OL-12172-01 is its capability to support enterprise networking environments through highly scalable and flexible architecture. The device is designed to address the growing demands for bandwidth and connectivity in corporate networks, enabling seamless communication and data exchange among various devices and applications. With support for high-speed Ethernet connections, the OL-12172-01 can significantly improve the performance of network operations, ensuring minimal downtime and optimal user experiences.

Security is a hallmark of the Cisco OL-12172-01. The device comes equipped with advanced security protocols that protect sensitive data and mitigate the risks associated with network vulnerabilities. Features such as integrated firewall capabilities, Virtual Private Network (VPN) support, and intrusion prevention systems are vital in safeguarding corporate information against cyber threats. This ensures that businesses can operate confidently in a digital landscape laden with potential risks.

Another significant aspect of the OL-12172-01 is its compatibility with various Cisco technologies, enhancing its versatility. It integrates seamlessly with Cisco’s Software-Defined Networking (SDN) solutions, allowing for dynamic network management and automation. This adaptability means businesses can respond quickly to changing network demands and efficiently manage resources without incurring excessive costs.

The OL-12172-01 also boasts comprehensive management and monitoring tools. Through Cisco's management software, network administrators can easily configure, monitor, and troubleshoot their networks. These tools provide insight into network performance metrics, enabling proactive measures to ensure optimal functionality.

In summary, Cisco Systems OL-12172-01 is a feature-rich device designed for modern enterprise networking. With advanced security measures, high-speed connectivity, and compatibility with cutting-edge technologies, it empowers businesses to optimize their network infrastructure while maintaining high levels of protection. As organizations continue to evolve their IT landscapes, the OL-12172-01 remains a reliable solution for enhancing operational efficiency and safeguarding essential data.
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