Custom

IPS

 

 

idle_timeout

If a session is idle for longer than this number of seconds, the session will

 

not be maintained by tcp_reassembler.

min_ttl

A packet with a higher ttl number in its IP header than the number specified

 

here is not processed by tcp_reassembler.

port_list

A comma separated list of ports. The dissector can decode these TCP ports.

bad_flag_list

A comma separated list of bad TCP flags.

reassembly_

Valid settings are from-server, from-client, or both.

direction

 

codepoint

A number from 0 to 63. Used for differentiated services tagging. When the

 

action for p2p and im signatures is set to Pass, the FortiGate unit checks the

 

codepoint. If the codepoint is set to a number from 1 to 63, the codepoint for

 

the session is changed to the specified value. If the codepoint is set to -1

 

(the default) no change is made to the codepoint in the IP header.

Custom

You can create custom IPS signatures. The custom signatures you create are added to a single Custom signature group.

Custom signatures provide the power and flexibility to customize the FortiGate IPS for diverse network environments. The FortiGate predefined signatures cover common attacks. If you are using an unusual or specialized application or an uncommon platform, you can add custom signatures based on the security alerts released by the application and platform vendors.

You can also use custom signatures to block or allow specific traffic. For example to block traffic containing pornography, you can add custom signatures similar to the following:

F-SBID (--protocol tcp; --flow established; --content "nude cheerleader"; --no_case) When you add the signature set action to Drop Session.

For more information on custom signature syntax see the FortiGate IPS Custom Signatures Technical Bulletin.

Note: Custom signatures are an advanced feature. This document assumes the user has previous experience creating intrusion detection signatures.

Custom signature list

Figure 147:The custom signature group

Enable custom signature

Create New

Select the Enable custom signature box to enable the custom signature group or clear the Enable custom signature box to disable the custom signature group.

Select Create New to create a new custom signature.

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100A specifications

Fortinet 100A is a versatile network security device designed to provide comprehensive protection against various cyber threats while ensuring optimal network performance. As part of the FortiGate series, the 100A combines advanced security features with powerful hardware capabilities, making it suitable for small to medium-sized businesses.

One of the key features of the Fortinet 100A is its deep packet inspection technology. This capability allows the firewall to analyze both the header and payload of packets traversing the network, enabling it to detect and block malicious content effectively. The 100A can identify and mitigate a wide range of threats, including malware, intrusions, and application-layer attacks.

The FortiOS operating system powers the Fortinet 100A, offering a robust and user-friendly interface for configuration and management. With its unified security management console, administrators can efficiently monitor network traffic and enforce security policies across the organization. The system provides centralized logging and reporting features, enabling users to gain valuable insights into their security posture and respond swiftly to incidents.

The 100A supports multiple deployment modes, including transparent, NAT, and route modes. This flexibility allows organizations to integrate the device into their existing network architecture with ease. The firewall's high throughput capabilities ensure that network performance remains unaffected, even under heavy load from multiple users and devices.

Another notable aspect of the Fortinet 100A is its support for various VPN technologies, including IPsec and SSL VPN. This feature facilitates secure remote access for employees, enabling them to connect to the corporate network safely, regardless of their location. As remote work continues to be a norm in many sectors, this capability is critical for maintaining productivity and security.

In addition to these features, the Fortinet 100A provides comprehensive web filtering capabilities, protecting users from harmful websites and inappropriate content. This protection is essential for organizations looking to maintain a secure and productive environment.

With its combination of powerful security features, flexible deployment options, and robust performance, the Fortinet 100A stands out as an ideal solution for organizations seeking to bolster their cybersecurity measures while ensuring seamless connectivity for users. As cyber threats continue to evolve, investing in a capable device like the FortiGate 100A is crucial for maintaining a secure network infrastructure.
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