Chapter 12 Configuring Inspection for Voice and Video Protocols

SIP Inspection

•Description—Enter the description of the SIP map, up to 200 characters in length.

•Security Level—Shows the security level settings to configure

•Filtering—Tab that lets you configure the filtering settings for SIP.

–Enable SIP instant messaging (IM) extensions—Enables Instant Messaging extensions. Default is enabled.

–Permit non-SIP traffic on SIP port—Permits non-SIP traffic on SIP port. Permitted by default.

•IP Address Privacy—Tab that lets you configure the IP address privacy settings for SIP.

–Hide server’s and endpoint’s IP addresses—Enables IP address privacy. Disabled by default.

•Hop Count—Tab that lets you configure the hop count settings for SIP.

–Ensure that number of hops to destination is greater than 0—Enables check for the value of Max-Forwards header is zero.

Action—Drop packet, Drop Connection, Reset, Log. Log—Enable or Disable.

•RTP Conformance—Tab that lets you configure the RTP conformance settings for SIP.

–Check RTP packets for protocol conformance—Checks RTP/RTCP packets flowing on the pinholes for protocol conformance.

Limit payload to audio or video, based on the signaling exchange—Enforces payload type to be audio/video based on the signaling exchange.

•SIP Conformance—Tab that lets you configure the SIP conformance settings for SIP.

–Enable state transition checking—Enables SIP state checking. Action—Drop packet, Drop Connection, Reset, Log. Log—Enable or Disable.

–Enable strict validation of header fields—Enables validation of SIP header fields. Action—Drop packet, Drop Connection, Reset, Log.

Log—Enable or Disable.

•Field Masking—Tab that lets you configure the field masking settings for SIP.

–Inspect non-SIP URIs—Enables non-SIP URI inspection in Alert-Info and Call-Info headers. Action—Mask or Log.

Log—Enable or Disable.

–Inspect server’s and endpoint’s software version—Inspects SIP endpoint software version in User-Agent and Server headers.

Action—Mask or Log. Log—Enable or Disable.

•Inspections—Tab that shows you the SIP inspection configuration and lets you add or edit.

–Match Type—Shows the match type, which can be a positive or negative match.

–Criterion—Shows the criterion of the SIP inspection.

–Value—Shows the value to match in the SIP inspection.

–Action—Shows the action if the match condition is met.

–Log—Shows the log state.

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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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