Indigo Software-Defined Firewall

Carrier-grade protection plus granular visibility and control

Flexible, carrier‑grade security for communications service providers

When it comes to monitoring and securing communications services, SoC teams need solutions that meet their unique challenges. Designed specifically for the needs of CSPs, the Indigo Software‑Defined Firewall (SDF) delivers carrier‑grade performance and availability. It is currently in‑line at large‑scale deployments such as monitoring and controlling traffic at national telecom companies or powering the entire Internet infrastructure of a country.

The Indigo Software‑Defined Firewall (SDF) is a multi‑vendor solution designed specifically for network operator Security Teams that need a customized, personalized Firewall / DPI solution to address today’s complex security and compliance concerns. It combines next‑generation firewall features with a software‑defined architecture to simplify complex security management. The industry’s highest‑performing DPI engine provides near‑real‑time visibility into network traffic.

Plus, it gives mobile, fixed telecom, satellite data and ISP SOC teams the flexibility to establish policies for controlling applications and user access to URLs using a modern scripting language. An Elastic Stack integration, which includes the Kibana dashboard, further simplifies management and speeds incident response time


The Indigo Advantage

  1. Secure and control messaging, VoIP and other applications over mobile, fixed telecom, satellite and public IP networks
  2. Control prohibited traffic without hindering access to key communications and Internet services
  3. Achieve full visibility into network traffic at line speed – state‑of‑the‑art DPI engine
  4. Increases network operator revenue by minimizing false positives
  5. Regular application and protocol updates eliminate need to for custom development and maintenance
  6. Fast and easy to deploy

Next‑Generation Firewall for Large‑scale Networks

With the growth of IP‑enabled communications, encrypted applications and user demands unfettered access to key services, network operators face enormous compliance challenges. They must also provide carrier‑class reliability, which is vulnerable to DDoS attacks, application layer intrusions, APTs and malware, and other threats. At the same time, they most assure the availability of customers’ hosted services and protect their data.

The Indigo SDF provides integrated next‑generation security along with centralized management. WAF capabilities also defend against SQL injection and other application layer attacks, while anti‑DDoS protects the availability of not only your network infrastructure but also your customers’ hosted services.

Network security monitoring
Web application protection
DDoS protection
Historic and real‑time threat reporting
Data leakage protection
Intrusion detection system
Intrusion prevention system

Regain Control of Activity and Access

The Indigo SDF restores visibility into network traffic made opaque by encrypted applications and obfuscated or masked traffic path techniques such as domain fronting. It can also granularly control what applications are permitted, prioritized or de‑prioritized for access. An advanced scripting engine allows SOC teams to flexibly and dynamically implement policies. These policies can control subscriber activity such as use of VoIP and encrypted messaging apps or access to prohibited or malicious URLs.

The SDF enforces network access controls and regulates IP‑based communications network traffic with integrated awareness of applications. This includes subscriber local IP‑address visibility, which enables the implementation of subscriber‑specific rules and also improves the detection of certain applications.

Scripting Engine
Indigo SDF policies are written as scripts based on the Lua programming language and provide the following features:

Flexibility: Policy rules, lists and objects can be integrated with external systems (RADIUS, SQL, HTTP, etc.) and data feeds (IP reputation database and malware hash lists); data can be arbitrarily processed (JSON, XML, CSV, etc.).

Just‑in‑time compiler: Scripts are compiled to native x86 machine code for optimal performance.

Dynamic reload: Scripts can be reloaded live in production without restarting the firewall, and all state information is retained.

Sandbox: Scripts are memory‑safe and sandboxed; errors in scripts cannot crash the main firewall processes.


Quickly and Cost‑Effectively Comply with Regulations 

The Indigo SDF is specifically designed to streamline compliance. It enables CSPs to quickly and cost‑effectively comply with government mandates such as monitoring and controlling apps and access to harmful websites or blocking IP telephony (VoIP). Capabilities include:

  • Data Retention
  • Governing access to  websites / URLs
  • Governing applications traffic — including encrypted messaging
  • Blocking  protocols / proxies / VPNs

Gain Real‑time Visibility with Highest‑Performing DPI Engine

The Indigo SDF integrates the R&S® PACE 2 DPI engine from the German cybersecurity leader Rohde & Schwarz epoque. With throughput of up 32 Gbps per core, it is the the highest performing DPI engine available today. The R&S PACE 2 also provides state‑of‑the‑art IP traffic analytics capabilities, including behavior analysis. The DPI solution also performs Protocol Decoding (open protocols like HTTP, DNS, e‑Mail, FTP, etc.).


Network Management

Raise your network’s quality and streamline your business practices with sophisticated traffic management for telecom, Wi‑Fi and broadband networks. Capabilities include:

Captive portals NetFlow probe Traffic analysis Shaping and optimization Charging and billing


Carrier‑Grade Performance and Availability

The Indigo SDF is designed from the ground up as a carrier‑grade security technology.

  • <0.1 ms
  • 10G
  • 14.8M
High Availability
  • Bypass mode – prevents network outages in case of power or hardware failure
  • Hot standby – Automatic failover time of one second
Low Latency
  • Zero‑copy packet processing and forwarding architecture – bypasses host kernel to achieve minimal latency and maximum throughput
  • One‑pass architecture
  • < 0.1 ms 
Wire‑speed Throughput 
  • 10G wire‑speed
  • 14.8M packets per second

Operation Modes

The Indigo SDF is typically installed between the BRAS and NAT elements in the network, and can be configured to run in three modes: 

Inline mode

Acts as transparent network bridge between two ports. This is the recommended mode.

Monitor mode

Acts as network analyzer on mirror (SPAN) port.

Passive mode

Analyzes network traffic on mirror (SPAN) port and injects packets (TCP reset, DNS response, HTTP redirect, and ICMP unreachable) on the side.