Application Filtering

Control What Apps Actually Run on Your Network

The industry's most powerful Deep Packet Inspection engine. Real-time Layer-7 classification of network application traffic with 5000+ application signatures — identifying applications even when they hide inside SSL or standard ports.

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GajShield Application Filtering
5000+
Application Signatures
2,500+
Applications Controlled
Layer-7
Real-Time DPI Engine
The Application-Layer Threat

Last-Generation Firewalls Are Blind to Modern Apps

Bandwidth demand is increasing. Web 2.0 architectures changed how protocols are used and data is transferred. Most communication now goes through standard protocols like HTTP and HTTPS — which means traditional firewalls relying on port-based filtering can no longer provide enterprise security.

Many applications use standard ports like 443 to camouflage their traffic. Some, like BitTorrent, can run on any port and hide inside SSL. The strength of a firewall in classifying these applications forms the basis of your network security.

A Concrete Example: Torrents on Your Network

Three Risks of Letting Risky Apps Run Free

While some applications are useful for business, others — like torrents and proxy applications — carry serious consequences if allowed.

Risk 1 · Malware

Common Source of Infection

Torrents are common sources of malware and viruses — especially software and games that must be installed and executed. Could lead to network infection and data leak risk through downloaded applications.

Risk 2 · Legal Liability

Copyright Infringement

If employees torrent illegally on the corporate network — knowingly or not — the organisation could face copyright infringement claims and associated legal liability.

Risk 3 · ISP Action

Throttling, Fines, Suspension

ISPs working with copyright holders monitor traffic. If they catch a customer torrenting, they may resort to bandwidth throttling, fines, or even account suspension — causing business disruption.

How GajShield Solves It

Deeper Than Layer 7

GajShield's Application Filter is the industry's most powerful Deep Packet Inspection engine, providing real-time Layer-7 classification of all network application traffic — including DNS, FTP, HTTP, HTTPS, ICMP, MGCP, NetBIOS Name Service, SMTP, and TFTP — with 5000+ application signatures.

Smart classification examines the data part (and where needed, the header) of every packet at the Application Layer of the OSI model — searching for protocol non-compliance, viruses, spam, intrusions, or defined criteria. This is computer network packet filtering working at depths most NGFWs don't reach.

Beyond Layer-7, the Data Security Firewall offers application and data context visibility — preventing data leakage and sophisticated application-layer threats including malware, phishing, and botnets. Real-time logs and reports let security teams adjust network settings on the fly for maximum security and productivity.

Identify

Detect 2,500+ applications regardless of port, protocol, or SSL camouflage.

Classify

Sub-classify within categories — allow business apps, block personal accounts of the same service.

Control

Allow, block, or rate-limit per user, group, IP, network — with full audit trail.

SSL & Encrypted Apps

Detect Apps Hiding Inside SSL

Modern applications increasingly hide inside SSL or use standard ports like 443 to camouflage their traffic. Port-based filtering can't see them. Identifying applications from SSL protocols and then filtering them is one of the hardest problems in modern firewalling.

BitTorrent is a prime example — it can run on any port and wrap inside SSL, making it nearly impossible for traditional firewalls to detect. GajShield's protocol decoding with context-based deep packet inspection blocks traffic based on its actual type, not its port.

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443
The Port Where Apps Hide

"Port 443 is the new wild west. Nearly every modern application disguises itself behind SSL on standard ports. If your firewall only sees port numbers, you're flying blind."

Capabilities

What You Can Configure & Control

Every Application Filtering capability available in the GajShield platform — organised into four functional groups.

VISIBILITY & CONTROL

Application & Data Layer Control

  • Control and visibility at data layer — deeper than Layer 7
  • Achieve visibility across 2,500+ applications
  • 5000+ application signatures supported
  • Inbuilt application categories with sub-classification
  • Provides risk factor and risk level for applications
POLICY & ENFORCEMENT

Granular Policy Control

  • Identify, allow, block, or limit (usage control) by TCP/IP application
  • Detect and block known applications like P2P, IM
  • Policy-based shaping by user, group, IP address, network
  • Support BYOD — block based on traffic from mobile devices
  • Object-oriented policy management for quick setup
PERFORMANCE & ECONOMICS

Bandwidth & Cost Optimisation

  • Enhance business-critical app performance — limit bandwidth for non-business traffic
  • Saves bandwidth and reduces infrastructure costs
  • Filter out non-business traffic to curb personal usage
  • Detailed reports showing which users access which applications
SECURITY & PROTECTION

Threat Mitigation

  • Block threats emerging from risky applications
  • Protect corporate users including BYOD devices
  • Protocol decoding with deep packet inspection
  • Context-based DPI to detect SSL-wrapped applications
Get Started

See What's Actually Running on Your Network

Talk to a GajShield expert. We will demonstrate Application Filtering on live traffic from your own network — you see exactly which applications are running, on which ports, by which users. Most customers are surprised by what they find.

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