Military & Defense Web Filtering

Why Military Networks Require Specialized Web Filtering

Military and defense networks face a content risk landscape fundamentally different from commercial environments. State-sponsored advanced persistent content risks (APTs), insider content risk vectors, and the catastrophic consequences of a classified data breach demand web filtering capabilities that go far beyond blocking inappropriate content. Every outbound connection from a DoD network is a potential exfiltration channel, and every inbound link is a potential attack vector.

The Department of Defense operates across multiple network classifications: NIPRNet for unclassified traffic, SIPRNet for secret-level communications, and JWICS for top-secret intelligence. Each network requires distinct filtering policies, but all share the need for comprehensive domain classification. A single miscategorized domain can create a gap in the security perimeter that adversaries actively probe for.

Our database of over 100 million classified domains provides the foundation for web filtering across all DoD network tiers. Updated continuously with content classification feeds and automated classification, the database identifies command-and-control domains, nation-state infrastructure, and social engineering sites within hours of their registration, providing the early warning capability that defense networks require.

DISA STIG & DoD Compliance

Built to meet the most rigorous security standards in government computing

DISA STIG Compliance

Our web filtering data supports DISA Security Technical Implementation Guide requirements for web content filtering. The database covers all STIG-mandated content categories and provides the audit logging and classification classification details required for Assessment and Authorization (A&A) packages.

Zero Trust Architecture

In a zero-trust model, every network request must be verified regardless of origin. Our API integrates with zero-trust brokers and SASE platforms to provide real-time domain reputation scoring as part of the continuous authentication and authorization decision process, enforcing "never trust, always verify" at the web layer.

CMMC Level 3+ Support

Defense contractors handling Controlled Unclassified Information (CUI) must meet Cybersecurity Maturity Model Certification requirements. Our filtering satisfies CMMC practices for DNS filtering, web content restrictions, and malicious site blocking specified in the NIST SP 800-171 controls that underpin CMMC assessments.

NIST 800-53 Controls

Federal information systems must implement NIST 800-53 security controls. Our database directly supports AC-4 (Information Flow Enforcement), SC-7 (Boundary Protection), SC-18 (Mobile Code), and SI-3 (Malicious Code Protection) by providing the domain intelligence needed to enforce these controls at the network boundary.

Layered Defense Architecture

Defense in depth is the foundational principle of military cybersecurity. Web filtering serves as a critical layer in the defense stack, working alongside firewalls, intrusion detection systems, and endpoint protection to create overlapping zones of security. When one layer fails, the others provide continued protection.

Our database integrates at multiple points in the defense architecture. At the network perimeter, it feeds proxy servers and next-generation firewalls with real-time domain classifications. At the endpoint, it powers browser-level filtering for mobile and remote users. At the DNS layer, it enables pre-resolution blocking that prevents connections from ever being established to known-bad domains.

content risk Categories for Defense Networks

59 content categories with enhanced content classification relevant to military operations

unsafe content & C2

Command-and-control servers

restricted content & Spear-restricted content

Targeted credential theft

Espionage Infrastructure

APT staging domains

Foreign Adversary Sites

State-sponsored platforms

Anonymizers & VPNs

data leakage channels

Unauthorized Cloud Storage

Shadow IT, file sharing

Extremist Content

Radicalization, terrorism

Exploit Kits

Zero-day delivery platforms

Suspicious DNS

DGA domains, fast-flux

Newly Registered

Domains under 30 days old

Social Media

OPSEC risk platforms

Personal Webmail

Unmonitored communication

Nation-State content classification

Our content classification pipeline continuously monitors domain registrations, DNS changes, and hosting infrastructure associated with known nation-state content risk groups. When APT29 registers a new restricted content domain or APT41 stands up command-and-control infrastructure, our classification system identifies and categorizes these domains within hours, often before they are used in active campaigns.

Domain Generation Algorithm (DGA) detection identifies algorithmically generated domains used by sophisticated unsafe content families. Fast-flux detection spots domains that rapidly rotate IP addresses to evade blocking. These automated detection capabilities complement traditional content classification feeds to provide comprehensive coverage against the tactics, techniques, and procedures (TTPs) used by advanced adversaries.

All classification decisions include classification details and content risk metadata that integrate with STIX/TAXII content classification platforms, enabling security operations centers to correlate web filtering alerts with broader content risk hunting and incident response workflows.

Defense Sector Use Cases

How military organizations and defense contractors deploy our web filtering database

NIPRNet Boundary Protection

DoD installations integrate our domain classification at NIPRNet boundary proxy servers. Every outbound web request is checked against our 100 million domain database in under 5 milliseconds. Requests to unsafe content, unauthorized cloud storage, and social engineering sites are blocked before they leave the network perimeter, preventing both data leakage and inbound content risk delivery.

Defense Contractor CMMC Compliance

A defense contractor handling CUI across 15 facilities needed to demonstrate CMMC Level 3 web filtering controls for their Assessment and Authorization package. By deploying our API behind their enterprise proxy, they satisfied SC.L2-3.13.6 (network communications monitoring) and SC.L2-3.13.1 (boundary protection) with documented domain classification logs for every web request across all facilities.

Deployed Force Protection

Forward-deployed units with limited bandwidth cannot afford to waste connectivity on non-mission traffic. Our downloadable database runs on local servers without internet connectivity, providing full domain classification in air-gapped environments. Bandwidth-constrained units configure aggressive filtering to prioritize mission-essential web traffic while blocking entertainment, social media, and streaming categories entirely.

Insider content filtering

Web browsing patterns are a key indicator in insider content risk programs. Our category data enables security teams to flag anomalous browsing behavior, such as cleared personnel accessing unauthorized cloud storage, foreign media sites, or anonymization tools. Integration with SIEM platforms creates automated alerts when browsing patterns deviate from established baselines for each user's role and clearance level.

100M

Domains Classified

Content Categories

<5ms

Lookup Latency

24/7

content classification Updates

Deployment Options for Defense Environments

Flexible deployment models for classified, unclassified, and air-gapped networks

On-Premise & Air-Gapped Deployment

Military networks often cannot connect to external cloud services. Our downloadable database deploys entirely within your security boundary. Daily differential updates are delivered via secure transfer mechanisms compatible with cross-domain solutions, ensuring classification data stays current without requiring direct internet connectivity from the classified network.

The on-premise database is delivered as a flat file, SQLite database, or Redis-compatible format that integrates with existing proxy servers, firewalls, and custom security tools. No proprietary software agents or external dependencies are required. The database operates on standard Linux and Windows servers already approved for your network environment.

For connected but restricted networks, our API endpoint can be deployed on FedRAMP-authorized cloud infrastructure or within your own data center. TLS 1.3 mutual authentication ensures that only authorized systems can query the classification service.

Downloadable database for air-gapped networks
Differential daily updates via secure transfer
FedRAMP-compatible cloud API option
STIX/TAXII content classification integration
Syslog and CEF format audit logging

Proxy Integration Example

# Squid proxy ICAP integration
# Check domain against local database

import sqlite3
import sys

db = sqlite3.connect("/opt/wfdb/domains.db")

def check_domain(domain):
    cursor = db.execute(
        "SELECT category, content risk_score FROM domains WHERE domain = ?",
        (domain,)
    )
    row = cursor.fetchone()
    if row:
        category, content risk_score = row
        if content risk_score > 0.7:
            return "BLOCK"
        if category in BLOCKED_CATEGORIES:
            return "BLOCK"
    return "ALLOW"

# Process request from Squid
domain = parse_squid_request(sys.stdin)
print(check_domain(domain))

Case Study: Defense Contractor Network Security

A Tier 1 defense contractor with 25,000 employees across 40 facilities needed to unify web filtering under a single classification source to satisfy CMMC Level 3 audit requirements. Their existing approach used three different filtering vendors across different facilities, creating inconsistent policies and gaps in coverage that auditors flagged as findings.

By deploying our downloadable database to on-premise proxy servers at each facility, they achieved uniform domain classification across all locations within 30 days. The centralized management API enabled their SOC to push policy changes to all 40 facilities simultaneously, and the standardized audit logging format satisfied every web filtering control in their CMMC assessment.

"We went from three inconsistent filtering solutions with audit findings to a unified platform that passed CMMC assessment on the first attempt. The air-gapped deployment option was critical for our classified facilities."
- CISO, Defense Contractor

Military & Defense Web Filtering FAQ

Common questions about web filtering for defense environments

Can the database operate on air-gapped networks?

Yes. Our downloadable database is designed for air-gapped deployment. The full database is delivered as a flat file or SQLite database that runs on standard servers without any internet connectivity. Daily differential updates are small enough (typically under 50MB) to transfer via approved cross-domain solutions or removable media, keeping the database current even in fully disconnected environments.

Does this meet DISA STIG requirements for web filtering?

Our database supports the content filtering requirements specified in DISA STIGs for web proxy servers and boundary protection devices. We provide classification across all STIG-mandated categories, generate audit logs in the required format, and include classification classification details. We can provide documentation packages formatted for inclusion in your A&A submission.

How quickly are new content risk domains classified?

Our automated content classification pipeline classifies newly registered domains within 4 to 6 hours. Domains associated with known content risk actor infrastructure, DGA patterns, or hosting on suspicious autonomous systems are flagged immediately. Critical content risk indicators from government and industry content classification sharing programs are processed within 1 hour of receipt.

What format is the downloadable database delivered in?

The database is available in multiple formats: SQLite for direct query integration, CSV/TSV for import into existing tools, Redis RDB for high-performance lookups, and a custom binary format optimized for minimal memory footprint. All formats include the domain, primary category, secondary categories, category score, first-seen date, and last-classification date.

Can different network enclaves have different policies?

Absolutely. The database provides raw classification data, and your local filtering infrastructure applies policies based on the classification. NIPRNet boundary proxies might block social media and streaming while allowing news and reference sites. Lab networks might have more permissive policies for research. Each enclave's proxy server applies its own policy rules against the same domain classification data.

Do you support integration with SIEM and SOAR platforms?

Yes. Our classification data integrates with Splunk, Elastic, QRadar, and other SIEM platforms via syslog, CEF, and STIX/TAXII formats. Security analysts can enrich web proxy logs with domain categories and category scores, enabling correlation rules that detect anomalous browsing patterns, potential insider content risks, and compromised endpoints communicating with C2 infrastructure.