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Firewall & Network ProtectionUnique

Real-time network guard, protecting your phone from within.

A built-in device guard that monitors every internet connection your phone makes. It automatically blocks rogue scam servers, stops suspicious background app traffic, protects against online intruders, and keeps your private data from leaking onto public Wi-Fi networks.

Monitor-onlyStrict ShieldComplete Lockdown
How it worksSee plans
5
Smart block actions
3
Protection levels
On-device
Traffic filtering
Fail-safe
Connection safeguards
Process

How it protects you. From threat detection to clear action.

01Presets

Ready-to-use protection profiles

Choose from simple, tested security presets designed for daily home use, travel, or high-security mode. All settings are verified in advance so you never lose connection to trusted websites or everyday services.

02Enforcing

Stops harmful traffic instantly

Monitors outgoing and incoming connections, immediately stopping apps from reaching known fraudulent servers or transmitting unapproved personal data in the background.

03Clarity

Clear records of blocked threats

See exactly what was blocked in real time: suspicious servers prevented from contacting your phone, blocked data trackers, and protected home Wi-Fi connections.

Protection Details

What this protection provides.

Every protection check runs directly on your device to keep your digital life secure, private, and fast.

How protection works
  1. 01

    App & Server Blocking

    Block suspicious internet addresses or cut off individual apps from using internet data without having to uninstall them.

  2. 02

    Vulnerable Connection Shield

    Automatically closes off insecure connection channels commonly targeted by automated internet scanners and hackers.

  3. 03

    Reliable Connection Safeguards

    Built-in fail-safes guarantee that your web browsing and normal apps continue working seamlessly without accidental lockouts.

  4. 04

    Intrusion Detection

    Detects and deflects unauthorized probing attempts, malicious scripts, and background tampering on your connection.

  5. 05

    Regional Threat Shield

    Block or receive alerts about traffic originating from high-risk international regions known for heavy scam activity.

  6. 06

    Overload Protection

    Shields your connection from sudden flood attacks and spam bursts, maintaining smooth device performance.

  7. 07

    Automatic Threat Database Sync

    Continuously updates your block lists from our global scam database so emerging online threats are neutralized immediately.

  8. 08

    Always-On Device Protection

    Runs silently in the background with minimal battery usage, keeping your phone safe whether you are on mobile data or Wi-Fi.

  9. 09

    File Safety Guard

    Integrates file safety verification alongside internet traffic inspection to intercept dangerous downloads before they open.

Why it matters

Real protection you can see working. Not a confusing technical settings screen.

  • Every rule is tested beforehand so your connection to trusted websites and banking apps remains uninterrupted.
  • Reserved safe connection safeguards prevent you from ever getting accidentally locked out of the internet.
  • Clear blocked-connection history lets you see exactly which trackers and scam servers were stopped.
  • Monitor-only, Strict Shield, and Complete Lockdown modes let you choose the right balance of protection.
Live instrument

The network guard in action.

The panel below mirrors your phone's live shield: see connections evaluated in real time, suspicious servers stopped, and your safe connection preserved.

Network Guard · Active ProtectionActive · Blocking threats
1.42 MConnections checked
38,904Threats blocked
612 MBProtected traffic
9,431Websites screened
Blocked dangerous connections across the globeYour connection is secure
ActionTargetApp
BlockHostile command serverSuspicious utility
BlockKnown phishing networkAll apps
FilterEncrypted DNS resolverSystem security
AlertUnverified banking proxyBanking app
AllowHome Wi-Fi devicesTrusted devices
Blocked threat history · Real-time
Hostile foreign server Blocked
Unauthorized remote access Blocked
Suspicious background probe Blocked
Unencrypted tracking server Blocked
Known fraud network IP Blocked
38,904 scam & tracking requests blockedIllustrative preview · Zdefence
Everyday Safety

Real protection for everyday life. Designed for situations you encounter daily.

01
USE·CASE·01
STATUSDEFENDED

Block scam servers

Prevent rogue apps from contacting known scam networks or data harvesting servers.

SEE THE PLAN
02
USE·CASE·02
STATUSDEFENDED

Stop background snooping

Close off insecure connection ports commonly targeted by automated network scanners.

SEE THE PLAN
03
HOST·SCOPEIPV4
IP·RADARSCANNED

Cut off suspicious apps

Instantly cut an app's internet access while keeping it installed for safety review.

SEE THE PLAN
04
USE·CASE·04
STATUSDEFENDED

Defend against connection floods

Keep your phone responsive even during heavy spam bursts or connection overloads.

SEE THE PLAN
05
USE·CASE·05
STATUSDEFENDED

Stop malicious website code

Intercept dangerous injection scripts and tampering attempts on the fly.

SEE THE PLAN
06
USE·CASE·06
STATUSDEFENDED

Verify what was blocked

See clear summaries of blocked connections, saved data, and neutralized risks.

SEE THE PLAN
Plans & Pricing

Planned capabilities

Network protection capability across plans, with easy-to-use controls on all tiers.

Compare all plans
Monitor-only modeObserve and log network connections without actively blocking.Disclose soon
Strict & Lockdown modesActive protection that automatically closes vulnerable ports and drops risky connections.Disclose soon
Protection presetsReady-to-use profiles for home, public Wi-Fi, and high-security needs.Disclose soon
Intrusion detectionAutomatic detection of malicious code patterns and probing attempts.Disclose soon
Regional threat shieldBlock connections from countries known for widespread cyber fraud.Disclose soon
Overload protectionKeeps your connection stable during sudden spam bursts and flood attempts.Disclose soon
All capabilities run directly on your phone with zero hidden requirements.Tier feature distribution announced at launch
FAQ

Questions about firewall & network protection.

Ask us directly
How does the firewall protect my phone?

It acts as a smart filter right on your phone. Every connection an app attempts is checked against safety rules, automatically stopping scam servers and data leaks without slowing down your internet.

Can the firewall accidentally block my internet?

No. Essential connection channels and website directory services are specially guarded so you never lose access to normal websites, banking services, or email.

What is the difference between Strict Shield and Complete Lockdown?

Strict Shield blocks known scam servers and shuts off vulnerable ports for daily use. Complete Lockdown is designed for hostile environments like unsecured public Wi-Fi, applying the strictest filtering possible.

Where do block lists come from?

Safety lists update automatically from our global threat intelligence database, refreshing regularly so newly discovered scam servers are blocked immediately.

Further reading
GuideChoosing between Monitor, Strict, and Lockdown protection5 min
BriefHow network guards prevent background phone leaks6 min
ReportCommon mobile network attacks and how they are blocked7 min
Keep exploring

More ways Zdefence protects you.

All features
Unique

VPN / Private Connection

True privacy and IP masking. Encrypted browsing without data leaks.

Unique

Anti-Phishing Link Inspection

Every link verified safe. Before you tap or enter passwords.

Unique

Threat Intelligence & Scam Database

Live global scam alerts. Updated continuously around the clock.

Get started

Put firewall & network protection to work on your device.

Start free with essential protection — every scan module runs from day one. Defence 90°, 180°, and 360° provide complete peace of mind.

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