Open ports change. Applications move. Mistakes happen. Monitoring is how you catch the drift.
PortWarden monitors your authorized domains and public IPs so you can see what is reachable from the internet, what changed since the last check, and what needs attention first. The pricing page shows the basics. This page explains what the monitoring plans actually do for your team.
A developer can expose a debug port during a late-night deployment. A software update can enable a new listener. A firewall rule can be changed for testing and never rolled back. A remote access tool or Trojan can create a shell on an otherwise unused port, or try to blend in by pretending to be a common service. When the exposed banner, protocol behavior, or service fingerprint does not match what should be there, regular scanning can make the problem visible.
Start Free Monitoring See PricingWhat we monitor
- Publicly reachable ports across each monitored endpoint
- Service and application fingerprints where available
- Unexpected new exposure and configuration drift
- Suspicious service changes, banners, and protocol mismatches
- Historical scan results so you can see what changed
- Findings and guidance your team can act on
The risk is not only what you deployed on purpose. It is also what changed without a clean handoff.
Small businesses and small SaaS teams move fast. That is good for shipping. It is bad for exposure drift unless something is watching the outside edge of the network.
Developer and deployment mistakes
Temporary admin panels, staging services, debug ports, database consoles, and test applications can be left open after a deployment. Monitoring helps catch the mistake while it is still only a mistake.
Software updates can change exposure
Package updates, appliance upgrades, container changes, and new default settings can open ports or publish services your team did not expect. Regular scans give you a second set of eyes after the change lands.
Remote shells and Trojans leave signals
Threat actors often use remote access shells, backdoors, or Trojans that listen on otherwise unused ports. Some try to hide behind common ports, but the banner or service behavior may not match the expected application.
Change detection beats memory
Teams forget what was supposed to be exposed. PortWarden keeps historical scan context, so new ports, missing services, and changed fingerprints stand out instead of getting buried in assumptions.
Active service inventory
Know which applications and services appear active across each monitored endpoint. That visibility helps owners, MSPs, and lean IT teams keep firewall rules and hardening work aligned with reality.
Plain-language remediation
When something changes, PortWarden helps explain what was found, why it matters, and what to check next. Basic and Premium include guided analysis so your team is not left staring at raw scanner output.
Choose the monitoring level that matches the importance of the asset
Every plan is designed to give small teams practical external visibility. Start with Free, move to Basic when you want recurring alerts and guided analysis, and use Premium for critical endpoints that need deeper recurring coverage.
Free
Start by seeing what your business exposes before you spend a dollar. Free is built for basic awareness and quick validation of a small number of endpoints.
Best for
- Owner-operators testing the service
- Very small environments
- Initial exposure awareness
- Checking up to 3 endpoints
What you get
- Basic port monitoring
- Visibility into externally exposed ports
- All 65,000 ports checked per monitored endpoint
- Light recurring checks for change awareness
- Simple summary reporting
Basic
Basic is for teams that want ongoing visibility without building a security operations process from scratch. It turns exposure monitoring into a regular business control.
Best for
- Small businesses with public IPs or domains
- Small SaaS teams with production assets
- MSPs tracking client exposure
- Teams that need alerts and history
What you get
- Regularly scheduled scanning for exposure changes
- All 65,000 ports checked per monitored endpoint
- Alerts for fresh exposure and new findings
- Multi-format reports your team can use
- Historical scan tracking and change context
- Built-in guided analysis for remediation support
Premium
Premium is for endpoints that matter more. If an exposed asset would create real business pain, this plan gives you deeper recurring visibility and stronger remediation context.
Best for
- Critical production endpoints
- Customer-facing SaaS applications
- Higher-risk infrastructure
- Teams that need deeper recurring analysis
What you get
- Everything in Basic
- Deeper recurring vulnerability analysis
- Richer finding detail and stronger remediation context
- More complete visibility into externally reachable risk
- Guided support on top of deeper findings
- Faster path to hardening decisions
Small exposure changes can be the first visible sign of a bigger problem
A new port is not automatically bad. It could be a planned deployment, a vendor update, a support session, or a temporary service. The risk is not knowing that it appeared. PortWarden helps you identify the change, compare it to historical context, and decide whether it needs a quick fix, deeper scanning, or human review.
If a service claims to be HTTPS but returns the wrong certificate, if SSH appears where it was never expected, if an unknown admin panel shows up, or if a common port is running an unusual banner, our scans help bring that mismatch to the surface.
Common scenarios we help catch
- A developer exposes a debug or staging service during a release
- A firewall or cloud security group allows more than intended
- A software update enables a new listener by default
- A remote support tool remains open after troubleshooting
- A backdoor, Trojan, or remote shell listens on an unexpected port
- A service tries to look normal, but the banner or protocol behavior is wrong
Monitoring tells you what changed. Advanced testing helps you go deeper.
Regular monitoring is the baseline. When an endpoint needs a closer look, you can run on-demand scanners for service enumeration, TLS review, OpenVAS, OWASP ZAP, web discovery, SQL injection validation, XSS validation, and controlled no-harm exploit validation.
Browse Scanners Advanced Testing