Open ports change. Apps move. Mistakes happen. Monitoring catches the drift.
PortWarden monitors 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. Pricing is on the pricing page. This page is what the plans actually do.
A developer can leave a debug port open after a late deploy. An update can start a new listener. A firewall rule opened for testing never gets rolled back. A remote access tool or Trojan can listen on an unused port, or try to blend in as a common service. When the banner, protocol behavior, or fingerprint does not match what should be there, regular scanning can make that visible.
Start Free Monitoring See PricingWhat we monitor
- Publicly reachable ports on each monitored endpoint
- Service and application fingerprints where available
- 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
Risk is not only what you meant to deploy. It is also what changed without a clean handoff.
Small businesses and small SaaS teams ship fast. That is good for product. It is bad for exposure drift unless something is watching the outside edge.
Deploy leftovers
Temporary admin panels, staging services, debug ports, database consoles, and test apps get left open after a release. Monitoring catches the mistake while it is still only a mistake.
Updates change exposure
Package updates, appliance upgrades, container changes, and new defaults can open ports or publish services nobody planned. Regular scans are a second set of eyes after the change lands.
Shells and Trojans leave signals
Remote access shells, backdoors, and Trojans often listen on unused ports. Some hide on common ports, but the banner or behavior may not match the expected app.
Change detection beats memory
Teams forget what was supposed to be public. History makes new ports, missing services, and changed fingerprints stand out instead of living in assumptions.
Active service inventory
See which apps and services look active on each monitored endpoint. Owners, MSPs, and lean IT teams can keep firewall rules and hardening aligned with reality.
Plain-language next steps
When something changes, you get what was found, why it matters, and what to check next. Basic and Premium include guided analysis so you are not stuck on raw scanner output.
Match the plan to how important the asset is
Start with Free. Move to Basic for recurring alerts and guided analysis. Use Premium on critical endpoints that need deeper recurring coverage.
Free
See what your business exposes before you spend a dollar. Built for basic awareness on a small number of endpoints.
Best for
- Owner-operators testing the service
- Very small environments
- Initial exposure awareness
- 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
For teams that want ongoing visibility without inventing a security ops process from scratch. Attack surface management on a regular cadence.
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
- Scheduled scanning for exposure changes
- All 65,000 ports checked per monitored endpoint
- Alerts for new exposure and findings
- Multi-format reports your team can use
- Historical scan tracking and change context
- Built-in guided analysis for remediation
Premium
For endpoints that matter more. If exposure would create real business pain, you get deeper recurring checks 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 remediation context
- Stronger view of externally reachable risk
- Guided support on top of deeper findings
- Human oversight to help set fix order
A small exposure change can be the first sign of a bigger problem
A new port is not automatically bad. It might be a planned deploy, a vendor update, a support session, or a temporary service. The risk is not knowing it appeared. PortWarden helps you spot the change, compare it to history, and decide whether it needs a quick fix, a deeper scan, or human review.
If a service claims to be HTTPS but returns the wrong certificate, if SSH shows up where it never should, if an unknown admin panel appears, or if a common port runs an unusual banner, the scans help surface that mismatch.
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 stays 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 is wrong
Monitoring tells you what changed. Advanced testing goes deeper.
Regular monitoring is the baseline. When an endpoint needs a closer look, 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