DEV Community: myip casa

Detect VPN, Proxy and Tor Users in Your Backend

myip casa — Tue, 10 Mar 2026 19:34:19 +0000

Detect VPN, Proxy and Tor Users in Your Backend

Many developers search for a reliable VPN detection API or IP geolocation API.

Example: Detect VPN users

curl -H "X-API-Key: YOUR_API_KEY" \
https://myip.casa/api/pro/security

Whether you are building a SaaS platform, marketplace, or developer tool, identifying anonymized traffic can help prevent:

bot activity
account abuse
scraping
fraud attempts

One common signal used in backend systems is IP intelligence.

In this article we’ll look at how developers can quickly detect VPN, proxy, Tor, and datacenter connections using a simple API.

Client Request
↓
Backend Server
↓
MyIP.casa API
↓
VPN / Proxy / Tor Detection

Step 1 — Retrieve the public IP

The first step is simply detecting the client’s public IP address.

Example request:

curl https://myip.casa/api/ip

Example response:

{
  "ip": "198.51.100.42"
}

This endpoint works without authentication and is useful for debugging or basic integrations.

Step 2 — Detect VPN, Proxy and Tor users

To analyze the network origin of a request, you can use the security endpoint.

Example:

curl -H "X-API-Key: YOUR_API_KEY" \
https://myip.casa/api/pro/security

Example response:

{
  "ip": "203.0.113.25",
  "network": {
    "asn_org": "US Broadband Inc.",
    "connection_type": "residential"
  },
  "security": {
    "is_datacenter": false,
    "is_proxy": false,
    "is_tor": false,
    "is_vpn": false,
    "risk_level": "Low",
    "risk_score": 0
  }
}

With this data, your backend can easily apply rules such as:

blocking Tor exit nodes
limiting datacenter traffic
requiring verification for VPN users

Step 3 — Retrieve full IP intelligence

For deeper analysis, you can retrieve a full IP profile including geolocation, ASN data, and threat signals.

Example request:

curl -H "X-API-Key: YOUR_API_KEY" \
https://myip.casa/api/pro/details

The response includes:

city and country
ASN and network organization
connection type (residential, hosting, etc.)
VPN and proxy detection
security risk score

These signals are commonly used in fraud detection pipelines and traffic analysis systems.

Bulk IP analysis

If you need to analyze multiple IP addresses (for example from logs), you can use the bulk endpoint.

POST /api/pro/bulk

Example request:

curl -X POST https://myip.casa/api/pro/bulk \
-H "Content-Type: application/json" \
-H "X-API-Key: YOUR_API_KEY" \
-d '{"ips":["198.51.100.10","198.51.100.42"]}'

This allows security teams to analyze up to 50 IPs per request.

Getting started

You can explore the full developer documentation here:

https://myip.casa/developer/

To access the private endpoints and security signals, generate an API key:

https://myip.casa/subscribe

Final thoughts

Understanding where requests originate from has become an important signal for modern backend systems.

Whether you want to detect VPN users, identify datacenter traffic, or enrich logs with geolocation data, IP intelligence APIs make it easy to integrate these signals into your applications.

If you're experimenting with IP intelligence, you can start testing the API instantly using the public endpoint.

How to Quickly Diagnose Network Issues Using Browser-Based Tools

myip casa — Sat, 27 Dec 2025 15:13:45 +0000

When something goes wrong with your internet connection, diagnosing the issue can be surprisingly difficult.
Is it your ISP? Your DNS? A VPN misconfiguration? A blocked port? A certificate problem?

Most of the time, you don’t need heavy desktop software or complex CLI commands. A few well-designed browser-based tools can already give you clear answers.

In this article, I’ll walk through the most common network checks you may need and how to run them quickly from your browser.

1. Checking Your Public IP Address

The first step in many troubleshooting scenarios is knowing which IP address the internet sees.

This is especially useful if you:

Use a VPN or proxy
Host services from home
Debug firewall or routing issues
Want to verify IPv4 vs IPv6 connectivity

A good IP checker should show:

Your public IP
IP version (IPv4 / IPv6)
Approximate geolocation
ASN / ISP information

This immediately tells you whether your traffic is routed as expected.

2. Testing Open and Blocked Ports

If a service is unreachable, the problem is often a closed or filtered port.

Typical cases:

A game server not accessible from outside
A self-hosted service behind NAT
Firewall or router misconfiguration

A browser-based port checker lets you quickly verify whether a port is reachable without touching your server configuration.
It’s a simple way to confirm whether the issue is local or network-related.

3. Detecting DNS Leaks (Especially with VPNs)

Using a VPN does not automatically guarantee DNS privacy.

If your DNS requests bypass the tunnel, your ISP may still see:

The domains you access
Your approximate location

A DNS leak test shows:

Which DNS resolvers are actually used
Whether they belong to your ISP, VPN provider, or a third party

This check is essential for VPN users and privacy-conscious setups.

4. Understanding Network Paths with Traceroute

When latency is high or connections fail intermittently, traceroute helps identify where the problem occurs.

It reveals:

Each network hop between you and the destination
Latency at every step
Routing changes or congestion points

A browser-based traceroute is useful when:

You can’t install tools
You’re debugging from a restricted environment
You want a quick overview without CLI output parsing

5. Testing Latency and Connection Quality

Speed alone doesn’t tell the whole story.

Latency, jitter, and packet stability are critical for:

Gaming
VoIP
Video calls
Remote work

A lightweight latency test gives immediate insight into connection quality beyond raw bandwidth.

6. Checking SSL/TLS Certificates

SSL issues are a frequent source of errors:

Expired certificates
Invalid chains
Wrong hostnames

An online SSL checker lets you:

Inspect certificate validity
Check expiration dates
Verify TLS configuration

This is especially useful for quick production checks or during certificate renewals.

Why Browser-Based Tools Matter

Browser-based diagnostics have a few major advantages:

No installation
No admin privileges required
Cross-platform
Easy to share and reproduce results

That’s why I built myIP.casa, a small collection of fast, ad-free network diagnostic tools that run entirely in the browser.

👉 https://myip.casa

The goal is not to replace advanced tools, but to make common network checks accessible, quick, and readable.

Final Thoughts

Network issues often feel complex, but many can be identified in minutes with the right checks:

IP visibility
Port reachability
DNS behavior
Routing paths
Latency
SSL configuration

Having simple tools available can save a lot of time, whether you’re debugging a server, testing a VPN, or just trying to understand how your connection behaves.

If you have suggestions, missing checks, or feedback, feel free to share, improving clarity and usefulness is always the priority.