IP Detection Guide
What is public IP detection?
Public IP detection identifies your current egress address and helps determine external reachability.
This tool checks both IPv4 and IPv6, and shows ISP, ASN, region, and timezone details.
Why can IPv4 and IPv6 results differ?
In dual-stack networks, IPv4 and IPv6 may use different routes, so location and latency can differ.
If only IPv4 appears, your network may not have usable IPv6 yet, or policy restrictions may apply.
Common connection types
Based on detection results, your egress type is usually one of the following:
- Home broadband public egress (dynamic IP)
- Carrier shared egress (CGNAT)
- Proxy/VPN/cloud server egress
For NAS remote access, public IPv6 or controllable public IPv4 is typically more stable.
How to tell if IPv6 is supported?
If the IPv6 card shows a valid address, your device currently has IPv6 connectivity.
- Router has IPv6 enabled and prefix assigned
- NIC has IPv6 auto configuration enabled
- DNS supports AAAA resolution
- Firewall allows required IPv6 traffic
You can also open Ipv6 Test Link for a more detailed IPv6 diagnosis.
What is WebRTC leak risk?
Some browsers may expose candidate addresses via WebRTC, even when VPN is enabled.
- STUN may reveal local/public candidate IPs
- Browser fingerprinting increases identifiability
- Restrict WebRTC permissions when needed
For privacy-sensitive use, combine private mode, anti-leak extensions, and strict network policy.
How to troubleshoot NAS/remote access with this?
If external access fails, check in this order:
- Confirm public IP or CGNAT first
- Then verify port forwarding and firewall rules
- Compare IPv4/IPv6 reachability and latency
- Use NAT type results to decide if relay is needed