To contextualize, let’s compare this mystery proxy with established solutions.
| Feature | Reflect4 Proxy (assumed) | Nginx (as reverse proxy) | HAProxy | Squid (forward proxy) |
|----------------|-----------------------------|----------------------------|-------------|------------------------|
| Typical header | Server: made by reflect4 proxy | Server: nginx | No default Server | Server: squid |
| Primary use | Internal reflection/caching | High-performance web serving | Load balancing | Caching forwarding proxy |
| Open source? | Likely proprietary | Yes | Yes | Yes |
| Reflects traffic | Yes (by design) | Yes (via mirror module) | Yes (via http-request mirror) | No |
| Version exposed | "4" (fourth gen) | Version number (e.g., 1.18) | Version seldom exposed | Yes (e.g., 4.15) | made by reflect4 proxy
As seen, reflecting traffic is not unique to reflect4; Nginx’s mirror directive and HAProxy’s traffic mirroring can also do this. However, the explicit branding is rare. To contextualize, let’s compare this mystery proxy with
Penetration testers and security appliances sometimes use reflective proxies to duplicate traffic to a monitoring system. For example, a reflect4 proxy could: The "made by reflect4 proxy" declaration would then
The "made by reflect4 proxy" declaration would then appear only in sandbox responses or test environments, not in production.
Unlike standard proxies that reuse TLS fingerprints, the reflect4 proxy rotates JA3/Signature hashes. It can mimic Chrome, Firefox, or even custom bot fingerprints on every request.