Port 8080: HTTP Alternate & Proxy Inspection Vectors

Handshake Signatures

TCP Port 8080 is historically registered as HTTP Alternate. When an encrypted TLS Client Hello is transmitted over port 8080, standard DPI sniffers automatically cross-reference the Application-Layer Protocol Negotiation (ALPN) extension against standard HTTP/1.1 and h2 profiles.

Proxy Header Leaks

If the target endpoint sits behind a poorly configured reverse proxy, the intermediate node frequently injects client-revealing metadata into the raw stream:

// Downstream leaked proxy headers
X-Forwarded-For: 203.0.113.195
X-Real-IP: 203.0.113.195

Diagnostic tools must verify that upstream gateways drop these headers prior to edge routing.