HTTP CONNECT Method Deep Dive
Deep dive into HTTP CONNECT for HTTPS tunneling — request format, status codes, timeouts, and debugging tips.
Deep dive into HTTP CONNECT for HTTPS tunneling — request format, status codes, timeouts, and debugging tips.
Request format
CONNECT host:port HTTP/1.1 opens a TCP tunnel. Success is 200 Connection Established before TLS begins.
Error responses
- 407 proxy auth required
- 403 forbidden destination
- 502 bad gateway to origin
Related: 407 auth methods.
Debugging
Capture proxy handshake separately from origin TLS. Timeouts here often mean dead proxy slots.
Related: TLS tunneling guide.
Need proxies at scale?
proxies.st offers health-checked HTTP and SOCKS pools with dashboard access, API keys, and plain-text bulk feeds for pipelines.
Related guides
HTTPS Proxies and TLS Tunneling
How HTTPS works through HTTP proxies via CONNECT, TLS inside tunnels, common SSL errors, and production best practices.
SOCKS4 vs SOCKS5: Key Differences
SOCKS4 vs SOCKS5 compared: authentication, DNS, UDP support, and how to migrate legacy lists to modern clients.