Statistical Network Flow Pattern Analysis
Even if a connection is hidden behind someone else's certificate, DPI filters can detect tunnels by the repeating length of control frames and response timings. Using a mismatched TLS profile gives away the use of non-standard software, leading to automatic bandwidth throttling or session drops by the operator.
How to Avoid Heuristic Filtering
- Set the uTLS parameter to Chrome or Firefox for precise browser handshake emulation
- Choose large foreign portals supporting HTTP/2 for SNI camouflage
- Enable mechanisms that add random padding to control packets
- Distribute incoming connections across multiple alternative datacenter addresses