CUI

The CUI target sends obfuscating packets upon incoming SYN to make the connection invisible to third-party intrusion detection.

UDPENCAP

Unconditionally and statelessly encapsulate transport layer packets in UDP packets and decapsulate UDP packets.

--decap protocol

Decapsulate to this protocol (number).

--sport port

Encapsulate with the source port (number).

--dport port

Encapsulate with the destination port (number).

ZHANG

The ZHANG target sends obfuscating packets upon incoming SYN/ACK to make the connection invisible to third-party intrusion detection.

gfw

The gfw match allows to match on gfw packet fingerprints.