udp-proxy
UDP-Proxy for node.js. Supports both IPv6 and v4 (and proxies between them)
port-proxy
Listens to the specified port and forwards to the specified port.(监听指定的端口,并转发到指定端口。)
coap
A CoAP library for node modelled after 'http'
netcat
Netcat client and server modules written in pure Javascript for Node.js