tcpproxy

TCPproxy: Throttle your TCP connections now!

$ npm install -g tcpproxy

The default command will delay each TCP connection one second and redirect port 8080 to 80:

$ tcpproxy -a www.google.com

Finish transfer! -- Time: 150 ms -- Client: 76 bytes -- Server: 18352 bytes
Finish transfer! -- Time: 160 ms -- Client: 76 bytes -- Server: 18310 bytes

You can throttle the connection with many other options, for example with 10 bytes per 100 milliseconds:

$ tcpproxy -a www.google.com --bps 10/100

Other options:

-b, --bindAddress <host>             Local address where the proxy should be bind,
                                     default 127.0.0.1
-l, --bindPort <port>                Local port where the proxy should be bind,
                                     default 8080
-a, --originAddress <host>           Address of the origin server, required
-p, --originPort <port>              Port of the origin server, default 80
-d, --delayConnection <ms>           Delay in millisecond until the connection will
                                     be established to the origin server,
                                     default 1000ms
--bps, --delayBytesPerSecond <b/ms>  Delay bytes per millisecond (bytes/millisecond)
--delayChunkFromClientToOrigin <ms>  Delay chunk from client to origin in millisecond
--delayChunkFromOriginToClient <ms>  Delay chunk from origin to client in millisecond