TCP Mirror

tcpmirror duplicates TCP traffic received on a port to more than one destination ports. One of the destination is the primary server (port) which responds to the incoming TCP traffic. Other streams are duplicate streams and any response from the respective servers is discarded.

Why

This is helpful in the following scenarios:

• To test a Dev/QA/secondary server with the same requests, traffic and load that the primary production server handles.

• To do performance testing of candidate servers against the existing production server.

• To re-write the server in another language and make sure that the new server responds the same as existing server for same requests.

Install

Download from the releases pages

Download pre-built binary from the release page.

Use go get

If you have golang tools installed, you can download and build the source code locally as follows:

$ go get github.com/codeexpress/tcpmirror

The tcpmirror binary is now available in your $GOPATH/bin directory

Compile from source

$ git clone https://github.com/codeexpress/tcpmirror.git
$ cd tcpmirror; go run tcpmirror.go

Sample use case