Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Does anyone know of any tool that we could install on a Windows 7 workstation that will simulate Latency? I know you can get software that will throtle the connection but that is not what I am looking for.

What I am after is a simulation of an application having responses from a server come back slowly causing the UI to freeze (which I believe is due to the vendor making network calls on the GUI thread).

share|improve this question

I'm not sure if this site has private messaging, but I have a network bandwidth simulator you drop on two machines. You could basically use the tool and perhaps cutting the network card to 10mbps half duplex to effectively neuter the connection, latency will be pretty awful.

share|improve this answer
Tom, there is no private messaging. But if you give us the name of the simulator that would be great - and help the greater good(tm). – Zypher Nov 26 '10 at 5:12

There's always Nistnet. Developed by the US government. Works on linux. Quite old, but tried and tested, so they say.

Might work under cygwin on Windows 7. Dunno.

A quick google for Network latency simulator brings up this as a possible option. I bet it's not cheap tho:

share|improve this answer
up vote 0 down vote accepted

Looks like MS has a tool that does exactly what I am after but don't officially support it.

Tool is called Network Emulation Windows Toolkit. And someone has uploaded it here: :)

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.