Simulating network latency for localhost connection on Windows 7

Question

I need to simulate network latency to a program running on the local computer, connecting to a local service. Thus far I have tried dummynet (a windows build of ipfw) which I got working after some trial and error. While it generally works, I can't seem to get it to filter localhost traffic. Even after adding a rule from any to any which affects external traffic, this makes no difference for local connections. I would appreciate if anyone knows how to simulate local latency using dummynet or a different tool. The tool should be able to simulate latency generically in IP packets, (TCP and UDP) and not be protocol specific.

score 6 · Answer 1 · answered Jun 04 '14 at 14:05

6

On windows 7 you should take at Clumsy:

clumsy makes your network condition on Windows significantly worse, but in a managed and interactive manner.

clumsy demo

answered Jun 04 '14 at 14:05

magnetik

269

score 2 · Answer 2 · answered Oct 17 '13 at 15:48

2

If you're just testing HTTP traffic the Fiddler Web Debugger is pretty easy to use. You just select the stream, flip to the AutoResponder tab, select "Add Rule", then right click on the rule and select "Set Latency".

answered Oct 17 '13 at 15:48

heavyd

65,321

Simulating network latency for localhost connection on Windows 7

2 Answers2