There is a simple and free WAN simulator that Tara consulting have open sourced. This is how to use it for a quick and dirty 300ms delay simulation (in my case simulating India to the UK).
Software home page: http://wanem.sourceforge.net/
Link to download the virtual appliance: http://wanem.sourceforge.net/vma-server.html (or look for the v2.3 ISO)
The setup guide: http://downloads.sourceforge.net/project/wanem/Documents/WANemv11-Setup-Guide.pdf
Windows route change:
route add DestinationIPaddress mask 255.255.255.255 WanEmIPAddress
Linux route change:
route add –host DestinationIPaddress netmask 0.0.0.0 gw WanEmIPAddress
Ping the DestinationIPaddress and the response should be higher then the latency that you have configured.
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