Hi Haiyang,

Thanks for using the forums!

What I am getting from your question is that you are seeing packet loss early in your route (up to your firewall) when you are tracing 5 targets, but when you close all but one target the packet loss goes away. Did I get close to what you are asking?

Either way, it is very tough to tell what may be going on here without being able to see any data. If possible - would you be able to send over some screen shots, and perhaps a .pp2 file (by clicking "File" -> "Export Sample Set..." and then attaching that file to an email)? You can email this to support@pingplotter.com.

If you could do this, we would be more than happy to take a look at the data and let you know what we see happening.

If you should find yourself with any other questions, or needing any other assistance - please don't hesitate to let us know also by emailing us at the email address above.

We look forward to this email.

Cheers! 

-Phillip