in reply to Can I simulate IP-addresses?

Social engineering (in the good way). Invite customers, clients, partners, suppliers, etc. to run your perl script from their various locations and upload the results somewhere central. You'll need a broad sample over a lengthy period of time for better stats.

To do it from a single Internet host is costly, unless you happen to already own a lot of different address blocks or have multiple egress points to the Internet throughout the world.

This is more of a network routing issue than a perl issue IMHO. Never hurts to ask, though.

HTH
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idnopheq
Apply yourself to new problems without preparation, develop confidence in your ability to to meet situations as they arrise.