I tend to use Net::Ping for this sort of thing. The CPAN Testers results say it's highly portable. Of course, you have to choose your ping protocol, and Net::Ping does not support absolutely everything. I tend to use icmp, which requires privilege, at least under a non-Windows system.

In reply to Re: writing a utility to determine whether I have a working wifi connection by Anonymous Monk
in thread writing a utility to determine whether I have a working wifi connection by Aldebaran

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