Root permissions are required in order to successfully use the ICMP protocol, hence most firewalls will block all ICMP packets. I'd suggest the first step is, if at all possible, to establish just what protocols are allowed thro' your firewall(s) ... it may be that e.g. telnet _is_ allowed, in which case, you could use Net::Telnet in order to detect a login string.

You don't say which OS you're using, but in my (admittedly limited) experience, on a multiple interface system, the interface is selected by virtue of the address, hence (starts to cringe) you might be able to utilise modifications to the packet routing on your m/c in order to 'select' a WAN interface.

BTW, it frequently helps readability to use <p> tags to split your posting...

A user level that continues to overstate my experience :-))

In reply to Re: Net::Ping not working right by Bloodnok
in thread Net::Ping not working right by aweber1nj

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