ping questions

robert robert at
Tue Dec 22 08:39:20 UTC 2015

Hi there,

At work I have an internet connection with a static IP. A Zyxel isdn 
modem is connected to it.
Trying to ping that IP from outside fails (100% loss).

When I am logged in a pc in a private network behind the modem, I can 
ping the that same IP without loss.

Why is that so?

thanks for your info

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