Never ignore a certificate warning\!

This post is over 5 years old, it may be out of date.

If a program complains about an incorrect certificate of e.g. a website, then never ignore this, but report this to C&CZ a.s.a.p.. The reason to give this warning is a recent complaint of a browser, that pointed to a contaminated laptop, that launched an ARP spoofing attack. The idea behind such an attack is to listen to network traffic in order to e.g. obtain passwords.