[arch-general] The principle behind MSN & Yahoo invisible scanners?

Lukáš Jirkovský l.jirkovsky at gmail.com
Sun Aug 29 03:53:38 EDT 2010

On 28 August 2010 19:24, Nilesh Govindarajan <lists at itech7.com> wrote:
>  Go to google.com and search for MSN & Yahoo invisible scanners.
> You'll find a big list.
> So what's the principle of their working?
> I'm thinking of writing a pidgin plugin to catch invisible buddies.

I guess they do some ping-like thing.

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