Greg Stark wrote:
Ah! Of course. That makes sense, and listening on 127.0.0.1 never
hurt anyone (except, of course, the tinfoil hat crowd nmapping
localhost in a frenzy...)
Actually on many systems it was very possible to send packets to a machine with a source address of 127.0.0.1 even over external networks or through routers. Making an attack out of this on a TCP service would be difficult, but it has been done.
Good OS distributions install network filters by default to refuse such packets, but lots of OSes still don't do this.
But what we listen to relates to the destination address of the packets, not the source address ...
cheers
andrew
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