--- Pascal <[EMAIL PROTECTED]> wrote:
> The goal of the hashing was to address the problem
> of keeping the list
> of IPs out of the hands of spammers. I have looked
> into obtaining an IP
> listing from existing RBLs and that seems to be
> their biggest concern.
> Some even make you sign paperwork to that effect. I
> left the phrasing
> generic ("one-way hashing function") because that is
> an area in which I
> am weak and was hoping to receive feedback on. Is
> there no function
> computationally intensive enough to use in this
> application?
>
> -Pascal
I understand why you'd want to hash the IP's, but the
objection is that there aren't that many possiblities
2^32 out there.
Perhaps you could hash the DNS's if they have them.
This seems like a better bet, since you'd need a
dictionary to try it out.
Still the goal is to try to make something that tells
you if server at IP is an open relay, and does this
more cheaply than you yourself testing to see if it's
an open relay. The freenet lookup should be cheaper
right?
Otherwise people should just setup thier mail servers
to test anything that connects to them.
If you make it cheaper to do than checking the thing
dirrectly though, hackers will use it to avoid having
to check it dirrectly. Seems like kind of a Catch-22.
The way I understand the pro-RBL arguement is, these
servers are being used anyway; they have a limited
capacity, so you may as well inform the world so we
can block them.
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