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Re: Best practices to avoid virus and spam

2004-02-12 04:26:09

Keld Jørn Simonsen writes:
On Thu, Feb 12, 2004 at 11:58:06AM +0100, Arnt Gulbrandsen wrote:

 Keld Jørn Simonsen writes:
 >There are already RBLs that blacklist dynamic IPs. Not that I like it.
 >Yes, there will most likely be machines that automatically report
 >infected machines.

There already are. That's how the quick-reaction blacklists get their speed.

But it's not so bad. Lists such as cbl.abuseat.org and dsbl.org don't accept reports from the general public, and they will immediately remove an entry, by anyone's request.

Yes, that may solve the problem with DHCP dynamic IP MTAs, Once you have got your instance of a dynamic IP, you could check it at the RBL and get it off the blacklist, which would probably happen instantly. And then you can use your MTA. Would that work?

Even if an address is removed from the database immediately, the DNS update and caching effects generally add up to two hours delay. In theory it could be more.

Arnt