--On Friday, April 25, 2003 4:31 PM +0200 Daniel Concepcion <dani@danielcp.net> wrote:
I think that the end of the spam and open relays will be when the smtp servers talk only with servers with trust.
Amazingly, even though I am posting in this thread... it is *not* about spam.
Uops, sorry for the mistake ;) But for me the spam is really a big problem when use open proxys or relays or misconfigured smtp servers.
Don't be fooled by the mention of open relays. Open proxies are abused for many purposes, of which spam is a minor one. I've seen open proxies in recent DoS source addresses for example.
The big problem in dDoS are the smurf, virus and trojans. Generally every machine infected have an open proxy. But the open proxy itself isn't dangerous. They are only use as intermediate hop for attack machines or control other trojans.
Sounds like you're arguing for widespread IP level blocking of open proxies then :)