Riku Voipio: Bad homework
Roland Fails at homework, and Wouter gets detention for copying Rolands homework. Any given spam detection method is workaroundable, but uribl happens to be one the hardest ones so far.
What Roland is missing, is that spamassassin 3.0:s uribl module checks against the domain names too. So if cheap-placebo-meds.biz points to zombie servers at unblacklisted ip addressess, It will still get a score if cheap-placebo-meds.biz is already blacklisted as a domain.
They could still drop the domain from the url entirely, and just add an zombie IP, but that would be terribly unreliable. The zombie-hosted sites I have seen usually had 10-15 round-robin addressess, of which 2-3 actually responded.
Another escalation spammers could do is to buy (more) throwaway domains. But there is already work to detect fresh/throway domains and list them, since typically spammer domains are less than one month old.
But if zombie hosted spammer sites come a big problem, the uribl module can check against dial-up blacklists as well, of course at the great annoyance of everyone who has web site on their dial-up and advertisize it to their friends via email...
What spammers will probably start doing, is setting up (more) gateway/redirection sites on various free webspace sites like geocities, or start obfuscating their addressess (isn't that poetic justice: "please go to cheap dash meds 123 dot biz". In any case, their links will look more suspicous than before, which hopefully will damage their sales.
In other news, excuse me, it's nice that GNU has locales and standard ways of doing things, but does /bin/true really need all this??
What Roland is missing, is that spamassassin 3.0:s uribl module checks against the domain names too. So if cheap-placebo-meds.biz points to zombie servers at unblacklisted ip addressess, It will still get a score if cheap-placebo-meds.biz is already blacklisted as a domain.
They could still drop the domain from the url entirely, and just add an zombie IP, but that would be terribly unreliable. The zombie-hosted sites I have seen usually had 10-15 round-robin addressess, of which 2-3 actually responded.
Another escalation spammers could do is to buy (more) throwaway domains. But there is already work to detect fresh/throway domains and list them, since typically spammer domains are less than one month old.
But if zombie hosted spammer sites come a big problem, the uribl module can check against dial-up blacklists as well, of course at the great annoyance of everyone who has web site on their dial-up and advertisize it to their friends via email...
What spammers will probably start doing, is setting up (more) gateway/redirection sites on various free webspace sites like geocities, or start obfuscating their addressess (isn't that poetic justice: "please go to cheap dash meds 123 dot biz". In any case, their links will look more suspicous than before, which hopefully will damage their sales.
In other news, excuse me, it's nice that GNU has locales and standard ways of doing things, but does /bin/true really need all this??


Then I had to edit out the build instructions for the