ChallengeResponse For Linux. Does It Exist 5066

Nothing I care to read. Trollfarts are not my thing.

Yes, there are Challenge-Response Systems (CRSs) for Linux. Google this string:

"challenge response" OR "challenge-response"

But be wary: The Web is like the Usenet: Anyone can post anything there and spammers and trolls REALLY hate CRSs because they can't beat them.

Needless to say, they have no qualms about lying.

For my little mickey mouse (but very effective) program, see:

(I don't answer questions about it on the Usenet. You'll have to mail me and get past my CRS. See the contact page on my website.)

For a very simple CRS if you aleady have good spam filtering:

Or take a look at your ISP-MSP's spam filtering services. ISPs like Earthink have been offering CRS protection to all of their clients for years.

And yes, they are RFC-compliant:

RFC 3834: Recommendations for Automatic Responses to Electronic Mail

CRSs have been used by businesses and non-profit orgs for decades, to weed out spammers and trolls.

Their use is one of the reasons that most mailing lists don't have problems with spammers and trolls.

Sign up for a mailing list, and you get an auto-response that needs to be returned before your subscription is accepted. That's a Challenge-Response.

Email a big company or non-profit org and often you will get an auto-response asking you to go to a website and fill out a form. That's a Challenge-Response: If you didn't use your real address, then you won't get the auto-response and won't fill out the little webform and your mail will be dumped.

Complain about abuse on the Usenet to an NSP, and they'll mail you back at the address you provided. If you don't return that mail, then your complaint will be dumped. That's a CR.

AC

--