Anti Trackback and Comment Spam Methods
By Bobby Masteria
What is spam ?
Spam is text or URL, in one or several exemplars,
neither being waited nor wished, not having, neither directly nor
from its shipper, no relationship neither with the recipient nor with
a possible
resource related to the recipient.
How does spam appears in blogs ?
- Through the comments’ body and commentator’s URL.
- Through trackbacks’ excerpt and permalink’s URL
What are the anti-spam methods?
- Authentication by connection
- CAPTCHA
- Black List
- Bayesian Filter
Other methods to minimize spam :
- Time Interval between submissions / Number of submissions per
hour.
- DDD.
- Secure Form Mode : force page and submission to be manual.
- Rank Denial : Directs hyperlinks an intermediary server.
- Autoclose after N days: entry stops accepting comments or trackbacks.
Which data are analyzed by these methods ?
Active methods do analyze the shipper to check if
it’s:
- a spamer by coparing its IP address with blacklisted ones.
- authorized by authentication
- a human by CAPTCHA
Passive methods do analyze :
- comment’s data:
- nickname
- eMail address
- URL
- message
- trackback’s data (concerning the shipping blog):
- blog’s name
- entry’s title
- entry’s excerpt
- permalink’s URL
What are the limits to these methods ?
Cross use of several of these methods allows excellent
results concerning comments, but weak results concerning trackbacks.
Difference between comments and trackbacks is that
comments are sent from the recipient’s blog, which allow all
above methods to be used, whereas trackbacks are sent from the shipping
blog (this avoids the use and need of 2 interfaces).
- Consequently it’s not possible to use CAPTCHA, authentication
and Secure Form Mode methods with trackbacks.
- Another big problem, when all the trackback’s data are unknown,
especially the IP address, it is quite impossible to avoid spam,
mainly because the blacklist and the bayesian filter are becoming
inefficient.
- Last inconvenient, trackback autodiscovery is usefull for bookmarklets
but also to spamers to who it gives the trackback URL.
Glimpse
on futures anti-trackback-spam methods
Copyright © 2004 - Reflexive-Blog - Bobby Masteria
Webdesigner - WebMaster - MetaBlogger - Multi-Blogger - BlogMaster
Licence
- Reflexive-Blog
- Anti
Trackback and Comment Spam Methods - Méthodes
Anti Spam de Trackback et de Commentaire
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