I know I’m a few days late in posting this (was supposed to have this up last Friday), but in short the ReverseDOS anti-spam filter I installed recently works absolutely brilliantly.  Trackbacks have been enabled for a week, and aside from a few rogue spams that I didn’t have filters set up for (i.e. the links to block weren’t in the RDOS.config file), I am 99% spam free.  Having a quick look at my IIS logs, I can see that RDOS blocked ~2500 would be spams in a 7 day period, and I’ve had no complaints from anyone submitting genuine requests about not being able to get through. 

There was one spam that trickled through in spite of having a filter set up to block it, but it turns out it’s related to this post over at Mike Campbell’s blog; the spammer was simply overloading my server with concurrent bots (which is also configurable via the RDOS.config file)…apparently this has only happened once, so I’m leaving the default of 6 concurrent requests as is unless it happens again. 

For the first time in over a year, my blog is effectively spam free, with little or no effort needed on my part other than installing RDOS, and adding any spammer URL’s that make it past the default configuration.  Of all the anti-spam tools I’ve seen out in the wild, this is the easiest to install/configure, and is highly effective.  A must have in any bloggers toolbelt.

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