Would it be possible for an add-on that would check the IP address of someone registering for a Reverse DNS entry to authenticate that IP address?
In the past week, our site was spammed by two separate registered users and when I did a Reverse DNS entry check the result said there was no DNS entry (PTR) for those IP addresses.
As an anti-spam measure, if a Reverse DNS check found no record an error message could be displayed to the user preventing him from registering and posting.
I asked my webhost and he said:
Quote:
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It's not something we can easily do with Apache, it'd have to be an addon for VBulletin, and I don't know if there is such an addon available, the best place to look would probably be the VBulletin support forums.
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Can it be done? I know that large email service providers do this as an anti-spam measure. Can vBulletin do it?
05-19-2006, 03:19 PM
Reverse DNS check
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