Will block thousands of IP by IIS depress performance

Want to know if performance will down if block too much IP

[Eric]

Hi there

These days tooooo much spider fake as IE or something else and crasy claw pages from thousands of different IPs.

I am serious thinking block them automatically after caught by spider-trap.

So here is problem, if I do it, maybe will block thousands of IP all the time even I move the IP not come for one month.

Does this worth it? Will block too many IPs lower down the performance of IIS.

Thanks

[bill]

There are many threads here on blocking IPs [google.com]. There are certainly different schools of thought out there on the best way to do it. How would you be handling this on IIS?

[Eric]

I make a spider trap page, blocked by robots.txt file, and in a hidden link the normal visitor cannot see. The result is effective, caught lots of spiders, and put the IPs into a txt file. The last step is use asp.net load the IPs into IIS settings automatically.