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Asked: 2026-05-31T01:24:15+00:00

I’m working on an Umbraco website and now I’ve built this contactform, on which

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I’m working on an Umbraco website and now I’ve built this contactform, on which users van send questions via e-mail to the admin.

I have this thought to “register” the IP from a client using Request.UserHostAddress, and when this client sends a message, i would disable the submitbutton for a minute or so. Just to avoid spam.

Anyone have a clue where I could store an array of these IP adresses temporarily?
?

Somewhere static I guess, but when I declare a list in my class, and there is only one user and he quits, the class gets recycled, or am I wrong?

Grtz and many thanks, Christophe

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  1. Editorial Team

    The simplest would probably be to use Asp.net cache.

    You should be able to do a Cache[“iplist”] = yourList;

    http://msdn.microsoft.com/en-us/library/18c1wd61%28v=vs.85%29.aspx

    But be aware blocking by IP might “lock out” people running on the same IP (some companies and universities have the same external IP).

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