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ShortlyIn short: try to analyze traffic: who. Who is doing that.? If it just one IP address - add this IP address to a black list and rest in peace. RecaptchareCAPTCHA is your friend.

Shortly: try to analyze traffic: who is doing that. If it just one IP - add this IP to black list and rest in peace. Recaptcha is your friend.

In short: try to analyze traffic. Who is doing that? If it just one IP address - add this IP address to a black list and rest in peace. reCAPTCHA is your friend.

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source | link

Shortly: try to analyze traffic: who is doing that. If it just one IP - add this IP to black list and rest in peace. Recaptcha is your friend.