how to protect website from spammer

[Danielsmith12]

How to protect website from spammer?

[pablohunt1994]

We all hate spam, but it's an unfortunate reality of the digital world. As soon as you create a website and give people a way to communicate with you, spammers are going to start shoveling content through it. The good news is that Doodlekit has built in tools to help you deal with spam on your website.
Types of Spam
For a typical website there are few areas that spammers focus. We concentrate on filtering spam coming though the contact us form, blog comments, forum topics and custom form entries. These are the areas that allow public submissions, are can be easily setup to transmit spam automatically.
There are two types of spamming mechanisms, automated "bots" and manual. Bots are applications written to scour the Internet looking for any web form they can send spam through. They don't care what the form is for, or who it's going to, because if they just keep sending they figure eventually it will get where they want it. There are also manual spammers, which may be a farm of people at computers manually going through websites and typing in spam messages to blog comments and other forms on your website.
The bottom line is that if Google can find your website, the spammers can too.
Automatic Spam Filter
The first line of defense we have against spam is an automated filter that all blog comments, contact us submissions, and forum topics go through. We use a third-party service that compares this content, as well as the IP Address of the user to a list of known spam. This works in much the same way as email spam filters like Gmail. Unfortunately this filter can sometimes think that good submissions are spam, which is why it's important to moderate your spam and look for false positives. I'll cover this more below.
Human Verification
One way to quickly filter out Bots is to add something to the form that only a human can do. You've probably seen "Captchas" all over then Internet. These are those annoying jumbled up words that you have to enter in the box. Unfortunately spammers are getting better and better about automatically figuring these out.
We use a different service called Are You a Human This uses a game that requires interaction and knowledge to complete. Not only is this harder for a spammer to crack, but I find it's much less frustrating for the user. You can see an example below in the blog comments form for this post.
You can enable or disable this feature for blog comments, the contact us form, or for individual custom forms.
Spam Word Filter
If there are specific words that you're seeing a lot that aren't being block by the Automatic Spam Filter, you can add them to this word list. Be careful about how specific you are. For example, we were getting lots of spam with the word "Ugg" in it. If we just put "ugg" in our word list, it may block content like "luggage". Instead you can block specific phrases like "ugg boots".

[rizwan]

try always this 2 fillters 1st.Filtering out Foreign Hostnames 2nd Filtering out Referral Spam Bots..

[Talaa]

You can install Akismet plugin to protect your site from spammers, it helps you filter most parts of spam. Also, you can set up discussion settings against spammers. Visit WordPress dashboard> settings > discussion and there are a few options for stoping spam, check the options depending your needs. For more details, please check out this post for stopping comment spam without plugin.

[readfashion]

Can be set in the general mailbox

[securedfiling]

Update your software and plugins
Sanitize input fields
Use a CAPTCHA
Keep track of backlink profiles
Install a web application firewall (WAF) to prevent spammy comments

[Ravina123]

8 Ways to Protect Web Forms from Spam

1. Spam… You probably hate this word, don't you?
2. Install CAPTCHA plugin. CAPTCHA is one of the most prevalent and popular ways of spam blocking.
3. Do not use auto-responders.
4. “Honey Pot” – a trap for spambot.
5. Limit the login attempts.
6. Use test questions.
7. Try to embed session tokens.
8. Use special tools like Akismet.

[Lucifer12]

These are the methods used to protect your website from spammers.

1. Keep your domain private. You may not realize this, but when you registered your website’s domain name (www.YourName.com[/URL]), your email address is a public record if you didn’t make it personal. All domain names have a record where your email address is on file and can be looked up by anyone in many cases for free.

2. Use a honeypot. A honeypot is a hidden question on your online form that, when it gets filled out, you know, was a spam bot that filled out the form.

3. Prevent email harvesting. If you list your email address on your website, it’s being harvested by email spam bot programs. One way is to replace your email with an image of your email. Since these bots can only read text, they won’t be able to read your email address, and humans can still see it.

4. Use CAPTCHA on your forms. Adding a CAPTCHA to your documents is a great way to prevent spam bots from filling out your website’s forms and sending your spam. If you’re unsure what a CAPTCHA is, it’s a challenging question or image to verify that you’re a human fill out a form online.

5. Block emerging countries. Unfortunately, some countries seem to have a lot of bad actors. If your website’s audience is primarily US-based or a few countries, you may want to block all other countries from viewing your website.

[Rocky]

1. Keep your domain private.
2. Use a honeypot.
3. Block bad countries.
4. Use CAPTCHA on your forms.
5. Prevent email harvesting.