Defend Your WordPress Web site from Dangerous Bots for Free with Defender’s Person Agent Banning

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Learn to shield your website from dangerous bots whereas permitting visits from protected consumer brokers with our all-in-one WordPress safety plugin Defender.

Your web site’s safety is underneath menace 24/7, whether or not it’s from a critical DDoS assault,  XSS assault, SQL injections, or simply annoying spam. Defender’s Person Agent Banning not solely provides your WordPress website strong safety in opposition to requests from dangerous consumer brokers on the server stage, it additionally helps to release server assets for all of your good site visitors.

And it’s all out there for gratis (get it at no cost at

Defender involves the celebration with Person Agent Banning.

On this article, we’ll cowl:

What Is a Person Agent?
Good Bots vs Dangerous Bots
How To Set Up Defender’s Person Agent Banning

Let’s dive in…

What Is a Person Agent?

Let’s begin with this definition from Wikipedia…

A consumer agent is any software program, appearing on behalf of a consumer, which retrieves, renders and facilitates end-user interplay with Internet content material.

Community servers, e-mail shoppers, search engines like google, and internet browsers are all examples of consumer brokers.

Basically, a consumer agent is a “string” (i.e. a line of textual content) that identifies a shopper to a server. In different phrases, it’s a method of claiming “Whats up! That is who I’m” to an online server.

An internet browser, for instance, features a Person-Agent discipline in its HTTP header figuring out the browser and working system to the net server (e.g. Chrome Browser Model 94.0.4606.61 on Home windows 10).

The consumer agent string format for internet browsers reads as follows:

Mozilla/[version] ([system and browser information]) [platform] ([platform details]) [extensions]

This enables every internet browser to have its personal, distinctive consumer agent and the contents of the consumer agent discipline can fluctuate from browser to browser.

After I seemed up my internet browser’s consumer agent, for instance, I obtained the next:

My internet browser’s consumer agent. (Supply:

This info is helpful to an online server, as a result of it permits the net server to serve totally different internet pages to totally different internet browsers and totally different working programs (e.g. ship cell pages to cell internet browsers, present totally different pages to totally different platforms or working programs, and even show “please improve your browser” messages to older internet browsers).

Good Bots vs Dangerous Bots

Most web site house owners need their content material to be discovered on the net, particularly by search engines like google like Google.

Google routinely discovers and scans web sites by following hyperlinks from one webpage to a different using consumer brokers referred to as “crawlers”. Google’s important crawler, for instance, is known as Googlebot.

Most web site house owners, subsequently, would contemplate Googlebot to be a “good bot” and welcome having this consumer agent go to their web site through their internet server.

Not all consumer brokers, nonetheless, are good guys.

Undesirable guests like spammers, scrapers, e-mail harvesters, and malicious bots can even make use of consumer brokers to threaten the safety of your info and your web site.

For instance…

Instance of Cross Web site Scripting (XSS) assault

A consumer agent title might be modified, by having a hyperlink with a malicious JS code in it:


Right here is the issue:

A server will belief the consumer agent title and retailer the above string (e.g. in a Internet Analytical software).
An actual consumer (e.g. an admin) then accesses the software storing the string.
When the web page with the logs containing the string is opened, the browser will then parse all listed consumer brokers and execute the script. This script generally is a easy redirect, or a spammy pop-up.

Defender’s Person Agent Banning protects in opposition to the XSS assault from safety headers by stopping the web page from loading when such a Person Agent title is detected.

Instance of SQL injections

That is much like the above. A Person Agent title can comprise an SQL question, for instance, a single quote ‘.

If the server doesn’t have a excessive stage of safety, it will probably trigger an error, the place an attacker can then begin experimenting and executing SQL queries.

So, how are you going to let the nice bots in and forestall the dangerous bots from visiting your website?

That is the place Defender involves the rescue.

How To Set Up Defender’s Person Agent Banning

Defender’s Person Agent Banning characteristic helps you to specify which consumer brokers you’ll and won’t enable to go to your website.

To entry and allow this characteristic, log into your website and go to Defender > Firewall

Entry Defender’s Person Agent Banning from the Firewall menu.

Click on the button to activate the characteristic…

Activate Defender’s Person Agent Banning characteristic.

You may completely ban malicious bots and dangerous consumer brokers from accessing your website by getting into these into the Blocklist discipline (one per line). Defender consists of some frequent dangerous bots within the Blocklist by default. You may add extra dangerous bots to the listing by looking on-line for “dangerous consumer agent block lists”.

Ban consumer brokers by including them to the Blocklist.

Conversely, you possibly can add good bots and consumer brokers to the Allowlist discipline to permit them everlasting entry to your website. Defender consists of plenty of official bots and consumer brokers to this listing by default.

Enable good bots everlasting entry to your website utilizing the Allowlist.

Observe: For those who add the identical consumer agent or bot to each fields, the Allowlist will override the Blocklist.

The Message part helps you to customise and preview the message that can show in your website to blocked customers all through the lockout interval.

Add a customized message to blocked customers.

Bots are recognized by their IP handle and HTTP Header Person-Agent. If the HTTP Header Person-Agent is lacking, this must be thought to be an uncommon and suspicious pink flag.  Usually, these include an SQL injection. On this case, the best choice is to dam their IP handle.

You may block any IP addresses that ship Submit requests with empty referer and consumer agent headers within the Empty Headers part. (Observe: the phrase referer shouldn’t be misspelled.)

Activate this perform to dam IP addresses with empty headers.

Observe: Spam bots generally should not have a referer or HTTP header, so activating this selection can even assist forestall spammy type submissions and feedback.

Lastly, you possibly can simply deactivate the characteristic at any time for those who not wish to use it.

Deactivate Defender’s Person Agent Banning characteristic with only one click on.

Keep in mind to click on the Save button when completed to replace your plugin settings.

To view a log of Defender’s exercise and make sure that the characteristic is lively and dealing, choose Firewalls > Logs within the plugin’s menu.

Defender begins banning dangerous consumer brokers immediately!

No Whiffs or Bots

With Defender’s Person Agent Banning characteristic activated, dangerous bots received’t even get a sniff in and malicious consumer brokers will strike out each time they go to your website. Defender goes straight to work banning and locking out consumer brokers as per your configured lockout settings.

Moreover, Defender’s steady monitoring protects your website whereas saving server assets for official site visitors, thus serving to to additional enhance your website’s efficiency.

For extra info or assist utilizing this characteristic, take a look at our documentation part or contact our 24/7 help crew.

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