CSS Certificate Spider

Operator

Certified Security Solutions

Type

Crawler

Official page

css-security.com

robots.txt token

Spider

In Vireo

Excluded, reported under Other bots

What it does

Description unavailable from knownagents.com

ai.robots.txt describes its function as: AI Data Scrapers

Source: ai.robots.txt.

User agent

Requests from CSS Certificate Spider carry a user agent like this:

CSS Certificate Spider (http://www.css-security.com/certificatespider/)

Device Detector identifies it with this pattern (a case-insensitive regular expression):

CSS Certificate Spider

Anyone can put any name in a user agent. Where the operator publishes IP ranges, checking the request's address against them is the way to confirm a visit is genuine.

How to block or allow CSS Certificate Spider

Add a group for its token to the robots.txt file at the root of your site. To keep it out of the whole site:

User-agent: Spider
Disallow: /

To let it crawl everything, use an empty Disallow: or Allow: / instead. WordPress serves a virtual robots.txt that many SEO plugins let you edit. A real robots.txt file uploaded to the site root takes its place.

robots.txt is a request, so it only works on crawlers that honour it. A bot that ignores it has to be blocked at the server or firewall, by user agent or IP address.

How Vireo counts CSS Certificate Spider

Vireo keeps requests from CSS Certificate Spider out of your pageviews and visitors and counts them on its bot report under Other bots, so you can see how much it left out rather than wonder why your server logs show more traffic.

Checked by running Vireo Analytics' own bot filter over CSS Certificate Spider's user agents.

Sources

• CSS Certificate Spider information page (css-security.com)
• Matomo Device Detector, bots.yml (LGPL-3.0)
• ai.robots.txt (MIT)