The Link Checker service in The Hub is where you’ll find tools to help you find and fix broken links on your site as well as broken links from 3rd-party sites that point to your site pages.

Each feature can be activated independently of the other.

22.2.1 Troubleshooting & Notes

Link to chapter 2

The Backlinks checker uses a 3rd-party API to scour the net for sites that link to your site. If you are getting 403 or other errors when running a scan, you may need to adjust your firewall settings.

If you ever need to allowlist the Backlinks checker’s user agent in your robots.txt file or a firewall, it is called:
DataForSeoBot

The UA string will appear as:
Mozilla/5.0 (compatible; DataForSeoBot; +https://dataforseo.com/dataforseo-bot)

If you need to allowlist the service’s IP addresses in your security plugin or your host’s firewall, add all of the following 21 IPs:

136.243.228.178
136.243.228.179
136.243.228.180
136.243.228.181
136.243.228.182
136.243.228.183
136.243.228.184
136.243.228.185
136.243.228.186
136.243.228.187
136.243.228.188
136.243.228.189
136.243.228.190
136.243.228.191
136.243.228.192
136.243.228.193
136.243.228.194
136.243.228.195
136.243.228.196
136.243.228.197
136.243.228.198

If you still have questions or need assistance after reading this document, please don’t hesitate to contact our support superheroes using the available options under the Support tab in your Hub or via the Support tab in your WPMU DEV Dashboard.

Link to getting support