By default, Sitebulb will not crawl subdomain URLs it encounters, and will effectively treat them as external URLs. You can control how Sitebulb treats subdomain URLs via the Subdomain options from the left-hand menu of the audit setup.
By default, the subdomain settings are 'Check HTTP Status' - this means that subdomain URLs will be treated as external URLs, and Sitebulb will only run a HTTP status check on any subdomain it encounters.
This allows you to find any broken or redirected subdomain links. If you untick this box, Sitebulb will not run the status check on subdomain links.
How to crawl subdomain URLs as Internal
The second option is a bit more involved, 'Audit and Report' means that any subdomain URLs that Sitebulb encounters will be treated as internal URLs. In other words, ticking this box is 'how to crawl all subdomain URLs on a website'. Sitebulb will run all the normal 'internal checks' on these URLs, including internal link calculations.
Inclusion and Exclusion rules
You may not want the data from all subdomains in your audit, so you have the option to set inclusion and inclusion rules for subdomains, just like you would for internal or external URLs.
For example, if you only wanted to check or audit and report on a particular subdomain, you could do so by adding it to the List of Subdomains to Include.
When you come to look at the completed audit results, you will see that URLs from subdomains will now appear in the 'Internal URLs' lists, and they will have URL Rank (UR) scores.
Exclude all Subdomains
If you do not want Sitebulb to crawl subdomains at all, you can also configure this under Subdomain Options.
