Hi there @annefreeman120,

I believe that what you could do is get in touch with SEMrush support team and ask them for their IP ranges in order to allow them via your Cloudflare firewall.

To allow IP addresses via your CloudFlare firewall you can follow these steps here:

• Log in to your Cloudflare account.
• Select your domain.
• Click the Firewall app.
• Click on the Tools tab.
• Under IP Access Rules, enter the following details:
• Enter the Value as an IP, IP range, or two-letter country code.
• Select an Action.
• Select whether the rule applies to This website or All websites in the account.
• (Optional) add a Note (i.e. SEMrush).
• Click Add.

Hope that this helps!
Regards,
Bobby