Cloudflare blocking Klaviyo user agent - Help with IP Rules
Cloudflare is blocking the Klaviyo user agent for some reason, and we can't update and sync our product catalogue. This is the log from Klaviyo:
Our Engineering team has provided the following information, which includes Cloudflare's Ray ID:
/1.0"
HTTP/2 403
date: Mon, 22 Sep 2025 16:35:47 GMT
cf-cache-status: DYNAMIC
nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
report-to: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=<REDACTED>"}]}
server: cloudflare
cf-ray: 983337ada969d645-IAD
alt-svc: h3=":443"; ma=86400
Access forbidden
The request originated from 207.211.192.23.
Could you please check with Cloudflare to understand why this request was blocked despite the whitelist rule for this IP address being in place? Let me know what you find, and we’ll continue to assist from there.
I have a rule that includes all of Klaviyos IP's and they are set to SKIP, but for some reason Cloudflare still blocks them. Can you help?
2 Replies
You can view the rule that caused a block or challenge page to be presented at https://dash.cloudflare.com/?to=/:account/:zone/security/events
Bot Fight Mode cannot be skipped by WAF Rules or other "Bypass" actions.
Bot Fight Mode is a very aggressive solution that should only be enabled if you are actively under attack.
Remedies:
- Upgrade to a Paid plan and use Super Bot Fight Mode
- Disable Bot Fight Mode
In the log the provided IP's are skipped.
Oh, so It's not from Cloudflare, but more llikely from our server?
Okay, I will check this out, thank you! :MeowHeartCloudflare:
Yep, that was from our Server! Massive thanks to you!