WHMcs payment gateway crashes due to error


#1

I have WHMcs panel, after entering PayPal and Stripe and progressing, I get error.
I believe I need to whitelist the IPs - but what are they?
Can assist please.
Thanks


#2

This is what happens:

"Gateway Timeout

The gateway did not receive a timely response from the upstream server or application.

Additionally, a 504 Gateway Timeout error was encountered while trying to use an ErrorDocument to handle the request."


#3

Cloudflare ips are here, https://www.cloudflare.com/ips/.


#4

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