Rublon API endpoint core.rublon.net uses the following static IP addresses:
• 15.197.196.218
• 3.33.239.9
If your firewall uses an allowlist, add both of the preceding IP addresses to your firewall’s allowlist and allow outbound communication over TCP port 443.
If your network policy allows filtering by FQDN, allow core.rublon.net.
Helpful Links
Rublon Admin Console - Documentation
How should I configure my firewall for Rublon MFA?
What to do if I opened Outbound Port 443 but still cannot connect to the Rublon API?
Which email addresses does Rublon send emails from?
Which IP addresses does Rublon MFA send emails from?
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