Unable to generate ssl certificate due to port 80 blocked by ISP

Hi, Is ther any ways to generate the certificate using custom port? We are unable to communicate to let’s encrypt server since port 80 is blocked in Dubai. Please advise

You can use port 443 - Certbot doesn’t currently support it, but some other clients do. You can’t use just any arbitrary port however. If neither port 80 nor 443 is available to you, the only remaining alternative is to use DNS verification.

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