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How to create a 4096bit ssl certificate

Posted on October 9, 2025

How to create a 4096bit ssl certificate



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Hi there,

You can create a 4096-bit SSL certificate with OpenSSL using this command:

openssl genrsa -out server.key 4096
openssl req -new -key server.key -out server.csr

Then you can use the CSR (server.csr) to get the certificate from your CA or use it to generate a self-signed cert if you’re testing.

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