Creating the Certificate Signing Request (CSR) and the public/private keypair offline is recommended when deploying server certificates on multiple ArubaOS Mobility Controllers (MCs). This method enhances security by minimizing the exposure of private keys. By creating and handling these components offline, administrators can maintain better control over the keys and ensure their security before deploying them across multiple devices. This approach also simplifies the management of certificates on multiple controllers, as the same certificate can be installed more securely and efficiently.
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ArubaOS documentation on CSR creation and certificate management.