In this section, we will learn how to secure the MCMP channel. This means that the MCMP messages will be transferred over SSL.
In the mod_cluster documentation, we named the protocol MCMP, which stands for Mod-Cluster Management Protocol.
In design, mod_cluster uses SSL mutual authentication to secure the MCMP channel. This means that we must create certificates for both the servers. EAP6 needs to trust the certificate provided by httpd; meanwhile, httpd must trust the certificate from the EAP6 server. So, we need two certificates instead of just one.
In the previous chapter, we created a self-signed certificate for httpd to enable HTTPS communication ...