I was wondering if someone can provide me with a bit of help, with installing a Comodo Cert to secure ispconfig3 on ubuntu. I wish to secure the ISPConfig 3 Panel & Maybe it's services, using these sent certificate files below. Comodo sent Certificate files: Root CA Certificate - COMODORSADomainValidationSecureServerCA.crt Intermediate CA Certificate - COMODORSAAddTrustCA.crt Intermediate CA Certificate - AddTrustExternalCARoot.crt Domain's SSL Certificate - www_example_com.crt I have already setup SSL for my domain using the above certs using the ISPConfig3 panel SSL Option, Ill explain the Process briefly of setting up my domain with SSL. I purchased a SSL Cert from comodo. Generated CSR using ispconfig3 SSL Generator, Sent the CSR to Comodo, Received Cert, Added Cert to panel, and added bundled via ISPConfig 3 SSL. https://mydomain.com, now is runs on https, and self signed error / warning with browsers gone. https works fine, all content displays fine on site. Visiting my ISPConfig3 Panel link is: https://mydomain.com:port (i do not use sub domain for ISPConfig3) Error due to self signed certificate My Question's. How do i secure ISPConfig3, and its service's the same way i secured my website's domain? I noticed , that ISPConfig3 Control panel uses different cert type files & format's than the websites.. Location for ISPConfig 3 cert's in: /usr/local/ispconfig/interface/ssl ISPConfig3 Certs Listed below. cert.pem csr.pem ispserver.crt ispserver.csr ispserver.key ispserver.keysecure key.enc.pem How do i use below cert's? how do i convert for use of securing ISPConfig3. I wish to remove the SSL Self Signed Waring for the control panel. COMODORSADomainValidationSecureServerCA.crt COMODORSAAddTrustCA.crt AddTrustExternalCARoot.crt www_example_com.crt Thanks for any help in advanced..