How to install a pfx wildcard certificate on Barracuda Spam & Virus filter

  1. Export wildcard pfx from Windows machine
  2. Download openssl for windows –
  3. Copy wildcard pfx to machine where openssl was installed
  4. Run the following commands:
    openssl.exe pkcs12 -in nameofwildcard.pfx -nocerts -out Keyname.pem
    openssl.exe pkcs12 -in nameofwildcard.pfx -clcerts -nokeys -out Certname.pem
    openssl.exe rsa -in Keyname.pem-out Keyname-nokey.pem
  5. Open up barracuda interface and go to Advanced – Secure Administration
  6. In the Trusted (Signed by a trusted CA) section, add Certname.pem into the Signed Certificate field and keyname-nokey.pem into the Private Key field.
  7. Click Upload.
  8. Change Certificate type to “Trusted (Signed by a trusted CA)”
  9. Save changes


Credit to Cycure for a well written openssl guide.