Error "Unable to retrive Zimbra GPG key for package validation"

Error "Unable to retrive Zimbra GPG key for package validation"

Information

During installation of ZCS, the process end with the following error:

"Importing Zimbra GPG key 
 ERROR: Unable to retrive Zimbra GPG key for package validation 
 Please fix system to allow normal package installation before proceeding". 

Resolution

From the installation log we see:

Executing: /tmp/tmp.mSlzRMclVa/gpg.1.sh --keyserver  keyserver.ubuntu.com  --recv-keys  9BE6ED79
gpg: requesting key 9BE6ED79 from hkp server keyserver.ubuntu.com
gpg: keyserver timed out
gpg: keyserver receive failed: keyserver error

To fix the above error we can do two things:

1. Open port 11371

11371	tcp,udp	hkp	OpenPGP HTTP Keyserver

2. Force it to use port 80:

gpg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 9BE6ED79

Either way will allow the installation continue. If you have further errors, you would need to look in to the install.log.