cannot connect to the zcs upstream server

If it is installed as part of the install script then yes and there's a service called proxy that is running on the server. I haven't migrated any accounts yet, I was just trying out the webmail interface before going any further.ĭid I install the proxy service? I'm not sure. I'm not looking to run both servers in parallel, but to migrate everyone from Exchange to Zimbra and then remove Exchange from the mx records and our mail routing (mail is routed via a spam scanning proxy anyway). Is that correct (I'd rather use ssl if possible). I configured the service port for the Zimbra domain to be 443 and https. flags: qr rd ra QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 3 >HEADER<<- opcode: QUERY, status: NOERROR, id: 25496 Is that likely to be a problem? I'm only using a single server install. There are two MX because I've still got the exchange server running. I'm not sure why Phat is advertising iSCSI connections, but hey. Please contact your ZCS administrator to fix the problem. upstream server is failing to send back the response in time.upstream server is blocked by a firewall.Reason: Cannot connect to the ZCS upstream server. I've disabled SELinux on the server and I'm stumped! This didn't happen when I installed a test server with an evaluation license last year (Sadly, I've deleted that VM now). I've tried the test account and my admin account - same result. The login screen appears just fine, but after logging in I get a long wait followed by the time out message below. I was working through the installation tasks and set up a test account then tried to access the webmail. All services are running, I can get to the admin page of the Web GUI just fine. I've just started migrating from Exchange 2007 to Zimbra 8.6 on CentOS 7.5 and I've run into this issue.

Cannot connect to the zcs upstream server