I want to close out this threat as solved. Most of the issue here was the way my provider's hosted CenstOS and RHEL images were preconfigured. Doc was not as good as it should have been.
Bottom line...here's what I learned
1) Zimbra ZCS 6.0.1 installed fine on CentOS 5.1 64-bit.
2) Zimbra will listen on all interfaces
3) Needed to mod provider's preconfigured iptables to allow access to Admin panel and SMTP. It was restricted to SSH and HTTP only.
4) Configured ZCS to sit behind a mail relay through MTA config in Admin panel
5) Limited access to public IP Port 25 through iptables firewall so only private IP will send/receive smtp
System is now fully functional.. |