I've installed zimbra since one year in production environment, I've the zimbra 7.1.4_GA_2555.UBUNTU10_64 UBUNTU10_64 FOSS edition.
That's a very very good!
Now I've added a new WAN connection to balance traffic, my network is
WAN1 (IP_WAN1) ---> FIREWALL --->LAN--->ZIMBRA SERVER
WAN2 (IP_WAN2) ---> FIREWALL --->LAN--->ZIMBRA SERVER
On firewall i've two NAT RULES for Smtp
IP_WAN1:25 ----> Zimbra_Server:25
IP_WAN2:25 ----> Zimbra_Server:25
But when I try to acces from remote, for example by nmaI get this situation:
nmap on IP_WAN1
25/tcp open smtp
but when i try to access by nmap IP_WAN2
25/tcp filtered smtp
I've installed a second wan connection to have a failover by mx priority as:
IN MX 10 mail.mydomain.xy
IN MX 20 mail2.mydomain.xy
Please help me..
thank you ..