Multi IP address zimbra server

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Rama
Posts: 7
Joined: Fri Feb 09, 2018 12:00 pm

Multi IP address zimbra server

Postby Rama » Thu Aug 09, 2018 8:54 pm

Hi,
As of now our ZCS is running on a single server which getting sudden load spikes during peak hours. We are in process of build a robust setup with Zimba multi server where 2 servers will be configured with Multi Master LDAP along with proxy MTA. The mailbox server will be on another host. In our existing setup only one NATted public IP serves all requests. Does my new architecture require two public IP's one for MTA and one for mailbox host? or the current configured NAT IP is sufficient? Please suggest and guide me.


Rama
Posts: 7
Joined: Fri Feb 09, 2018 12:00 pm

Re: Multi IP address zimbra server

Postby Rama » Fri Aug 10, 2018 5:00 pm

Hi,

Thank you. What would be web url for external users can access their mailboxes. In our case the MTA name will be prodmta.domain.colo for which public IP is NATed and prodmb.domain.colo is mailbox host has no NATed. Can you please correct me, if am wrong.
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zimico
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Re: Multi IP address zimbra server

Postby zimico » Sun Aug 12, 2018 4:31 am

Hi Rama,

If you have multi server you can access each server by difference IPs or use the same (one) IP for all servers/services. For example, you can use 1 static IP for MTA and another one for mailbox server or you can use only one static IP and do port NATs for those servers. The important thing is you must have the right DNS configuration when you use NAT network (called split DNS).

as I understand, you are having 2 servers: MTA/Proxy/LDAP server and Mailbox Server. 2 servers are located behind your firewall/router and you use NAT to allow user from internet can access servers. You can use 2 different static/routable IP addresses and from Internet DNS you will have something like this:
prodmta.domain.colo A your_first_static_IP
prodmb.domain.colo A your_second_static_IP
domain.colo MX prodmta.
domain.colo TXT "spf=1 mx ~all"

your_first_static_IP PTR prodmta.domain.colo

and you do NAT from your_first_static_IP to your MTA server's LAN IP1, from your_second_static_IP to your Mailbox server's LAN IP2.
Of course, you need to setup a internal DNS system according to split DNS wiki like:
prodmta.domain.colo A LAN_IP1
prodmb.domain.colo A LAN_IP2
domain.colo MX prodmta.

All this configuration is flexible and depend on your network. You can have only one static IP, or use only one FQDN or use different FQDN for different service/servers, etc,... The final result you need are right MX record, A record, SPF record and PTR record.

Regards,
Rama
Posts: 7
Joined: Fri Feb 09, 2018 12:00 pm

Re: Multi IP address zimbra server

Postby Rama » Mon Aug 13, 2018 8:04 pm

Hi,
Thank you very much. Now users are able to access their mailboxes via our MTA hostname, prodmta.domain.colo. I just confused with the parameter "Web mail MTA Hostnames", which set localhost on port 25. What the hostname should it be prodmb.domain.colo(Mailbox hostname) or prodmta.domain.colo(MTA hostname).

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