Reliable Penguin

Here's how to configure Zimbra services to bind to a specific IP address. These instructions apply to ZCS 5.x only. Assume that the IP address is [IP].

SMTP (TCP 25)

Edit /opt/zimbra/postfix/conf/master.cf.

Change:

smtp inet n - n - - smtpd

To:

[IP]:smtp inet n - n - - smtpd

WEB (TCP 80/443/admin ports)

Edit /opt/zimbra/jetty/etc/jetty.xml.in

After every line starting with:

<Set name="port">

Add:

<Set name="host">[IP]</Set>

POP/IMAP

Su to zimbra account.

Start zmprov:

./zmprov -s [IP]

Determine server name:

gas

Change bind addresses:

ms [DOMAIN] zimbraPop3BindAddress [IP]
ms [DOMAIN] zimbraPop3SSLBindAddress [IP]
ms [DOMAIN] zimbraImapBindAddress [IP]
ms [DOMAIN] zimbraImapSSLBindAddress [IP]


One additional trick is needed. Add these two IPTables rules to map 127.0.0.1:7071 to [IP]:7071.

/sbin/iptables -t nat -A PREROUTING -p tcp --destination 127.0.0.1 \
--dport 7071 -j DNAT --to-destination [IP]
/sbin/iptables -t nat -A OUTPUT -p tcp --destination 127.0.0.1 \
--dport 7071 -j DNAT --to-destination [IP]
/sbin/iptables -t nat -A PREROUTING -p tcp --destination 127.0.0.1 \
--dport 80 -j DNAT --to-destination [IP]
/sbin/iptables -t nat -A OUTPUT -p tcp --destination 127.0.0.1 \
--dport 80 -j DNAT --to-destination [IP]
/sbin/service iptables restart
/sbin/service iptables save