I am trying to install zcs-NETWORK-4.0.3_GA_406 on RHEL4 and migrate users and mailboxes from zcs-3.0.0_GA_156 on FC4. The documentation I have states to set the LDAP master on the NETWORK system to the FC4 server and make sure the LDAP password matches the FC4 password. When I do this, the NETWORK install attempts to connect to the LDAP server on the FC4 system, and fails:

Checking ldap on mail.vyatta.com:389...FAILED ( /opt/zimbra/bin/ldapsearch -x -h mail.vyatta.com -p 389 -D uid=zimbra,cn=admins,cn=zimbra -w xxxxx
ldap_bind: Can't contact LDAP server (-1) )

I have verified that the LDAP is bound to port 389 on the FC4 system, and that it's in the firewall rules:

[dlk@mail src]$ netstat -an | grep LISTEN | grep 389
tcp 0 0* LISTEN
[dlk@mail src]$ sudo iptables -L -v | grep ldap
0 0 ACCEPT tcp -- any any anywhere anywhere state NEW tcp dpt:ldap

I can telnet to port 389 on the FC4 system via both IP and localhost, but cannot connect from another server on the same subnet, though the LISTEN above shows it should be bound to all interfaces. I've even tried flushing all my iptables rules and connecting, still to no avail.

Any ideas what the beef is here?