Repeated "Network transition occurred." message logged in DirectoryService.server.log

I already posted a reply regarding this problem in the [url=https://www.afp548.com/forum/viewtopic.php?showtopic=4778]"DirectoryService.server.log"[/url] topic but this is a more complete description of the situation. I'm experiencing the issue on Mac OS X Server 10.4.8 configured as Open Directory Master and acting as the gateway of the network. My DirectoryService.server.log looks like: [CODE] 2006-09-29 19:23:48 CEST - Network transition occurred. 2006-09-29 19:24:18 CEST - Network transition occurred. 2006-09-29 19:24:48 CEST - Network transition occurred. 2006-09-29 19:25:18 CEST - Network transition occurred. 2006-09-29 19:25:48 CEST - Network transition occurred. [/code] As you see, the message is printed every 30 seconds. I don't know if it's related but the server is also the DNS server for itself and its FQDN resolves to both the IPs of the internal and external interface: [CODE] % hostname myserver.mycompany.lan % host myserver myserver.mycompany.lan has address 192.168.x.x myserver.mycompany.lan has address 81.x.x.x [/code] We have a public static IP but no company domain name assigned, so I did this with Server Admin's DNS control panel to keep changeip happy and maintain the DNS server IP address on the internal subnetwork. Moreover, I got these errors in system.log: [CODE] Sep 29 18:04:46 myserver DirectoryService[1844]: Search connection failure: During an attempt to bind to [127.0.0.1] LDAP server. Sep 29 18:04:46 myserver DirectoryService[1844]: Search connection failure: Disabled future attempts to bind to [127.0.0.1] LDAP server for next 0 seconds. [/code] Sometimes, the server seems to hang (spinning beach ball of death and no more ssh logins) but continues to route network traffic and recovers by itself within some hours. I didn't find any related log entry when it happens. Any thoughts and/or possible explanations?