OD Master on multiple IP addresses

Is there a way to setup an OD Master to actively work with multiple IP addresses? I've encountered a (Tiger) server which has been setup using a public IP address as its main network connection and a local 192.x address on its second NIC. Currently, OD only works on the public IP; if I use another public IP, I can connect to its directory and work with Kerberos. If I use a local IP address, however, I can connect to the server using Directory Access, but Kerberos doesn't work, and clients can't login using network accounts. I guess i could reformat the whole server with a local IP as its main network connection, but that's not gonna be fun. Is there a good workaround to make this server's Kerberos listen to clients using local IP addresses?