Openfire 3.5.0, Ubuntu 7.10 Server.
Communication with remote jabber users and transports works perfectly.
BUT: clients cant connect to remote jabber or irc conferences.
The part of the error.log:
2008.04.09 12:50:51 [org.jivesoftware.openfire.session.LocalOutgoingServerSession.createOutgoingS
es sion(LocalOutgoingServerSession.java:258)] Error trying to connect to remote server: cz(DNS lookup: cz:5269)
java.net.UnknownHostException: cz
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:177)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:519)
at org.jivesoftware.openfire.session.LocalOutgoingServerSession.createOutgoingSess ion(LocalOutgoingServerSession.java:253)
at org.jivesoftware.openfire.session.LocalOutgoingServerSession.authenticateDomain (LocalOutgoingServerSession.java:184)
at org.jivesoftware.openfire.server.OutgoingSessionPromise$PacketsProcessor.sendPa cket(OutgoingSessionPromise.java:213)
at org.jivesoftware.openfire.server.OutgoingSessionPromise$PacketsProcessor.run(Ou tgoingSessionPromise.java:193)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java: 885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
How can i fix this problem?