public void enableFileTransferProxy(boolean isEnabled) {
        JiveGlobals.setProperty(FileTransferProxy.JIVEPROPERTY_PROXY_ENABLED,
                                Boolean.toString(isEnabled));
        setEnabled( isEnabled );
    }
Returns the IP address(es) that the proxy connection manager is servicing.
xmppserver/src/main/java/org/jivesoftware/openfire/filetransfer/proxy/FileTransferProxy.java