this may help.

来源: 于 2009-09-15 10:16:03 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

http://web.wenxuecity.com/BBSView.php?SubID=smsh&MsgID=5011
although the ATA is different, however, the configuration should be the same for the forwarding part.