hi, all In the xfer log file, there are line of request to servers and ones of reply from the servers. Do they come in pairs? If do, are they next to each other? Liu Mingxing CNNIC -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.isc.org/pipermail/bind-users/attachments/20141120/882eb8a0/attachment.html>