Hi Paul, xrootd uses the standard IP/hostname mapping interface. That should use whatever you've configured the kernel to use. So, xrootd doesn't care. If you can't get that to work (which I would be suprised) you can always use actual IP addresses. As for the the error, the host name can have no more than one asterisk in it. Andy On Wed, 6 Apr 2011, Paul T. Keener wrote: > I am trying to restrict access to my xrootd servers to a private network. > The documentation for xrd.allow specifically mentions DNS. Does xrootd force > the use of DNS, or does it use whatever name resolution is configured on the > local machine? > > I am getting log file lines along the lines of "XrdConfig: invalid allow type > - at3*.at3f". Is this a name resolution problem or something else? > > Thanks. > > -paul >