Reverse PTR when WAN is Down

[Ephraim Silverberg]

When the WAN is down, reverse-ptr does not work even between local hosts
since the resolver is looking for a server for IN-ADDR.ARPA despite the
fact that all the information for local hosts is available from the LAN
nameserver.  Any idea how I can get reverse-ptr resolution for local hosts
to work even when the WAN is down?

Our named (version 8.2.3-REL) reverse-ptr data file starts out like this:

    $TTL 604800
    @       IN SOA shuldig.cs.huji.ac.il. danny.cs.huji.ac.il. (
            2002101602 ;Serial
            86400      ;Refresh
            21600      ;Retry
            1209600    ;Expire
            604800    );Minimum
            IN      NS      shuldig.cs.huji.ac.il.
            IN      NS      relay.huji.ac.il.
            IN      NS      cs.huji.ac.il.
            IN      NS      cse.huji.ac.il.
    $ORIGIN 0.65.132.IN-ADDR.ARPA.
    1       IN PTR ct5500-01.cs.huji.ac.il.
    31      IN PTR ct4700-01.cs.huji.ac.il.
    78      IN PTR cts-02.cs.huji.ac.il.
    [...]

Any assistance would be appreciated.
___________________________________________________________________________
Ephraim Silverberg, CSE System Group,        Phone number:    972-2-6585521
Hebrew University, Jerusalem, Israel.        Fax number:      972-2-5617723
WWW: http://www.cs.huji.ac.il/~ephraim       E-mail: ephraim at cse.huji.ac.il