> Is the DNS suffix set correctly on the client machines?
> Try "ping wpad", if that doesn't work try "ping wpad.yourdomain.com".
> If that works your DNS suffix is not properly set.


yes, that works fine.
at first i thought it might be because wpad was set to a CNAME, where some
of the documentation mentions that it should be an A record, so i changed it
to an A record and that hasn't made any difference.

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