Path: utzoo!attcan!uunet!mailrus!cs.utexas.edu!usc!ucsd!ucbvax!TRANSARC.COM!Craig_Everhart From: Craig_Everhart@TRANSARC.COM Newsgroups: comp.mail.sendmail Subject: Re: BITNET hosts also internet? Message-ID: <8aaodzj0BwwOA3z30B@transarc.com> Date: 11 Jul 90 15:49:19 GMT References: Sender: daemon@ucbvax.BERKELEY.EDU Distribution: na Lines: 20 If you're going to define a fake domain full of CNAMEs, at least stay out of everybody else's way by defining them within ``your local domain,'' whatever that is. So if you're ohio-state.edu., and your name lookups will append .ohio-state.edu to any names going through, then define a zone bitnet.ohio-state.edu with all the CNAMEs you want. People's attempts to resolve drycas.bitnet will try appending your local domain (or a sequence of local domains), and all you have to do is ensure that one of those attempts turns drycas.bitnet into drycas.bitnet.ohio-state.edu, from which point you've defined a CNAME for that host as being drycas.club.cc.cmu.edu. Of course, this screws up the case where foo.bitnet doesn't have an Internet equivalent; ``foo.bitnet'' could get rewritten as your fake foo.bitnet.ohio-state.edu domain before being passed on elsewhere, but maybe you could stand on your head enough in your sendmail.cf to detect that case. Craig