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- Path: sparky!uunet!sun-barr!olivea!spool.mu.edu!umn.edu!umeecs!nova!ellis
- From: ellis@nova.gmi.edu (Stew Ellis)
- Newsgroups: comp.protocols.tcp-ip.domains
- Subject: MX records, top-level domains, and DNS propagation delays
- Keywords: MX, DNS, propagation delays
- Message-ID: <ellis.715895140@nova>
- Date: 7 Sep 92 19:45:40 GMT
- Sender: news@zip.eecs.umich.edu (Mr. News)
- Organization: GMI Engineering&Management Institute, Flint, MI
- Lines: 53
-
- I am not certain this is the most appropriate group, so redirect me if it is
- not.
-
- I am a little confused by the relationship between domain name registration,
- MX records, the output of whois and the output of nslookup.
-
- The network administrator at our site wants to be more of an administrator
- than a computerist. While it is not my formal responsibility at our site, I
- was the only one with any real sendmail configuration experience when we
- went online with the Internet about 7 months ago, and I was the one who got
- basic email configured. I was also the only person around who had any real
- UNIX networking experience, though not with TCP/IP, so I got the DNS and NIS
- stuff working together ( that had something to do with reading the Sun
- Network admin manual thoroughly and understanding enough UNIX to understand
- the rest of it). Since then I have read a couple of other vendors' DNS
- docs, plus the new O'Reilly book on TCP/IP.
-
- First, since the site is registered as gmi.edu, which happens to gateway to
- the outside world through nova, why doesn't the the address user@gmi.edu
- work by default, instead of nova.gmi.edu? Is there anything that can be
- done at our site so that email AND telnet AND ftp AND rlogin, etc. would
- default to our main server (nova) when someone from the outside simply says
- gmi.edu? I gather we could reregister nova.gmi.edu as gmi.edu, but could we
- do something similar with local cname records or something?
-
- For email, I get the impression MX records should work. I put an MX record
- of the form:
- *.gmi.edu. in mx 0 nova.gmi.edu.
- in our named.hosts (that is not what it is called locally) file after all of
- the a records and aliases (just stuff like mailhost, etc).
- It sat there for over a month without seeming to take effect. I was
- unsophisticated about the uses of nslookup, so I am not sure whether it ever
- propagated or not before I removed it.
-
- Today, I put a line of the form:
- in MX 0 nova.gmi.edu
- right after the NS records at the top of the named.hosts file.
-
- Using the 'set type=any' command in nslookup, then typing 'gmi.edu' while
- using nova.gmi.edu as the server, it shows an mx record to be in effect. I
- can mail from myself locally, to myself as ellis@gmi.edu, which used to not
- work, but now does. If I set the server to other nearby ones however, they
- do not show the mx record in effect. Am I leaving out some important step,
- or does it take some multiple of forever to propagate? To get the changes
- to take effect locally, I did a 'kill -1 <pid of in.named>.
-
- Any help would be appreciated.
-
- --
- -- ___________________
- R.Stewart(Stew) Ellis, Assoc.Prof., (Off)313-762-9765 / _____ ______
- Humanities & Social Science, GMI Eng.& Mgmt. Inst. / / / / / /
- Flint, MI 48504 ellis@nova.gmi.edu /________/ / / / /
-