North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: UDP packet/DNS server
Yeah, and if you do then sendmail will be broken, according to the v8.9.1 dox. It's called a wild-card MX record and is specifically not recommended, more than once, in the sendmail dox. I actually had NetCom tech support recommend it once, then I found out why it's not recommended, the hard way. When it comes to DNS, you're *much* better off by being specific, even if it means being verbose. At 10:39 AM 9/30/98 +0900, Tatsuya Kawasaki wrote: >Eric, > >thank for your reply. Though I did not agree with RFC I understand >what you are saying. >Do you think it is about time to change RFC? > >BTW, according to NDS and BIND 2nd Ed. by O'Reilly, it is okay for >MX record too. :-) > >TIA, >Tatsuya > >$B$+$o$5$-(B >TK3197 > >= = = = = = >Business Network Telecom (BNT) >$B%S%8%M%9%M%C%H%o!<%/%F%l%3%`3t<02q<R(B >$B")([email protected](B3-8-5 >31$B;35~%S%k(B6$B3,(B >TEL 03-5687-3945 FAX 03-5687-6009 >http://www.giganet.net > >On Tue, 29 Sep 1998, Eric Sobocinski wrote: > >> But it's perfectly ok for PTR records, though perhaps your example is less >> than ideal. The objection to the use of "*" was specific to NS records. >> An NS record should exist for a domain only if that domain exists. Since >> "*" matches any subdomain whether the domain exists or not, an NS record >> will be returned for non-existent subdomains and that violates the rule. >> Some records of other types are incompatible with "*" for similar reasons. >> The major point here is that any DNS record should reference either a valid >> response or another record that will lead to a response, and an NS record >> pointing to a zone file that doesn't exist is neither. >> >> Some folks will contend that the use of "*" in PTR records is bad form even >> though it is legal. That's a religious war, not a technical one. (I >> happen to like the use of "*", though I also believe that one should first >> apply specific host names whenever a static mapping allows). >> >> >> On Monday, 28 Sep 1998 at 21:02 EDT, Eric Germann wrote: >> > >> >you have to admit, it does save one hell of a lot of typing for the 1918 >> >IN-ADDR.ARPA delegations. >> > >> >rfc1918.db >> >---------- >> > >> >@ IN SOA ns1.xxx.net. hostmaster.xxx.net. ( >> > 1997101001 ; serial >> > 300 ; refresh >> > 300 ; retry >> > 604800 ; expire >> > 600) ; minimum >> > >> > IN NS ns1.xxx.net. >> > IN NS ns2.xxx.net. >> > >> > >> >* IN PTR rfc1918.xxx.net. >> >----------- >> > >> >then in named.bt >> > >> >primary 16.172.in-addr.arpa RFC1918.DB >> >primary 17.172.in-addr.arpa RFC1918.DB >> >primary 18.172.in-addr.arpa RFC1918.DB >> >primary 19.172.in-addr.arpa RFC1918.DB >> >primary 20.172.in-addr.arpa RFC1918.DB >> >primary 21.172.in-addr.arpa RFC1918.DB >> >primary 22.172.in-addr.arpa RFC1918.DB >> >primary 23.172.in-addr.arpa RFC1918.DB >> >primary 24.172.in-addr.arpa RFC1918.DB >> >primary 25.172.in-addr.arpa RFC1918.DB >> >primary 26.172.in-addr.arpa RFC1918.DB >> >primary 27.172.in-addr.arpa RFC1918.DB >> >primary 28.172.in-addr.arpa RFC1918.DB >> >primary 29.172.in-addr.arpa RFC1918.DB >> >primary 30.172.in-addr.arpa RFC1918.DB >> >primary 31.172.in-addr.arpa RFC1918.DB >> > >> >repeat for 10.x.x.x and 192.168 space >> > >> >To reiterate the question posed by the original poster, (donning asbestos), >> >why is this bad? >> > >> >Eric >> > >> > >> >At 08:31 AM 9/28/98 -0500, you wrote: >> >>Tatsuya Kawasaki wrote: >> >>>xyz.com. IN NS that.host >> >>>*.xyz.com In NS that.host >> >> >> >>Gah!! >> >> >> >>Illegal! >> >> >> >>Never use "*" in DNS! Just makes /bad things/ happen. >> >> >> >>@ IN SOA xyz.com. hostmaster.xyz.com. ( >> >> 1998092801 3600 1800 3600000 7200) >> >> >> >> ns ns1.xyz.com. >> >> ns ns2.xyz.com. >> >> >> >> mx 0 mail.xyz.com. >> >> >> >>mail a 1.2.3.4 >> >> mx 0 mail >> >> >> >>. etc .. >> >> >> >>-- >> >>jamie rishaw (efnet:gavroche) American Information Systems, >> >Inc. >> >> Tel:312.425.7140, FAX:312.425.7240 >> >> Help stop spam! router(config)#no ip routing >> >> thirty thousand feet above the earth..youre a beautiful thing.. >> >> >> > >> >========================================================================== >> > Eric Germann CCTec >> > [email protected] Van Wert, OH 45891 >> > http://www.cctec.com Ph: 419 968 2640 >> > Fax: 419 968 2641 >> > Network Design, Connectivity & System Integration Services >> > A Microsoft Solution Provider >> > >> > ___________________________________________________ Roeland M.J. Meyer, ISOC (InterNIC RM993) e-mail: <mailto:[email protected]>[email protected] Internet phone: hawk.mhsc.com Personal web pages: <http://www.mhsc.com/~rmeyer>www.mhsc.com/~rmeyer Company web-site: <http://www.mhsc.com/>www.mhsc.com/ ___________________________________________ I bet the human brain is a kludge. -- Marvin Minsky
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