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Re: UDP packet/DNS server

  • From: Tatsuya Kawasaki
  • Date: Tue Sep 29 22:01:12 1998

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

かわさき
TK3197

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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
> >  ekgermann@cctec.com                                 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
> > 
> 



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