RE: [IMail Forum] Classless Delegation

len conrad Thu, 10 Jun 2004 15:08:47 -0700

@ IN SOA dns1.fresno.k12.ca.us. srfries.fresno.k12.ca.us. ( 11 ; serial number 3600 ; refresh 600 ; retry 86400 ; expire 3600 ) ; minimum TTL ; ; Zone NS records ;
@                       NS      dns1.fresno.k12.ca.us.
;
;  Zone records
;
149                     PTR     cs-mx-server.fresno.k12.ca.us.
150                     PTR     cs-nt-server.fresno.k12.ca.us.


here's the upstream's CNAME:

mx1# dig -x 63.202.51.149 ns

; <<>> DiG 9.2.3rc3 <<>> -x 63.202.51.149 ns
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 52974
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;149.51.202.63.in-addr.arpa.    IN      NS

;; ANSWER SECTION:
149.51.202.63.in-addr.arpa. 7192 IN     CNAME   149.144.51.202.63.in-addr.arpa.

see, it's a 5 octets instead of 4 octets.  the network address is I think:

63.202.51.148

... which is the node on which the classless reverse delegation has been done.

so you need to set up a zone file

144.51.202.63.in-addr.arpa.  SOA  etc...

which contains PTR records which match the CNAMES:

148.144.51.202.63.in-addr.arpa.  PTR whatever
149.144.51.202.63.in-addr.arpa.  PTR whatever
150.144.51.202.63.in-addr.arpa.  PTR whatever
151.144.51.202.63.in-addr.arpa.  PTR whatever
152.144.51.202.63.in-addr.arpa.  PTR whatever
153.144.51.202.63.in-addr.arpa.  PTR whatever
154.144.51.202.63.in-addr.arpa.  PTR whatever
155.144.51.202.63.in-addr.arpa.  PTR whatever
156.144.51.202.63.in-addr.arpa.  PTR whatever
157.144.51.202.63.in-addr.arpa.  PTR whatever
158.144.51.202.63.in-addr.arpa.  PTR whatever
159.144.51.202.63.in-addr.arpa.  PTR whatever
160.144.51.202.63.in-addr.arpa.  PTR whatever
161.144.51.202.63.in-addr.arpa.  PTR whatever
162.144.51.202.63.in-addr.arpa.  PTR whatever
163.144.51.202.63.in-addr.arpa.  PTR whatever

or whatever your specific  /28 range is.

The Class C is delegated here:

# dig -x 63.202.51.0 ns

; <<>> DiG 9.2.3rc3 <<>> -x 63.202.51.0 ns
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 49983
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;0.51.202.63.in-addr.arpa.      IN      NS

;; AUTHORITY SECTION: 51.202.63.in-addr.arpa. 3600 IN SOA ns1.pbi.net. postmaster.pbi.net. 200310210 3600 900 604800 3600

Len


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RE: [IMail Forum] Classless Delegation

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