Two nameservers, but data not being shared
tsreyb_at_yahoo.com
Date: 05/15/05
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Date: 14 May 2005 23:14:36 -0700
I'm not sure of the proper terminology, so my description of this
problem may be off-base a bit. I'll try my best :)
I have two name servers, A and B. Nameserver B is the master for a
particular zone (subset of A's zone) and is supposed to feed its
results to nameserver A. The domain of A is 'MAIHAG.com' and the domain
for which B is a master is 'ite.MAIHAG.com'.
Computers pointing to B as their primary DNS server are able to
successfully resolve all hostnames within that zone.
However, computers using A as a nameserver are not able to resolve
anything from B's zone. Why?
NOTE: A's own IP is 192.168.254.251
NOTE: B's own IP is 10.1.245.251
The relevant zone section from A's named.conf pointing to B is:
zone "ite.MAIHAG.com" {
type slave;
file "stub.ite.MAIHAG.com";
masters { 10.1.245.251; };
zone-statistics yes;
};
And the entire named.conf from B is:
options {
directory "/var/named";
forwarders{
192.168.254.251;
};
};
zone "." {
type hint;
file "named.ca";
};
zone "ite.MAIHAG.com"{
type master;
file "db.ite.MAIHAG.com";
notify yes;
allow-transfer { 10.99.10.20; 10.99.10.21; 192.168.254.251; };
};
zone "qaMAIHAG.com"{
type master;
file "db.qaMAIHAG.com";
};
zone "0.0.127.in-addr.arpa"{
type master;
file "named.local";
};
zone "1.10.in-addr.arpa"{
type master;
file "db.10.1";
notify yes;
};
zone "2.10.in-addr.arpa"{
type master;
file "db.10.2";
};
zone "1.222.in-addr.arpa"{
type master;
file "db.222.1";
};
zone "4.10.in-addr.arpa"{
type master;
file "db.10.4";
};
Now, using nslookup with debug enabled and pointing to server A, I get
the following result:
> set debug
> scmbag.ite.MAIHAG.com
Server: turtle.eng.MAIHAG.com
Address: 192.168.254.251
;; res_mkquery(0, scmbag.ite.MAIHAG.com, 1, 1)
------------
Got answer:
HEADER:
opcode = QUERY, id = 45136, rcode = SERVFAIL
header flags: response, want recursion, recursion avail.
questions = 1, answers = 0, authority records = 0,
additional = 0
QUESTIONS:
scmbag.ite.MAIHAG.com, type = A, class = IN
------------
;; res_mkquery(0, scmbag.ite.MAIHAG.com.eng.MAIHAG.com, 1, 1)
------------
Got answer:
HEADER:
opcode = QUERY, id = 45137, rcode = NXDOMAIN
header flags: response, auth. answer, want recursion,
recursion avail.
questions = 1, answers = 0, authority records = 1,
additional = 0
QUESTIONS:
scmbag.ite.MAIHAG.com.eng.MAIHAG.com, type = A, class = IN
AUTHORITY RECORDS:
-> eng.MAIHAG.com
ttl = 86400 (1D)
origin = turtle.eng.MAIHAG.com
mail addr = maihag.eng.MAIHAG.com
serial = 2005051359
refresh = 10800 (3H)
retry = 3600 (1H)
expire = 604800 (1W)
minimum ttl = 86400 (1D)
------------
;; res_mkquery(0, scmbag.ite.MAIHAG.com.MAIHAG.com, 1, 1)
------------
Got answer:
HEADER:
opcode = QUERY, id = 45138, rcode = NXDOMAIN
header flags: response, auth. answer, want recursion,
recursion avail.
questions = 1, answers = 0, authority records = 1,
additional = 0
QUESTIONS:
scmbag.ite.MAIHAG.com.MAIHAG.com, type = A, class = IN
AUTHORITY RECORDS:
-> MAIHAG.com
ttl = 3600 (1H)
origin = hqdc01.MAIHAG.com
mail addr = dns.MAIHAG.com
serial = 2821265003
refresh = 3600 (1H)
retry = 600 (10M)
expire = 86400 (1D)
minimum ttl = 3600 (1H)
------------
;; res_mkquery(0, scmbag.ite.MAIHAG.com.ite.MAIHAG.com, 1, 1)
------------
Got answer:
HEADER:
opcode = QUERY, id = 45139, rcode = SERVFAIL
header flags: response, want recursion, recursion avail.
questions = 1, answers = 0, authority records = 0,
additional = 0
QUESTIONS:
scmbag.ite.MAIHAG.com.ite.MAIHAG.com, type = A, class = IN
------------
*** turtle.eng.MAIHAG.com can't find scmbag.ite.MAIHAG.com: Server
failed
Thanks,
-Bob
Andover, MA
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