[16] in Hesiod
problem with hesiod server
daemon@ATHENA.MIT.EDU (Tim Garlick -- UCSC Computer Center)
Wed Apr 26 18:53:27 1989
Date: Wed, 26 Apr 89 15:33:44 -0700
From: garlick@ucsco.UCSC.EDU (Tim Garlick -- UCSC Computer Center)
To: hesiod@ATHENA.MIT.EDU
To all the hesiod gurus out there:
I am trying to install hesiod into our nameserver. I have gotten it
to almost work. The environment is such that "ucscc" (or just "c")
is the primary nameserver for IN addresses. I set it up so that it is
also the primary name server for the HS class. Here is its named.boot:
;
; @(#)named.boot.master 1.14 (UCSC) 87/07/30
;
; boot file for authoritative name server
; Note that there should be one primary entry for each SOA record.
;
sortlist 128.32.0.0 128.45.0.0 128.3.0.0 36.0.0.0 128.102.0.0 10.0.0.0 31.0.0.0
directory /etc/namedb
; type domain source file, or host and backup file
primary UCSC.EDU ucschosts
cache . root.cache
primary HESIOD ucschesiod
primary 114.128.IN-ADDR.ARPA ucschosts.rev
primary 0.0.127.IN-ADDR.ARPA localhost.rev
Here is the ucschesiod file on ucscc:
; Simulate authoritative data for UCSC.EDU, class HS.
;
@ HS SOA UCSCC.UCSC.EDU. HAYNES@UCSC.EDU (
4.8 ; serial - database version number
1800 ; refresh - sec servers
300 ; retry - for refresh
3600 ; expire - unrefreshed data
7200 ) ; min
HS NS UCSCC.UCSC.EDU.
;
;
root.uid HS TXT root:0 ;sample HS record
Everything works fine on the server, ucscc. Hesinfo and nslookup
return all the correct information. So then I tried to add it
to another machine. This machine, ucsch, was a secondary server,
but I turned it into a caching only nameserver, thinking that might
help. Here is ucsch's named.boot:
;
; @(#)named.boot.slave 1.13 (UCSC) 87/08/05
;
; boot file for secondary name server
; Note that there should be one primary entry for each SOA record.
;
;
sortlist 128.32.0.0 128.45.0.0 128.3.0.0 36.0.0.0 128.102.0.0 10.0.0.0
directory /etc/namedb
; type domain source host/file backup file
cache . root.cache
primary HESIOD ucschesiod
The file, ucschesiod is different on the client machine and the server.
I used the one from the distribution, modified for our machines:
; Simulate authoritative data for ATHENA.MIT.EDU, class HS, and delegate
; name service NS.ATHENA.MIT.EDU.
;
@ HS SOA UCSCC.UCSC.EDU. (
4.8 ; serial - database version number
1800 ; refresh - sec servers
300 ; retry - for refresh
3600 ; expire - unrefreshed data
7200 ) ; min
HS NS UCSCC.UCSC.EDU.
; pointers to Hesiod name servers
HESIOD. 99999999 HS NS UCSCC.UCSC.EDU.
;NS.ATHENA.MIT.EDU. 99999999 HS NS APOLLO.MIT.EDU.
;NS.ATHENA.MIT.EDU. 99999999 HS NS CLIO.MIT.EDU.
; Hesiod address records (simply duplicates of IN address records)
UCSCC.UCSC.EDU. 99999999 HS A 128.114.129.1
;CLIO.MIT.EDU. 99999999 HS A 18.63.0.7
;APOLLO.MIT.EDU. 99999999 HS A 18.80.0.10
; Internet address records for the same Hesiod servers
; required because of implementations of gethostbyname() which use
; C_ANY/T_A queries.
;CLIO.MIT.EDU. 99999999 IN A 18.63.0.7
UCSCC.UCSC.EDU. 99999999 IN A 128.114.129.1
;APOLLO.MIT.EDU. 99999999 IN A 18.80.0.10
So here's the problem: The client cannot resolve the CNAME for the server.
It works the first time, but each subsequent call to the nameserver returns
only the CNAME, not the A RR. All other addresses, both local and distant,
resolve just fine. Here is a script demonstrating this:
# kill `cat /etc/named.pid`;/etc/named
# hesinfo -bl root uid
hes_to_bind(root, uid) expands to
root.uid.hesiod.
which resolves to
root:0
# nslookup c [c (an alias for ucscc) is the primary nameserver]
Server: ucsch.UCSC.EDU
Address: 0.0.0.0
Name: ucscc.UCSC.EDU
Address: 128.114.129.1
Aliases: c.UCSC.EDU
# !!
nslookup c
*** ucsch.UCSC.EDU can't find c: Server failed
Server: ucsch.UCSC.EDU
Address: 0.0.0.0
# !!
nslookup c
*** ucsch.UCSC.EDU can't find c: Server failed
Server: ucsch.UCSC.EDU
Address: 0.0.0.0
# nslookup ucscc
Server: ucsch.UCSC.EDU
Address: 0.0.0.0
Name: ucscc.UCSC.EDU
Address: 128.114.129.1
[ucschosts is the primary file for the server.]
# rsh ucscc head -23 /etc/namedb/ucschosts
;
; @(#)ucschosts 1.81 (UCSC) 89/4/24
;
@ IN SOA ucscc.UCSC.EDU. haynes.ucscc.UCSC.EDU. (
1.81 ; serial
10800 ; refresh
600 ; retry
3600000 ; expire
86400 ) ; minimum
IN NS ucscc.UCSC.EDU.
IN NS flatte.UCSC.EDU.
localhost IN A 127.1
loghost IN CNAME localhost
ucscc IN A 128.114.129.1
IN HINFO vax-11/780 unix
c IN CNAME ucscc
[nslookup in debug mode:]
*** ucsch.UCSC.EDU can't find c: Server failed
Default Server: ucsch.UCSC.EDU
Address: 0.0.0.0
> c
Server: ucsch.UCSC.EDU
Address: 0.0.0.0
------------
Got answer:
HEADER:
opcode = QUERY, id = 1, rcode = SERVFAIL
header flags: response, want recursion, recursion avail.
questions = 1, answers = 1, auth. records = 0, additional = 0
QUESTIONS:
c.UCSC.EDU, type = A, class = IN
ANSWERS:
-> c.UCSC.EDU canonical name = ucscc.UCSC.EDU
------------
Failed: SERVFAIL, num. answers = 1, ns = 0, additional = 0
script done on Wed Apr 26 14:06:15 1989
I'm at a loss. I've tried a bunch of different combinations, setting up
ucsch as both a primary and a secondary HS server (didn't work at all).
I got roughly the same results when ucsch was a secondary IN server.
Originally I had set up the hesiod domain to be hes.ucsc.edu, but changed
it to just "hesiod" thinking that might help. It didn't.
I know this is long (and who wants to wade through someone else's problem),
but I'd appreciate any help, as I'm kind of stuck for new ideas. If you
need more information, just write- I'd be happy to oblige. Thanks!
-Tim Garlick.
garlick@ucsco.ucsc.edu
