Wildcard depth on NAPTR records

[Mark Andrews]

> Hello all.
> 
> I have a unusual problem.  We use DNS for telephone routing.
> I have a dns zone that contains NAPTR records, and have run
> in to the following problem.
> 
> If I query my ns4, I get the proper response.  If I query my
> other server, I get a NXDOMAIN response.  NS4 is the master,
> the other server is a slave.  Replication is working
> properly, and both servers answer properly for other
> queries, in the same zone file.
> 
> I'm querying for 5.5.5.5.5.5.5.5.6.8.1.e164-pstn.isdn.net
> 
> The wildcard entry that should match it in the zone file is
> 
> *.1               IN NAPTR 100 11 "u" "E2U+SIP"
> "!^\\+*(.*)$!sip:\\1 at telco01.isdn.net!".     
> 
> But when I do the following I get different results...  (on
> ns4)
> host -t NAPTR 5.5.5.5.5.5.5.5.6.8.1.e164-pstn.isdn.net 
> 5.5.5.5.5.5.5.5.6.8.1.e164-pstn.isdn.net NAPTR 100 11 "u"
> "E2U+SIP" "!^\\+*(.*)$!sip:\\1 at telco01.isdn.net!" .
> 
> host -t NAPTR 5.5.5.5.5.5.5.5.6.8.1.e164-pstn.isdn.net
> telco07.isdn.net
> Using domain server:
> Name: telco07.isdn.net
> Address: 207.65.69.254#53
> Aliases: 

> Host 5.5.5.5.5.5.5.5.6.8.1.e164-pstn.isdn.net not found:
> 3(NXDOMAIN)

Which is correct. You don't have a *.5.5.5.6.8.1 entry. *.1 is
blocked more specific entries.

*.1.5.5.5.6.8.1         5M IN NAPTR     100 11 "u" "E2U+SIP" "!^\\+*1(.*)$!sip:\\1 at telco08.isdn.net!" .
*.6.5.5.5.6.8.1         5M IN NAPTR     100 11 "u" "E2U+SIP" "!^\\+*1(.*)$!sip:\\1 at telco08.isdn.net!" .
*.8.5.5.5.6.8.1         5M IN NAPTR     100 11 "u" "E2U+SIP" "!^\\+*1(.*)$!sip:\\1 at telco08.isdn.net!" .

> I'm running the following versions.
> [ejay.hire at ns4 ejay.hire]$ rpm -qa bind
> bind-9.2.2.P3-9
> [root at telco07 ~]# rpm -qa bind
> bind-9.3.1-14_FC4
> 
> Anyone see a cause for this?
> 
> Thanks,
> Ejay 
> 
> 
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org