Re: Reverse address entries

[Sam Wilson]

In article ,
 "Novosielski, Ryan"  wrote:

> Came across another instance where [reverse lookups] may matter: TCP Wrappers.
> Although the case there was a bit more peculiar -- rr.net does not
> appear to have FORWARD DNS for at least some of its dynamic address
> space. So you can get a PTR, and then address validation fails on the
> forward address. I guess perhaps if you had no PTR it would never go
> that far.

Yep, when you have PTRs they should agree with the A records or paranoid 
reverse lookup will fail.  That should still be fairly quick, though, 
since there should be NXDOMAIN responses to the forward lookups rather 
than timeouts.

Sam

-- 
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.
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RE: Slave not creating/updating zones

[Grace Ingabire]

Dear Niall,

We are working on this!

Thanks

 Best Regards,
Grace INGABIRE
ccTLD SYSTEM ADMINISTRATOR
RICTA 
CELL:+250788424148




-Original Message-
From: Niall O'Reilly [mailto:niall.orei...@ucd.ie] 
Sent: Monday, July 15, 2013 5:47 PM
To: Grace Ingabire
Cc: Bind Users
Subject: Re: Slave not creating/updating zones


On 15 Jul 2013, at 12:49, Grace Ingabire wrote:

> The issue is now resolved, my master was not configured properly!

There's something else: LTD.RW seems not to be delegated.

The problem seems to be masked from you because this zone 
and its parent are both hosted on ns{1,2}.ricta.org.rw.

From further away, a query for NS records for LTD.RW
sometimes returns a list of NS records, sometimes NXDOMAIN,
according to which of the parent zone (RW) name servers
is queried for the delegation (zone-cut) records, as shown
below.

I expect you'll need to add NS records for LTD in the RW
zone file.

dhcp-c101a88b(niall)8: dig +trace ltd.rw ns

; <<>> DiG 9.6-ESV-R4-P3 <<>> +trace ltd.rw ns ;; global options: +cmd
.   232678  IN  NS  e.root-servers.net.
.   232678  IN  NS  k.root-servers.net.
.   232678  IN  NS  f.root-servers.net.
.   232678  IN  NS  a.root-servers.net.
.   232678  IN  NS  m.root-servers.net.
.   232678  IN  NS  g.root-servers.net.
.   232678  IN  NS  j.root-servers.net.
.   232678  IN  NS  h.root-servers.net.
.   232678  IN  NS  d.root-servers.net.
.   232678  IN  NS  i.root-servers.net.
.   232678  IN  NS  l.root-servers.net.
.   232678  IN  NS  b.root-servers.net.
.   232678  IN  NS  c.root-servers.net.
;; Received 512 bytes from 137.43.116.19#53(137.43.116.19) in 7 ms

rw. 172800  IN  NS  ns1.ricta.org.rw.
rw. 172800  IN  NS  fork.sth.dnsnode.net.
rw. 172800  IN  NS  sns-pb.isc.org.
rw. 172800  IN  NS  ns-rw.afrinic.net.
;; Received 290 bytes from 2001:dc3::35#53(m.root-servers.net) in 19 ms

rw. 86400   IN  SOA ns1.ricta.org.rw.
info.ricta.org.rw. 2013071545 86400 7200 604800 86400
;; Received 79 bytes from 2001:500:2e::1#53(sns-pb.isc.org) in 35 ms

dhcp-c101a88b(niall)8: dig +trace ltd.rw ns

; <<>> DiG 9.6-ESV-R4-P3 <<>> +trace ltd.rw ns ;; global options: +cmd
.   232677  IN  NS  m.root-servers.net.
.   232677  IN  NS  f.root-servers.net.
.   232677  IN  NS  a.root-servers.net.
.   232677  IN  NS  l.root-servers.net.
.   232677  IN  NS  i.root-servers.net.
.   232677  IN  NS  h.root-servers.net.
.   232677  IN  NS  k.root-servers.net.
.   232677  IN  NS  c.root-servers.net.
.   232677  IN  NS  g.root-servers.net.
.   232677  IN  NS  j.root-servers.net.
.   232677  IN  NS  d.root-servers.net.
.   232677  IN  NS  e.root-servers.net.
.   232677  IN  NS  b.root-servers.net.
;; Received 512 bytes from 137.43.116.19#53(137.43.116.19) in 1 ms

rw. 172800  IN  NS  ns1.ricta.org.rw.
rw. 172800  IN  NS  fork.sth.dnsnode.net.
rw. 172800  IN  NS  ns-rw.afrinic.net.
rw. 172800  IN  NS  sns-pb.isc.org.
;; Received 290 bytes from 2001:500:3::42#53(l.root-servers.net) in 3 ms

ltd.rw. 86400   IN  NS  ns2.ricta.org.rw.
ltd.rw. 86400   IN  NS  ns1.ricta.org.rw.
;; Received 102 bytes from 41.74.173.250#53(ns1.ricta.org.rw) in 202 ms

dhcp-c101a88b(niall)8: 


/Niall


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