[Dnsmasq-discuss] dnsmasq: routing non /24 reverse in-addr.arpa requests

[Alessandro Bottonelli]

Il 2016-08-28 11:53 Albert ARIBAUD ha scritto:
> Hi Alessandro,
> 
> Le Sun, 28 Aug 2016 11:33:02 +0200
> Alessandro Bottonelli <alessandro at bottonelli.it> a écrit:
> 
> Here's the current /etc/dnsmasq.conf content (I added the line
> numbers):
> 
> -----
> 1.  # routing PTR queries to nameservers:
> 2.  server=/50.150.10.in-addr.arpa/10.150.50.17
> 3.  server=/51.150.10.in-addr.arpa/10.150.50.17
> 4.  server=/52.150.10.in-addr.arpa/10.150.50.17
> 5.  server=/53.150.10.in-addr.arpa/10.150.50.17
> 6.  server=/54.150.10.in-addr.arpa/10.150.50.17
> 7.  server=/156.240.10.in-addr.arpa/10.150.50.17
> 8.  server=/157.240.10.in-addr.arpa/10.150.50.17
> 9.  server=/158.240.10.in-addr.arpa/10.150.50.17
> 10. server=/129.240.10.in-addr.arpa/10.240.129.113
> 11. # anything else not defined above (strict-order is set)
> 11. server=/10.in-addr.arpa/10.159.59.41
> ----
> 
> The issue is with line 7, actually 10.240.156.x IS NOT a /24 net. I
> tried different syntax forms, I searched, but could not find a way to
> tell dnsmasq about that.
> 
> [10.240.156.x looks like a /24 (sub)net to me, what with three bytes 
> out
> of four being constant. Do you mean the third byte may be something
> else than 156? Or is x being restricted to less than whole 0..255
> range?]
> 

The latter you wrote. My line 7 is wrong I know, but I don't know how to 
write it differently.
I can rev 10.240.156.6 by asking 10.150.50.17. But 10.240.156.101 is 
reversed only by 10.159.59.41 (tried with dig -x 10.240.156.101 
@10.159.59.41 and works fine).

And that's my issue, what's the syntax (if available) to tell dnsmasq to 
ask for reverse for less than 0.255 range? Say ask 10.240.156.[0-63] 
revs to 10.150.50.17 and ask 10.240.156.[64-255] revs to 10.159.59.41.

And/Or, as previously asked, is there a way to tell dnsmasq to ignore 
NXDOMAIN coming from one server (say 10.150.50.17) and keep asking the 
others (till the and of the server list)?

Thanks,

-- 
Alessandro