DNS weirdness
JF Mezei
Tonight, I tried to debug it. I was able to NSLOOKUP 204.92.14.182 but
not .223
This is my own caching BIND server.
And low and behold, later tonight, the 223 now works. (the is the fido
SMTP server that sends mail coming from GPRS handsets, so being able to
reverse translate that IP is important).
To make matters worse, while it wasn't working when querying via my own
server, sending the query to Teksavvy's DNS server worked.
This is not the first time I am having problems with that specific IP
address. This happened too a few montsh ago, resolved again a day or two
later without my making any changes.
Does anyone have any explations on this ?
Is it possible that one of the rogers DNS servers is poorly configured
and when it is its turn to serve, it fails ?
I tried to do a
DIG @ns1.rogers.com 15.92.204.in-addr.arpa axfr
to try to download the reverse lookup zone file for that IP block, but
it didn't work. ( I can get the fido.ca zone file though). is the above
command the right syntax to obtain a reverse translation ?
If a server gives me the right to view the zone file for one zone
(fido.ca) shouldn't it also give me access to another zone file for
which it is responsible (the in-addr.arpa ones) ?
Geoffrey Welsh
> Does anyone have any explations on this ?
There appears to be a break in the chain of DNS delegation, specifically
ns2.uunet.ca:
>nslookup
Default Server: [x]
Address: [x]
> set nodefname
> set nosearch
> set retry=1
> set timeout=10
> set type=any
> lserver a.root-servers.net
Default Server: a.root-servers.net
Address: 198.41.0.4
> 223.15.92.204.in-addr.arpa
Server: a.root-servers.net
Address: 198.41.0.4
204.in-addr.arpa nameserver = chia.ARIN.NET
204.in-addr.arpa nameserver = dill.ARIN.NET
204.in-addr.arpa nameserver = BASIL.ARIN.NET
204.in-addr.arpa nameserver = henna.ARIN.NET
204.in-addr.arpa nameserver = indigo.ARIN.NET
204.in-addr.arpa nameserver = epazote.ARIN.NET
204.in-addr.arpa nameserver = figwort.ARIN.NET
> lserver henna.arin.net
Default Server: henna.arin.net
Address: 192.26.92.32
> 223.15.92.204.in-addr.arpa
Server: henna.arin.net
Address: 192.26.92.32
92.204.in-addr.arpa nameserver = auth01.ns.uu.net
92.204.in-addr.arpa nameserver = ns.uunet.ca
92.204.in-addr.arpa nameserver = ns2.uunet.ca
> lserver ns2.uunet.ca
Default Server: ns2.uunet.ca
Address: 142.77.1.5
> 223.15.92.204.in-addr.arpa
Server: ns2.uunet.ca
Address: 142.77.1.5
DNS request timed out.
timeout was 10 seconds.
*** Request to ns2.uunet.ca timed-out
> lserver ns.uunet.ca
Default Server: ns.uunet.ca
Address: 142.77.1.1
> 223.15.92.204.in-addr.arpa
Server: ns.uunet.ca
Address: 142.77.1.1
223.15.92.204.in-addr.arpa name = aegis.fido.ca
15.92.204.in-addr.arpa nameserver = ns9.rogers.com
15.92.204.in-addr.arpa nameserver = ns1.rogers.com
15.92.204.in-addr.arpa nameserver = ns2.net.rss.rogers.com
ns1.rogers.com internet address = 142.146.39.30
ns2.net.rss.rogers.com internet address = 142.146.42.30
ns9.rogers.com internet address = 142.146.39.31
> lserver auth01.ns.uu.net
Default Server: auth01.ns.uu.net
Address: 198.6.1.81
> 223.15.92.204.in-addr.arpa
Server: auth01.ns.uu.net
Address: 198.6.1.81
15.92.204.in-addr.arpa nameserver = dns1.fido.ca
15.92.204.in-addr.arpa nameserver = dns2.fido.ca
> lserver dns1.fido.ca
Default Server: dns1.fido.ca
Address: 204.92.15.181
> 223.15.92.204.in-addr.arpa
Server: dns1.fido.ca
Address: 204.92.15.181
223.15.92.204.in-addr.arpa name = aegis.fido.ca
15.92.204.in-addr.arpa nameserver = ns1.rogers.com
15.92.204.in-addr.arpa nameserver = ns2.net.rss.rogers.com
15.92.204.in-addr.arpa nameserver = ns9.rogers.com
ns1.rogers.com internet address = 142.146.39.30
ns2.net.rss.rogers.com internet address = 142.146.42.30
ns9.rogers.com internet address = 142.146.39.31
>
--
Geoffrey Welsh <Geoffrey [dot] Welsh [at] bigfoot [dot] com>
JF Mezei
> There appears to be a break in the chain of DNS delegation, specifically
> ns2.uunet.ca:
Thanks. I'll have to carefully study your nslookup listing to understand
it all.