In message <bed324186eba4d68a4fbf4513747e...@mxph4chrw.fgremc.it>, "Darcy Kevin (FCA)" writes: > I think the ISP may have done something untoward with > 87.233.202.162.in-addr.arpa, since I'm > getting a NODATA response for that name, from the 233.202.162.in-addr.arpa > zone, most probabl > y because it's an empty non-terminal. But what would be under that, and why?
They just haven't put in a CNAME for the broadcast address. ; <<>> DiG 9.12.0-pre-alpha+hotspot+add-prefetch+marka <<>> 87.233.202.162.in-addr.arpa ptr ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 57508 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ; COOKIE: ca17d311c21b67e97ff0dfc358829ec97d7d5f968d33a429 (good) ;; QUESTION SECTION: ;87.233.202.162.in-addr.arpa. IN PTR ;; AUTHORITY SECTION: 233.202.162.in-addr.arpa. 3583 IN SOA ns1.swbell.net. postmaster.swbell.net. 2016061700 10800 900 604800 3600 ;; Query time: 0 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Sat Jan 21 10:35:37 EST 2017 ;; MSG SIZE rcvd: 145 Mark > - Kevin > > > -----Original Message----- > From: bind-users [mailto:bind-users-boun...@lists.isc.org] On Behalf Of Mark > Andrews > Sent: Friday, January 20, 2017 3:55 PM > To: bind-us...@isc.org > Subject: Re: rDNS > > > You have the netblock 162.202.233.80-162.202.233.87 (162.202.233.80/29). > > When software performs a reverse lookup it constructs a DNS name from the > address like 80.233 > .202.162.in-addr.arpa. Now as the netblock is not a full /24 you either have > to create 8 zon > es, one for each PTR record, or provide records at those names which map the > lookups to new n > ames. The later is what has been done here. > The technique is described in RFC 2317. > > ATT has delegated a zone for the first address in the address block to you. > That zone is cal > led 80.233.202.162.in-addr.arpa. It has then added CNAME records to map > lookups for the rest > of the address in your address block into this zone. > > e.g. > > 81.233.202.162.in-addr.arpa. CNAME 81.80.233.202.162.in-addr.arpa. > ... > 86.233.202.162.in-addr.arpa. CNAME 86.80.233.202.162.in-addr.arpa. > > The 80.233.202.162.in-addr.arpa zone should look like this. > > $TTL 1h > @ SOA ns1.archaxis.net. me.archaxis.net. ( > 2017012002 ; Serial > 1h ; Refresh > 1h ; Retry > 4w ; Expire > 1h ) ; Negative cashing TTL > NS ns1.archaxis.net. > NS ns2.archaxis.net. > PTR network.archaxis.net. > 81 PTR alpha.archaxis.net. > 82 PTR bravo.archaxis.net. > 87 PTR broadcast.archaxis.net. > > I increased the expire field to 4 weeks as it was way too small. > Note the reverse for 162.202.233.80 is NOT mapped to a new name so the PTR > record for that ad > dress is at the zone's apex. As all the records had a TTL of 1 hour I set > the default TTL to > that value and removed the per record setting of the TTL. I also removed > the class field as > that is inherited from the zone's declaration. > > Don't forget to bump the zones serial when you install it. > > Once you have the above sorted out and have tested it. You now need to slave > the zone 233.20 > 2.162.in-addr.arpa as that contains the CNAME records. ATT should allow you > to transfer it. > If they don't find a ISP that knows what they are doing. You need a local > copy of the zone > so that when you link goes down you can still do reverse lookups. > > zone "233.202.162.in-addr.arpa" { > type slave; > masters { 151.164.1.1; }; > file "233.202.162.in-addr.arpa"; > }; > > Mark > > In message <20170120162146.ga14...@fantomas.sk>, Matus UHLAR - fantomas > writes: > > On 20.01.17 09:57, Ron Wingfield wrote: > > > I am having difficulty configuring reverse DNS. This has been a > > problem > > > for over a year between my server(s) and my ISP, AT&T. Specifically, I > > > cannot eMail to any recipient that requires rDNS verification, e.g., > > > SBCglobal.net, Comcast.net, or AOL. Very frustrating. > > > > > . . .why shouldnt this point to my server, 162.202.233.81 and not > > > AT&Ts? > > > > because reverse domains are also tracked from the DNS root: > > > > 233.202.162.in-addr.arpa. 7200 IN SOA ns1.swbell.net. > > postmaster.swbell.net. 2016061700 10800 900 604800 3600 > > > > 81.233.202.162.in-addr.arpa. 7200 IN CNAME > > 81.80.233.202.162.in-addr.arpa. > > > > > I have coded my BIND 9 in-addr.arpa zone file as follows: > > > > > > $ORIGIN 233.202.162.in-addr.arpa. > > > > stop defining $ORIGIN in zone file. the $ORIGIN is taken from named "zone" > > statement. > > > > According to those above you have to configure zone > > 80.233.202.162.in-addr.arpa. > > and adk swbell.net to fetchit from you. > > > > > $TTL 3h > > > @ IN SOA ns1.archaxis.net. me.archaxis.net. ( > > > 2017012002 ; Serial > > > 1h ; Refresh > > > 1h ; Retry > > > 1h ; Expire > > > 1h ) ; Negative cashing TTL > > > > > > 3600 IN NS ns1.archaxis.net. > > > 3600 IN NS ns2.archaxis.net. > > > > > > 80 3600 IN PTR network.archaxis.net. > > > 81 3600 IN PTR alpha.archaxis.net. > > > 82 3600 IN PTR bravo.archaxis.net. > > > 87 3600 IN PTR broadcast.archaxis.net. > > > > > > What is wrong? Is this my problem, or with AT&T? > > > > > > > > -- > > Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ > > Warning: I wish NOT to receive e-mail advertising to this address. > > Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. > > Spam is for losers who can't get business any other way. > > _______________________________________________ > > Please visit https://lists.isc.org/mailman/listinfo/bind-users to > > unsubscribe from this list > > > > bind-users mailing list > > bind-users@lists.isc.org > > https://lists.isc.org/mailman/listinfo/bind-users > > -- > Mark Andrews, ISC > 1 Seymour St., Dundas Valley, NSW 2117, Australia > PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org > _______________________________________________ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users > _______________________________________________ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
