Some times an ISP will let you control the PTR records if you have a block of IP addresses. I know that UU Net (now MCI) does that for my 128 addresses. -- Jim Dickenson > From: "L. Christopher Luther" <CLuther@xxxxxxxxxxxxx> > Reply-To: redhat-list@xxxxxxxxxx > Date: Mon, 26 Jan 2004 13:54:50 -0500 > To: "'redhat-list@xxxxxxxxxx'" <redhat-list@xxxxxxxxxx> > Subject: RE: Need help with reverse DNS > > A couple of things: > > 1) The forward DNS lookup records (e.g., host, alias, mx) are typlcally > "owned" by the entity that is authorative over the domain. In this case, > the authority for your domain, mollynet.com, is ZoneEdit.com. > > 2) The reverse DNS lookup records (i.e., ptr) are "owned" by the entity that > is authorative over the IP block in which the host in question resides. In > this case, the authority for your IP address, 66.93.153.62, is > SpeakEasy.net. > > 3) Reverse DNS records point to specific hosts not domains. Therefore, of > your IP host is called "mailman.mollynet.com" then the PTR record would look > like this: > > 62.153.93.66.in-addr.arpa. 1H IN PTR mailman.mollynet.com > > And yes, SpeakEasy.net would be the organization you would need to contact > to arrange a PTR change, but no, you would not need to move the DNS from > ZoneEdit.com to SpeakEasy.net. We use ServerVault.com to host our DNS but > UU.net is our actual ISP and it is they who have setup PTR records for our > mail servers. > > > HTH, > > - Christopher > > > > -----Original Message----- > From: Frank Reichenbacher [mailto:frank@xxxxxxxxxxx] > Sent: Saturday, January 24, 2004 10:26 PM > To: redhat-list@xxxxxxxxxx > Subject: Need help with reverse DNS > > > I run a small private email list on qmail/ezmlm-idx off my RH 7.0 > machine on a DSL connection from my home. It's been running well for two > or three years now and earning its keep. Lately though, I noticed that > the aol.com address are bouncing. The bounce message indicates that > aol.com has blacklisted my server because of complaints about > unsolicited bulk email. Well, strictly speaking this is impossible. I > examine the logs and messages to postmaster frequntly, and I can see > that my server is not being used by me or anyone else for mass > unsolicited emails. > > I called aol.com and got the ball rolling to unblock me and establish a > feedback loop, but in the meantime, I think I had better establish a > reverse DNS zone for the server, just in case that had a part in the > complaints. My problem is that I've got to be very careful about this > since I cannot afford any down time if I screw it up. > > Before getting into it, though, I must admit that DNS has been a very > hard subject for me to understand. It's also been quite a while since I > set all this up and I'm getting a little hazy about the whole process. > > I have DNS handled by ZoneEdit.com: > Domain: mollynet.com, 66.93.153.62 > My ISP is Speakeasy.net. > > named.conf > ; > ; a caching only nameserver config > ; > directory /var/named > cache . named.ca > primary 0.0.127.in-addr.arpa named.local > > dig-x 66.93.153.62 > ; <<>> DiG 8.3 <<>> -x > ;; res options: init recurs defnam dnsrch > ;; got answer: > ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 4 > ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 > ;; QUERY SECTION: > ;; 1.1.168.192.in-addr.arpa, type = ANY, class = IN > > ;; ANSWER SECTION: > 62.153.93.66.in-addr.arpa. 1H IN PTR > dsl093-153-062.phx1.dsl.speakeasy.net > > nslookup -type=SOA mollynet.com > > Server: dsl231-041-022.sea1.dsl.speakeasy.net > Address: 216.231.41.22 > > Non-authoritative answer: > mollynet.com > origin = ns3.zoneedit.com > mail addr = dnsadmin.zoneedit.com > serial = 980910580 > refresh = 14400 (4H) > retry = 7200 (2H) > expire = 864000 (1w3d) > minimum ttl = 7200 (2H) > > Okay now, this pointer record is my problem, right? > 62.153.93.66.in-addr.arpa. 1H IN PTR > dsl093-153-062.phx1.dsl.speakeasy.net > > If I tell Speakeasy.net to change that to: > 62.153.93.66.in-addr.arpa. 1H IN PTR mollynet.com > > it will solve my problem. Right? Isn't that what is meant by reverse > DNS? > > If I do this, can I still have ZoneEdit.com handle DNS for me? Or do I > then need to switch DNS to Speakeasy.net? This is important to me, > because ZoneEdit is free, while Speakeasy.net is not. > > Here's another part of the problem. > > nslookup -type=SOA 66.93.153.62 > > *** No start of authority (SOA) records available for 66.93.153.62 > > Where does the SOA for my IP address come from? I do not understand how > there isn't SOA. > > Any suggestions will be appreciated. > > Frank > > > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
