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Reverse DNS look up error loop?

Posted on 2007-03-28
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Last Modified: 2008-02-01
For some reason when I do a reverse DNS look up on DNSstuff.com, I get an error saying "It looks like you've stuck me in a loop."  

How can I fix it?  I have called our ISP to set it up and they said it has  been done.
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Question by:ITcrowd
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Expert Comment

by:Chris Dent
ID: 18812037

It depends what's wrong.

The message implies that you never get anything more than referrals to other DNS servers when trying to get the answer.

Are you willing to post the IP so we can try it out?

Chris
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Author Comment

by:ITcrowd
ID: 18812257
sure I trust you guyz,  the IP is 69.4.191.155.
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Chris Dent earned 250 total points
ID: 18812338

Ohh yeah that's quite nasty.

The problem is quite a long way up the chain, either the delegation for the IP range is wrong on the ARIN servers, or Level3.net are missing the zone.

Your ISP will have to pass it up the chain for you which is helpful. I suspect your ISP probably have done what they needed to, I would be very very surprised if you were being served by level3 directly, so the problem will be a tier or two up from your ISP.

You can try contacting the NOC (Network Operations Centre) for Level 3 directly, but I'm not too sure that'll be an easy thing to do.

Chris
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Expert Comment

by:Chris Dent
ID: 18812353

Oh and make sure that when you contact your ISP that you make clear it's looping between ARIN and Level3.net, perhaps give them a copy of your output from dnsstuff:


Asking e.root-servers.net for 155.191.4.69.in-addr.arpa PTR record:  
       e.root-servers.net says to go to indigo.arin.net. (zone: 69.in-addr.arpa.)
Asking indigo.arin.net. for 155.191.4.69.in-addr.arpa PTR record:  
       indigo.arin.net [192.31.80.32] says to go to ns1.level3.net. (zone: 191.4.69.in-addr.arpa.)
Asking ns1.level3.net. for 155.191.4.69.in-addr.arpa PTR record:  
       ns1.level3.net [209.244.0.1] says to go to K.ROOT-SERVERS.NET. (zone: (root))
Asking K.ROOT-SERVERS.NET. for 155.191.4.69.in-addr.arpa PTR record:  
       k.root-servers.net [193.0.14.129] says to go to indigo.arin.net. (zone: 69.in-addr.arpa.)
Asking indigo.arin.net. for 155.191.4.69.in-addr.arpa PTR record:  
       indigo.arin.net [192.31.80.32] says to go to ns2.level3.net. (zone: 191.4.69.in-addr.arpa.)
Asking ns2.level3.net. for 155.191.4.69.in-addr.arpa PTR record:  
       ns2.level3.net [209.244.0.2] says to go to M.ROOT-SERVERS.NET. (zone: (root))
Asking M.ROOT-SERVERS.NET. for 155.191.4.69.in-addr.arpa PTR record:  
       m.root-servers.net [202.12.27.33] says to go to figwort.ARIN.NET. (zone: 69.in-addr.arpa.)
Asking figwort.ARIN.NET. for 155.191.4.69.in-addr.arpa PTR record:  
       figwort.arin.net [192.42.93.32] says to go to ns1.level3.net. (zone: 191.4.69.in-addr.arpa.)
Asking ns1.level3.net. for 155.191.4.69.in-addr.arpa PTR record:  
       ns1.level3.net [209.244.0.1] says to go to D.ROOT-SERVERS.NET. (zone: (root))
Asking D.ROOT-SERVERS.NET. for 155.191.4.69.in-addr.arpa PTR record:  
       d.root-servers.net [128.8.10.90] says to go to epazote.ARIN.NET. (zone: 69.in-addr.arpa.)
Asking epazote.ARIN.NET. for 155.191.4.69.in-addr.arpa PTR record:  
       epazote.arin.net [192.41.162.32] says to go to ns2.level3.net. (zone: 191.4.69.in-addr.arpa.)
Asking ns2.level3.net. for 155.191.4.69.in-addr.arpa PTR record:  
       ns2.level3.net [209.244.0.2] says to go to L.ROOT-SERVERS.NET. (zone: (root))
Asking L.ROOT-SERVERS.NET. for 155.191.4.69.in-addr.arpa PTR record:  
       l.root-servers.net [198.32.64.12] says to go to indigo.arin.net. (zone: 69.in-addr.arpa.)
Asking indigo.arin.net. for 155.191.4.69.in-addr.arpa PTR record:  
       indigo.arin.net [192.31.80.32] says to go to ns1.level3.net. (zone: 191.4.69.in-addr.arpa.)
Asking ns1.level3.net. for 155.191.4.69.in-addr.arpa PTR record:  
       ns1.level3.net [209.244.0.1] says to go to M.ROOT-SERVERS.NET. (zone: (root))
Asking M.ROOT-SERVERS.NET. for 155.191.4.69.in-addr.arpa PTR record:  
       m.root-servers.net [202.12.27.33] says to go to henna.ARIN.NET. (zone: 69.in-addr.arpa.)
Asking henna.ARIN.NET. for 155.191.4.69.in-addr.arpa PTR record:  
       henna.arin.net [192.26.92.32] says to go to ns2.level3.net. (zone: 191.4.69.in-addr.arpa.)
Asking ns2.level3.net. for 155.191.4.69.in-addr.arpa PTR record:  
       ns2.level3.net [209.244.0.2] says to go to B.ROOT-SERVERS.NET. (zone: (root))
Asking B.ROOT-SERVERS.NET. for 155.191.4.69.in-addr.arpa PTR record:  
       b.root-servers.net [192.228.79.201] says to go to epazote.ARIN.NET. (zone: 69.in-addr.arpa.)
Asking epazote.ARIN.NET. for 155.191.4.69.in-addr.arpa PTR record:  
       epazote.arin.net [192.41.162.32] says to go to ns1.level3.net. (zone: 191.4.69.in-addr.arpa.)
Asking ns1.level3.net. for 155.191.4.69.in-addr.arpa PTR record:  
       ns1.level3.net [209.244.0.1] says to go to B.ROOT-SERVERS.NET. (zone: (root))

Error: It looks like you've stuck me in a loop!.


Chris
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Author Comment

by:ITcrowd
ID: 18812656
Wow, is it really that complicated?  My ISP says there''s nothing we can do but wait.  I'm just making efforts to speed up the process.  I've been calling them twice, everyday to get an update, but nothing has changed for the past whole week when I called in the request for the reverse DNS
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Expert Comment

by:Chris Dent
ID: 18814250

Helpful of them, it's entirely possible that something is being setup, but I'm not convinced, they're just not that slow.

Unless they have definate grounds for doing it differently, as far as I can see it should be raised with your ISP's ISP. Doesn't leave you in a very helpful position though.

Chris
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Author Comment

by:ITcrowd
ID: 18820015
OK it looks like they finally fixed it.  But I still can't email AOL.  

I did a test email to ipconfirm@postmaster.aol.com and I got a

"Your connecting IP is: 69.4.191.154" This is our Firewall IP

How can I get my exchange server to connect with  69.4.191.155? THis is my Exchange external IP

Please help
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Expert Comment

by:Chris Dent
ID: 18820031

That's down to your Firewall, afraid I can't help too much with that aspect I'm afraid.

I believe you need to configure it so it translates the internal IP of the Exchange to the Public IP and sends out traffic with that as a source. Basically, NAT in the other direction (outbound as well as inbound).

Chris
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Author Comment

by:ITcrowd
ID: 18820224
Thanks for your help Chris!  Yah it was a setting on my Firewall that I forgot to configure.

Im just happy I that the Reverse DNS is working now!
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Expert Comment

by:Chris Dent
ID: 18820386

Great stuff :)

Chris
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