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Forums » 1 In 10 DNS Servers Vulnerable To Cache Poisoning » OpeNDNS
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jester121
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join:2003-08-09
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reply to kieranmullen
Re: OpeNDNS

No clue about that, we run our own internal DNS. The thing is that Level 3's 4.2.2.x servers aren't "officially" open to the public like OpenDNS ones are, they've just been around forever and easy to remember. I use them occasionally for troubleshooting or if I need to go to an ISP website to fix someone's computer...

kieranmullen
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2 edits
said by jester121 See Profile :

No clue about that, we run our own internal DNS. The thing is that Level 3's 4.2.2.x servers aren't "officially" open to the public like OpenDNS ones are, they've just been around forever and easy to remember. I use them occasionally for troubleshooting or if I need to go to an ISP website to fix someone's computer...
They are the servers that are used for Verizon Fios Setup too! I wonder if they have some sort of agreement with them. Simply typing DNS in the help section of Verizon.net did not yield any results except for a dial up dns server.


NetFixer
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3 edits
said by kieranmullen See Profile :

They are the servers that are used for Verizon Fios Setup too! I wonder if they have some sort of agreement with them.
Ask and ye shall receive


The reason that the 4.2.2.x DNS servers are frequently referred to as Level3 servers is that the IP NetRange/CIDR is owned by Level3.

--
History does not long entrust the care of freedom to the weak or the timid.
-- Dwight D. Eisenhower
Test your firewall.
Smell the flowers.

kieranmullen
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1 edit
ask... well I suppose I could have looked it up as well.

Why would level3 have a hold on IP blocks from verizon? You would think that verizon would have many of its own blocks registered.

»www.isp-planet.com/news/2002/lvl···129.html

Level3 bought genuity.com which was the networking GTE I believe. Verizon bought GTE.

Nevermind its a mess that does not benefit me knowing in anyway. I will just assume for the foreseeable future that the Level 3 servers will work with Verizon FIOS


NetFixer
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1 edit
said by kieranmullen See Profile :

Why would level3 have a hold on IP blocks from verizon? You would think that verizon would have many of its own blocks registered.
Why would Microsoft need to use Akamai Technologies servers and IP adresses? The simple answer is that corporations sub contract and sub lease services and properties from other corporations all the time.
--
History does not long entrust the care of freedom to the weak or the timid.
-- Dwight D. Eisenhower
Test your firewall.
Smell the flowers.

kieranmullen
Premium
join:2005-12-12
Portland, OR
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I believe the above lends some information on the intermixing...

said by NetFixer See Profile :

said by kieranmullen See Profile :

Why would level3 have a hold on IP blocks from verizon? You would think that verizon would have many of its own blocks registered.
Why would Microsoft need to use Akamai Technologies servers and IP adresses? The simple answer is that corporations sub contract and sub lease services and properties from other corporations all the time.


NetFixer
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said by kieranmullen See Profile :

I believe the above lends some information on the intermixing...

I believe the term for this type of perpetual post buyout/merger usage is grandfathering.
--
History does not long entrust the care of freedom to the weak or the timid.
-- Dwight D. Eisenhower
Test your firewall.
Smell the flowers.


kontos
xyzzy

join:2001-10-04
West Henrietta, NY

reply to NetFixer
said by kieranmullen See Profile :
I suspect that that is a result of sloppy reverse DNS management on Level3's part.
Verizon (gtei.net) doesn't seep to agree that those hostnames are theirs:

and the servers appear to indicate that they are managed by Level3:


Raphion

join:2000-10-14
Samsara

reply to NetFixer
I have 4.2.2.4-5 as my DNS, but when I go to »entropy.dns-oarc.net/test/ it tells me my server names are:
1. 209.244.5.159 (ics2.Atlanta1.Level3.net)
2. 209.244.7.132 (unknown.Level3.net)
No gtei there. As I understand it, those 4.2.2.x addresses aren't actually server addresses, but rather, requests to those addresses are routed to the nearest available Level3.net DNS servers.
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