jester121
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| reply to robl27
Re: OpeNDNS
Level 3 mentioned in passing (about the time the details on the cache poisoning proof of concept came out) that they would eventually be shutting off public access to their beloved and ubiquitous 4.2.2.x DNS servers.
That will be a very interesting day in the IT field, when we learn who's sloppy and who's not. |
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kieranmullen
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| Is it considered sloppy to put clients on OpenDNS rather than their ISP's dns? I mean OpenDNS has so many other nice options as far as filtering goes as well and the ads are not a big turnoff.
said by jester121  :Level 3 mentioned in passing (about the time the details on the cache poisoning proof of concept came out) that they would eventually be shutting off public access to their beloved and ubiquitous 4.2.2.x DNS servers. That will be a very interesting day in the IT field, when we learn who's sloppy and who's not. |
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backfeed
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| reply to jester121
I am using Open DNS now on my networks, I have used Level 3's in a pinch, but I always thought that it was wrong to use them as a standard. They do work good, but I am really surprised that they have left them open to the public for so long...
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jester121
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| reply to kieranmullen
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... |
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kieranmullen
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2 edits | said by jester121 :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. |
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NetFixer
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3 edits | said by kieranmullen :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.
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History does not long entrust the care of freedom to the weak or the timid.
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Test your firewall.
Smell the flowers. |
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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 |
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NetFixer
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1 edit | said by kieranmullen :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. |
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kieranmullen
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| I believe the above lends some information on the intermixing...
said by NetFixer :said by kieranmullen :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. |
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NetFixer
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| said by kieranmullen :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. |
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NetAdmin
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join:2008-05-22
| reply to jester121
said by jester121 :That will be a very interesting day in the IT field, when we learn who's sloppy and who's not. Or who can remember their ISPs DNS servers. 4.2.2.2 was such a great server because it was so easy to use during an initial setup when you didn't have easy access to your ISPs DNS addresses or just plain forgot the DNS server address.
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NetFixer
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1 edit | said by NetAdmin :said by jester121 :That will be a very interesting day in the IT field, when we learn who's sloppy and who's not. Or who can remember their ISPs DNS servers. 4.2.2.2 was such a great server because it was so easy to use during an initial setup when you didn't have easy access to your ISPs DNS addresses or just plain forgot the DNS server address. I think the "interesting day" and "sloppy" references are about the unknown thousands of PCs currently using the 4.2.2.x DNS servers because some tech did a quick fix 5 years ago and now nobody even remembers that it had been done.
The downtime and ISP and IT department headaches that will result on the day those DNS servers become restricted to authorized users could rival the problems caused by Blaster and Welchia.
--
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 : 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:
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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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