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Forums » US Cable Support » Comcast » Comcast HSI » [DNS] Anyone having any DNS issues?
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[NEWS] Comcast Domain Hackers Speak »
« (topic offline) Comcast hacked?  
AuthorAll Replies

NormanS
Premium,MVM
join:2001-02-14
San Jose, CA
·Pacific Bell - SBC

reply to yarrrrr
Re: [DNS] Anyone having any DNS issues?

GTE Internet, which was in 4.0.0.0/8, was spun off from GTE, the ILEC, when Verizon was formed in 2000. It became Genuity, and had no more to do with Verizon than spin-off ATTBI had to do with AT&T Corporation. As Comcast bought ATTBI, without buying AT&T Corporation, so Level 3 bought Genuity (former GTEI) without buying Verizon.
--
Norman
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum

barmar

join:2008-05-29
Arlington, MA

reply to yarrrrr
The Verizon reference is because of history. Once upon a time there was BBN Planet, a nationwide ISP (nee Bolt, Beranek & Newman). They were acquired by GTE and renamed GTE Internetworking. During this time they implemented a new DNS infrastructure, and put the nameservers in the GTEI.NET domain.

GTE merged with baby bell NYNEX to form Verizon. As the Bell breakup consent decree was still in force, they had to divest the national ISP division, and it became the public company Genuity. Genuity was later acquired by Level(3).

However, Verizon kept ownership the GTEI.NET domain, perhaps because they continued to use it for their local ISP businesses (which they didn't have to divest). And Genuity/Level(3) never felt the need to change the names associated with 4.2.2.x. There was still a pretty tight relationship between Verizon and Genuity after the spin-off -- Genuity actually operated Verizon's DSL infrastructure (at least they did when I was still there, about 5 years ago).


yarrrrr

@comcast.net

reply to NormanS
GTE(I) = Verizon, but the 4.2.2.1/2/3/4 are on Level3's address space.

$ host 4.2.2.2
2.2.2.4.in-addr.arpa domain name pointer vnsc-bak.sys.gtei.net.

Registrant:
Verizon Trademark Services LLC (DOM-384172)
1320 North Court House Road
Arlington VA 22201
US

So they're on L3 address space, but the hostname and everything points to Verizon.

NormanS
Premium,MVM
join:2001-02-14
San Jose, CA
·Pacific Bell - SBC

reply to m0unds
said by m0unds See Profile :

iirc, the 4.2.2.1, 4.2.2.2 etc DNS servers offered by VZ are now closed.
They are not Verizon DNS servers. They are run by Level 3.

They are still accessible to me:
The fastest are my ISP servers (last pair).

--
Norman
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum


Artist027
Mobbossgotti

join:2001-09-21
Hoth

reply to MemphisPCGuy
said by MemphisPCGuy See Profile :

You need to reboot everything first. Comcast is also notorious for timing out your lease and not giving one back to the same ip# in a timely fashion. Once you can log into your router, Clone your Computers MAC address and see if things tip right side up again.
If I clone my MAC addy will that do anyting negative. I work from home via a VPN connection my company set up and I don't want to clone the MAC Addy if it will screw that up or my wife's labtop that connects wirelessly. The re-boot didnt fix the issue but I can now get on the router.


Artist027
Mobbossgotti

join:2001-09-21
Hoth
reply to MemphisPCGuy
Will do now. Thanks.


MemphisPCGuy
Senior Systems Engineer
Premium
join:2004-05-09
Memphis, TN
·Comcast

reply to Artist027
You need to reboot everything first. Comcast is also notorious for timing out your lease and not giving one back to the same ip# in a timely fashion. Once you can log into your router, Clone your Computers MAC address and see if things tip right side up again.
--
Computer Repair & Networking Services
»MemphisPCGuy.com


Artist027
Mobbossgotti

join:2001-09-21
Hoth
reply to Artist027
Now I can't reach google.com either


Artist027
Mobbossgotti

join:2001-09-21
Hoth
reply to MemphisPCGuy
Does it seem odd that now I can't even access my router via the 192.168.1.1 like I used to for the last 7 years?


MemphisPCGuy
Senior Systems Engineer
Premium
join:2004-05-09
Memphis, TN
·Comcast

reply to Artist027
said by Artist027 See Profile :

Funny thing is my buddy who is 3 miles away can access them just fine.
1) That's the notorious part of CC DNS I spoke of

2) Unless you walk over there and see it yourself ... don't believe it
--
Computer Repair & Networking Services
»MemphisPCGuy.com


Artist027
Mobbossgotti

join:2001-09-21
Hoth

reply to MemphisPCGuy
I'm using the 4.2.2.1 ones now and Im still unable to get to godaddy or the other personal and business sites I have. Funny thing is my buddy who is 3 miles away can access them just fine.
--
Got Ink? Wanna Share it? Then go to »shareyourtattoo.com and send it in! Or just stop by and check out the galleries of Tattoos from around the world!

m0unds

join:2003-02-17
Albuquerque, NM

1 edit
reply to MemphisPCGuy
iirc, the 4.2.2.1, 4.2.2.2 etc DNS servers offered by VZ are now closed.

208.67.220.220 / 208.67.222.222 = OpenDNS


MemphisPCGuy
Senior Systems Engineer
Premium
join:2004-05-09
Memphis, TN
·Comcast


3 edits
reply to Fr0zen
Everything seems ok here in Memphis, TN

Comcast is somewhat notorious for regional DNS outages. Perhaps changing to the ever popular 4.2.2.1 as a primary would alleviate your problems.

Tracert it vs the Comcast one ... it was actually closer to me than CC's

If it's a new domain, it could be a caching issue. On windows XP/Vista drop to command prompt as Admin and try a

c:\Documents and Users\ blah blah bla....>ipconfig /flushdns

That will empty your local DNS cache. If running Vista I trust you have your UAC enabled?

EDIT: yep. Me neither - GoDaddy is not found. If only I could justify paying more for what Comacast gives me. Chances are Level 3 is having another bought of sellers envy

--
Computer Repair & Networking Services
»MemphisPCGuy.com
Forums » US Cable Support » Comcast » Comcast HSI[NEWS] Comcast Domain Hackers Speak »
« (topic offline) Comcast hacked?  


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