Is this a valid IP configuration? Please help me to understand !

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networkuser

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Jul 30, 2013
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Hello board!

Please HELP ME UNDERSTAND THIS!

Here is the short story:


Yesterday I have spent about 2 hours on the phone with various comcast call center workers, asking them to help me sort it through, but I don't think the tech support properly addressed my concerns.

Attached please see the screenshots of dos cmd and gmail / ip log details.

15z58qp.jpg


kcle2c.jpg



I have blocked portions of IP addresses for privacy reasons, but if you look at the images you can see the ODD, VERY LONG IP address (looks like ipv6? ip ?) that shows both on gmail log details and on DOS screen under ipconfig results.

I am not very good at computers, but certainly something doesn't look right. I never had 28 alpha-numerical string appear as IP address on IP log page of my Gmail account.
Also, facebook had blocked my access to my own page, stating it couldn't recognize the device I was logging from. I always used to have 10 digit IP address, in 4 blocks of 2 to 3 numbers per block ( ex. xxx.xx.xxx.xx )
Never had such a long string of alpha-numeric characters appear on IP logs or under ipconfig results on DOS.
What this could be? Is there a technical malfunction?

Comcast told me everything was normal, they just turned off the ipv6 from Network menu , but I am not convinced that this is how it should be.

Can anyone help me get an insight, to understand what (if anything) went wrong? ? ? ? ?
 
Solution
Beachnative
All your ipconfig shows is YOUR configuration of your network settings in your LAN, that is it!

Your IP address in both IPv4 and IPv6. It does not show what the your router is reporting. Don't think so? Do an ipconfig with your adapter properties with both IPv6 and IPv4 selected, then remove IPv4, do another ipconfig and you will see your IPv6 address only. Next go back to your adapter properties and remove IPv6 and select IPv4, do another ipconfig from the command prompt what do you see? You see only your IPv4 address. What your router is doing on the WAN is another story using your Gmail useage chart shows at 4:49pm there was a change made and is reporting IPv6 not the other way around.
The access types marked as "Mobile" are...
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networkuser

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Jul 30, 2013
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How could this be? Router was functioning normal (ipv4 in and out) for several months since Comcast set up the service , and all of a sudden it switched to IPv6?
 
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kyzarvs

kyzarvs

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Aug 19, 2008
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If your router was defaulting to IPv4 only because IPv6 wasn't available on your connection - and then ComCast turned it on, that would explain it?

Either way, it's a good thing! I don't know where in the world you are, but here in the UK I wish our providers would do it to force people onto IPv6 - our company supplies and controls internet connections for education and it's maddening having to deal with the few IPv4 addresses left :)
 
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Beachnative

Beachnative

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Jan 25, 2013
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All your ipconfig shows is YOUR configuration of your network settings in your LAN, that is it!

Your IP address in both IPv4 and IPv6. It does not show what the your router is reporting. Don't think so? Do an ipconfig with your adapter properties with both IPv6 and IPv4 selected, then remove IPv4, do another ipconfig and you will see your IPv6 address only. Next go back to your adapter properties and remove IPv6 and select IPv4, do another ipconfig from the command prompt what do you see? You see only your IPv4 address. What your router is doing on the WAN is another story using your Gmail useage chart shows at 4:49pm there was a change made and is reporting IPv6 not the other way around.
The access types marked as "Mobile" are irrelevent.Ones marked "Browser" are the ones to pay attention to and I would assume are made from your house?

The times from 4:49 to 5:34 show an IP type change from v4 to v6...That is your clue of what happened. If you can go back even further on your historical useage from Gmail and look for these changes if any.
If there are none then it would make sense that your modem/ router wasn't updated correctly (assuming you are using their modem/router combo). When you called they fixed it. Clear as mud ain't it?
 
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