Is anyone else having problems with a changing IP address?

Sherlock Holmes wrote:

When I do that I get told my IP is “likely” static:

 

 

 

What do you guyes see for that when you visit that site?

Regarding that “Likely Static” message...I am presently connected to an AT&T fiber network and it says the same thing for me...so I don’t think it’s a reliable indicator.

I just switched to T-Mobile 5G internet service 3 weeks ago from years wirh CenturyLink DSL.

The speed is definitely an upgrade, however, I came upon 2 problems. 

1. My HP Printer would not accept the PW from my T-Mobile router. I had to create a new Gateway which fixed that problem.

2. When trying to upload new files, music to my personal website, my FTP programs could not find the server. After contacting my ISP, they said they found this:

"Please be informed that your WAN IP has been blacklisted by Spamhaus ZEN, refer to the following link:"

  https://mxtoolbox.com/SuperTool.aspx?action=blacklist%3a172.58.79.67&run=toolpage We advise you to contact your Internet Service Provider for assistance.

Tech support for T-Mobile ran a check and have no answers for my IP being blacklisted. But upon further communications with T-Mobile, they told me this 5G internet has a "dynamic" IP address (forgive me if I'm not exact) and not a "static" IP address. And cannot be made to have a static IP address.

Bummer. I NEVER had these issues for 20 years before changing to T-Mobile. Looks like I'll be looking for another internet company unless someone has any suggestions. 

MD

mrc3 wrote:

What is happening is that a device within t-mobile is doing NAT (network address translation) and using a different source address for every new connection to a different destination IP address.  IT SHOULD NOT BE DOING THIS as it causes problems like this, especially with cloud based servers where the a given DNS host name has multiple IP addresses. The NAT device needs to disregard the destination address in it's NAT lookup for new connection attempts.  
 

Its not just NAT or CGNAT, its 464XLAT. Meaning your device is actually assigned a real IPv6 address, and issued an IPv4 IP only at the tower's edge. When you make an outbound connection, a WAN IPv4 address is assigned and translated via your IPv6 connection. This has the effect of an IP NAT pool, but not for the same reasons. A case-study was released where T-mobile claimed to do this as a result of IPv4 exhaustion causing deployment issues. This is more likely a side effect of the exhaustion of IPv4 than a sign of T-Mobile arrogance. Failure to communicate? Claro.

This means IPv4 traffic does not exist between the tower and the edge of T-Mobile network. It is all translated over IPv6. This is likely to become an increasing practice over time as IPv4 is finally phased out.

T-mobile does offer static translation (as Static IP Addon) to fix this issue, but only for business accounts. No clue why, either because T-Mobile literally doesn't have the 2 million IPv4s needed to handle the 2.0 million new home internet lines added in 2022, or because it's existing systems can't support 2 million extra assignments.

So the device has already NAT'ed my address to map between IPV6 and IPV4 with the first persistent TCP connection that is made.  Why does the device need to map a NEW IPV4 address for the next connection that goes out?   Just lazy software implementation?   Even if they have overallocated their NAT pool, the other members of the TCP tuple (source port primarily) should be able to chosen to make the NAT translation unique for a given destination address and port.

Mike

Why do my senses tell me there is a whole lot of illegality with what they’re doing here.
 

So I've been an early adopter of T-Mobile Home Internet before the official release. I have this Nok router and have had to have this thing replaced several times since I first received this one. I probably should have kept the original white router.

Right now I'm dealing with a geolocation issue where if I check on SpeedTest's website, it says I'm in Puerto Rico all the while I've been in Connecticut the whole time. I've tried to restart the router several times, I tried to get T-Mobile to release the IP address [they said they can't do that]. I also play games on my network and a certain app I use requires me to have a more localized IP address. Since Friday [01/27/2023] around 3pm Eastern time I have communicated with T-Mobile's Home Internet Division several times [I've definitely isolated the problem down to the connection] They told me on Saturday [01/28/2023] that it may be conducive to find another provider since they can't accommodate giving me a static IP address on a non-business account. They also told me that they've also replaced this NOK router so many times [even though each time the router stopped working on it's own within 3-6 months every time] that they would only be able to do one more replacement [I told them to notate that the authorization for a replacement] which concerns me especially since I've been a customer for 11 years.

I honestly don't care if the IP address is static or dynamic, I just want this working once again. And even if it is dynamic, the IP address geolocation shouldn't be 1,600+ miles away. 

The binding of IP addresses to Geography is lucky happenstance that is not legislated or mandated.  It is generally offered as a third party service by companies such as Maxmind, who make an effort to maintain their mappings for use by other companies.

The reason it mostly works, is that companies are allocated IP address ranges and generally those ip address ranges are associated with an internet access point somewhere on the globe.  The IP address allocated to your region of Connecticut  has been assigned to t-mobile.  Perhaps t-mobile moved it from Puerto Rico to Connecticut, or perhaps the geo-location vendor mapped in incorrectly. 

If it matters to you, contact the webmaster of speedtest and find out who their geolocation provider is.  Then contact that vendor to let them know of the incorrect data.

Mike 

FYI, in my area of Minneapolis, this issue appears to be resolved.

Mike

Sherlock Holmes wrote:

rid wrote:

This is causing me not to be able to log into my banks that use Netteller becasue the IP is changing mid login. Netteller thinks its a redirect hack. Really annoying.  I have to call tmobile to have the reset everything every time, then it works for a week, then stops.  Going to have to change provider.

Who was your previous ISP? did you have a static IP address? Ordinarily this is something you pay a bit extra for. The norm is dynamic IP, it will change unpredictably. You need a static IP if you are running your own webserver for example, that's how the outside world can find you (the DNS system will map your domain name to that static IP).

But for day to day internet use I’ve never heard of people needing a static IP address, most home internet plans are by default dynamic IP no matter who the vendor is, Comcast, TMobile, CenturyLink...

The outside world isn’t calling in to you, you call out to external sites and services and for that we use username/password etc to gain access to them.

This is classic Dunning-Kruger. You think the super-shallow knowledge you have is vast, and presume to lecture people who know more than you do.

@skyhookt,”This is classic Dunning-Kruger. You think the super-shallow knowledge you have is vast, and presume to lecture people who know more than you do."

Could you expand on this?

I'm only like a half hour into searching that interweb thing for the answer as to why all of my Google Nest devices are going crazy but I betcha this is it. I am not a techie but I might be considered "tech adjacent". A half hour in and I am done with T-Mobile entirely. Spectrum has better deals at the moment anyways. It's easier to just change carriers than troubleshoot crap like this. Sorry, T-Mobile, piss off. Hello cable!