Before yesterday (10/17/2022), I've always had a command prompt window (MS Windows) up running a constant ping at 3 second interval - so I can tell when the network starts to degrade or just stops responding (which has become very frequent in the last few months).As of yesterday morning, both ping and tracert commands consistently fail. As in no longer any response. So it appears the ports used for those commands are now being blocked on the 5g network? I have a 5g phone on Tmobile, and I see the same result. On 5g with hotspot turned on, with computer connected, ping and tracert fail 100%. If I force the phone to use LTE and stay off 5g, ping and tracert start working again. Don't really understand why Tmobile would block such a basic network analysis command.This is in downtown Scottsdale AZ. As a sidenote, service on the 5g network degrades consistently every day after about 8am, and usually is consistently bad all weekend long. Works great before 8am most days.

Yes, as of my post it seems T-Mobile is actively blocking Ping, Tracert, Traceroute and ICMP in addition if they do go through at all, they are deprioritized to the point that they are not effective to use in any capacity.This sucks really bad... I use multiple uplinks and depending on the RTT, RTTSD, Loss it switches providers to balance connections across them… This behavior from the ISP breaks tons of functions as well as my link down failover automations. I hope T-Mobile realizes that ping and tracert/tracroute are 1000% necessary for proper network management and trouble shooting. Verizon and AT&T don't have this problem of blocking pings, it is a T-Mobile specific issue and really makes the brand look cheap and the network mismanaged. You can have a secure network without blocking normal and essential network tools that have existed since before I was born.

I am in east TN with the Nokia gateway and I ran a quick test with a Macbook Pro and a Linux client. With the Macbook Pro the pings have a significant delay where several request time out messages were reported prior to an actual response typically 140+ ms between responses. I went to a Linux client and did a forced ipv6 ping based upon a prior test. I get a similar response performing IPv6 and IPv4. Both have extreme delay times and are not very useful Of the forced 23 ipv6 ping packets 5 were received with a ~78% loss. So, yes it appears T-Mobile has jacked up the use of ICMP as a trouble shooting tool. Based upon the two tests I ran it appears pings with IPv4 fail much worse than IPv6 pings but the use of pings now is pretty much useless.I fail to see why they feel this would be positive for users. Make it more difficult for users to identify potential issues so they are totally blind. It just makes calls to TMO support less productive when users with such basic knowledge cannot tell support what they do not see.

I can understand that. Another user was using the T-Mobile solution as a back up and doing a similar tactic with his negate firewall. In order to insure the failover could take place he had to disable the ping processing. When the Starlink fell it still transitioned to the backup. I don't mean to lessen the importance of being able to have ICMP packets passed. I have seen the excessive loss and latency of the ICMP responses to 150 ms or more so I get it. I just don't think T-Mobile will be invested in resolving it right away. It is hard to tell how extensive the behavior is but it is generating some noise. Maybe with lots more noise they will pay attention.

ShanStewart wrote: Ok, i spoke to T-Mobile tech and they said they no longer support ping so that is interesting. FFS. Since we'e picking & choosing cucial communication potocols now, I've decided to no longe suppot the lette 'r'.

Hi, I too wish T-Mobile would fix this, and that the issue deserves to be newsworthy!I have been having major issues related to my T-Mobile home internet, primarily devices like home assistants and their accessories that rely on lower latency to fulfil requests. My Nest Mini now takes on average 10 full seconds to begin loading the response. Beyond that, issues with security since my cameras have increased lag making my doorbell camera less useful, and problems with my DNS not able to properly filter the web. I'm not the only one and neither are any of you: https://community.t-mobile.com/tv-home-internet-7/dns-provider-for-home-internet-38694Clearly this is an aggressive rollout of provisioning. To report my locale, I'm in the PNW but most of you are in the South/Midwest states like Texas. Well, location doesn't seem to matter IMO as I still have noticed many issues recently, to the timeframe given in this forum, in where my web filter has not been able to deny requests properly on one of my home computers. I believe ICMP details noted are related.Sadly enough, I am JUST learning how to network in college, in my second year and taking classes related specifically to latency and ping... So just wanted to note that I am genuinely affected by this… My own learning material has me doing these types of ICMP ping requests in Windows, and some posts here are lining up with my college material, but while learning from other members here has been fun, it also means to realize that my learning just got a lot harder BECAUSE of my fervent interest in bleeding-edge wireless tech… It doesn't have to be this way!When testing using Fast.com and other methods, I'm anywhere between 50ms and 1.2seconds loaded for latency. While that hasn't been an issue, what's different is that now never reporting the lower number. One second of latency means I can pretty much throw away my Xcloud membership LMAO I have much better results playing using my phone's mobile hotspot.Other tests, like Edge's in-browser utility, no longer can report latency at all and therefore the program hangs. Just as another user said, it makes it harder for a given person who doesn't know what's going on understand what's happening. This issue is compounded when the customers end up calling staff who have no source of truth for information on ping/latency leading to no progress for either party.All in all, this is snowballing quickly and the best action really is to roll back these changes or communicate the incoming fixes. At minimum, progress in this would feel like acknowledging that the official stance isn't that "ping isn't used anymore" by T-Mobile and instead the stance customers want to see would be closer to working on a solution to the existing latency and ICMP problem for T-Mobile Home Internet users Nationwide.Thanks to other forum members here, I understand now that if I want to continue to effectively filter my web I now need an addition device, a VPN (a hardware solution akin to a PfSense router) between my modem and personal router… and I would rather configure my own hardware like the ASUS modem I had before, but T-Mobile Home Internet does not support other hardware even if I did try and use a hotspot or 3rd-Party 5G Modem. I really don't want a bunch of networking equipment at home, I'd wanna leave that for school lol... so it's horrible to see this provisioning and clearly it's basically "love it or leave it" unless we outcry. So I'd like to join you all in a big +1 @inductivesoul @iTinkeralot @ShanStewart @Walkabt and ask T-Mobile to sympathize with customers, geeks and nerdy students alike and cool it with the way their locking down these gateways.

Has ping / tracert been blocked on 5g network?

iTinkeralot
Bandwidth Buff
Hace 3 años
For some reason it appears T-Mobile is blocking ICMP traffic. Both the ping utility and trace routing use ICMP so it pretty much breaks both. Here in east TN now nothing when pinging. Ten packets sent zero responses. The other day the latency was 180 ms plus and 80% loss. Now nada
ShanStewart
Transmission Trainee
Hace 3 años
JMS wrote:

Here in the S.F. Bay Area I had a similar ping problem for about a week -- about 70-80% lost packets. Starting two days ago, I've had no problems. Tried half a dozen sites, all respond with 0% loss. Hopefully the issue gets resolved where you're at...

Glade to hear your issue was fixed. Was worried they changed something. Knowing it is a technical issue that will be resolved is better.
AdmiralSchitt
Network Novice
Hace 3 años
I haven't seen many issues out if it yet but it's very annoying. I use Teams for work and it's working fine.

As a Network Admin though, this makes some of my troubleshooting I do day to day very difficult.
ShanStewart
Transmission Trainee
Hace 3 años
I tried calling T-Mobile support but no one understands the issue or even knows what ping is.
Not to mention as a network admin I use apps on my iPhone all the time to ping our external services when I am not near my laptop.
JMS
Roaming Rookie
Hace 3 años
Here in the S.F. Bay Area I had a similar ping problem for about a week -- about 70-80% lost packets. Starting two days ago, I've had no problems. Tried half a dozen sites, all respond with 0% loss. Hopefully the issue gets resolved where you're at...
ShanStewart
Transmission Trainee
Hace 3 años
Yeah we have probably 5 users that have reported issues with Teams connecting since yesterday (probably started before on the weekend). After looking at it found they all have T-Mobile home internet. I also have T-Mobile home internet as a second ISP. Cox works fine, ping fails on T-Mobile.
AdmiralSchitt
Network Novice
Hace 3 años
I'm seeing the same thing with my T-Mobile Home Internet. Can't ping out.
I’ve had decent experience so far except for some work VPN issues and gaming but blocking or deprioritizing ICMP until it’s not usable is kind of crazy.
Luckily, Verizon is turning up a brand new tower in my town next month with their 5GUW / C-Band gear. They also support IP passthrough so your own router can have public IP address.
ShanStewart
Transmission Trainee
Hace 3 años
This is really bad. This breaks Microsoft Teams among other services I am sure. MS Teams requires ping to verify connectivity to work (pings teams.microsoft.com). If ping fails then Teams will go offline.
Ping fails from my T-Mobile router gateway and from my T-Mobile phone.
jimibak
Roaming Rookie
Hace 3 años
Having same problem as others, in OC NY. Using TMHI as secondary WAN, with opnsense cluster behind it. Use ICMP to detect gateway outage.

Got a sagemcom modem a week & a half ago, integrated it into my network. Worked fine for a day or two, then suddenly couldn't ping through it. Didn't take metrics; figured something went sideways & that 611 would make it right. Tech support swore up & down that they didn't block ICMP, that it must be "a problem with my computer, and that I should contact my computer manufacturer about ICMP issues." (That would be pcengines & freebsd; they're not the problem.)

Sent me a new modem (another sagemcom), again worked fine for a few days, then back to nope. Have switched the gateway monitor IP to that of the modem - not optimal, since it can only tell if the device is responding, not whether it's routing packets to the outside.

Since both modems [briefly] worked as expected, it makes me think it's a firmware update that's causing the problem; whether it's a bug or a new policy, I can't say. Either that, or they took exception to my pings, though I would argue that 1pps isn't excessive.
Beachbum33
Roaming Rookie
Hace 3 años
I'm in Gulf shores, AL. Having the same issue as others, not get a ping back.

Spent over an hour with T-Mobile tech support and at one pint was told there is no way to turn off ping blocking on the gateway. My problem started just a few days ago also. Had worked fine for months. Except for this have had zero issues and getting 350+ down and 65+ up.