[2023] Keep disconnecting due to unable to connect

We've been able to narrow down the issue and can confirm this is a problem with a specific ISP.

If you have a PC you can confirm that you have this problem by:

• Opening a command prompt and typing “nslookup api.warframe.com” 
  • if it reports 23.40.172.184 as one of the addresses, your DNS server is returning stale information and is effected. 
• Unfortunately it seems there is a pool of addresses returned and you may not see the bad one immediately (this is why the game can sometimes work but then will fail at random).
• Tip: press the up arrow and then enter to re-run the same command a few times – in normal circumstances the addresses resolved might change every 20 seconds or so.

As others have pointed out in this thread there is a workaround: you don’t have to use the DNS servers provided by your ISP. You can switch to a free DNS server locally on your PC, console or on your home router: 

• Google [https://developers.google.com/speed/public-dns/docs/using]
• Cloudflare [https://developers.cloudflare.com/1.1.1.1/setup]
• And others are available as well

One issue we encountered with overriding your ISP’s DNS server, however, is that it appears this ISP specifies IPv6 DNS servers as well – we’re still investigating but in some cases changing the IPv4 DNS settings didn’t work until either IPv6 was disabled or the IPv6 settings were changed in tandem with the IPv4 settings.

Sadly, this is not the first time we’ve had this problem: in February we saw the same issue with this ISP. For some reason their DNS servers are returning stale addresses and ignoring the 20-second expiry we specify and have been returning a value that changed almost a week ago.

The last time our network partners were able to rearrange some equipment so that the stale address returned by the ISP’s DNS server still worked but unfortunately this is not possible this time. Our network partners are trying to reach out to this ISP to tell them about their misconfiguration but since we aren’t their customers this has not been effective.

We’re currently waiting to hear back from our network partner about their efforts to contact this ISP however if you want to try to contact your ISP yourself the key things to tell them are:

1. Their DNS servers are sometimes returning stale addresses for api.warframe.com (and probably others)
2. Specifically it should not resolve to 23.40.172.184
3. This is not a problem for millions of people on connecting through different ISPs.
4. Other customers impacted by this have successfully switched DNS servers to work around this problem.

Thank you to those who have attempted to help other Tenno to find solutions in the meantime, hopefully the issue will be fixed soon but for now this is a solution that we can use. 

April 25th, 11am EDT update

An ISP provider have resolved troublesome IP and has since fixed the connectivity issue. If you have already changed your DNS settings, nothing else is needed on your end. If you were still experiencing issues, they should now be resolved. 

Thank you all!