`az login` fails with "Failed to establish a new connection: [Errno -2] Name or service not known'"

Question

`az login` fails with "Failed to establish a new connection: [Errno -2] Name or service not known'"

Kashif Ilyas 0

I continously get this error when I try to login using az login from my Ubunut 20.04 VM. There are no internet issues and all microsoft services are apparently accessible from the machine. After 7-10 retires, it finally succeeds. This is very annoying. Can someone help?

Here is the backtrace:

A web browser has been opened at https://login.microsoftonline.com/organizations/oauth2/v2.0/authorize. Please continue the login in the web browser. If no web browser is available or if the web browser fails to open, use device code flow with `az login --use-device-code`.
The command failed with an unexpected error. Here is the traceback:
HTTPSConnectionPool(host='login.microsoftonline.com', port=443): Max retries exceeded with url: /organizations/oauth2/v2.0/token (Caused by NewConnectionError('

deherman-MSFT 38,021 Reputation points Microsoft Employee Moderator

2023-01-23T17:36:54.8966667+00:00

Can you confirm which version of az cli you are running? Are you running inside a container? If so you might checkout this similar GitHub issue.
deherman-MSFT 38,021 Reputation points Microsoft Employee Moderator

2023-01-26T17:59:12.6033333+00:00

Hello,

I hope this has been helpful! We appreciate hearing from you and would love to help others who may have the same question. Accepting answers helps increase visibility of this question for other members of the Microsoft Q&A community. Thank you for helping to improve Microsoft Q&A!

1 answer

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deherman-MSFT 38,021 Reputation points Microsoft Employee Moderator

2023-01-23T17:36:54.8966667+00:00

Can you confirm which version of az cli you are running? Are you running inside a container? If so you might checkout this similar GitHub issue.
deherman-MSFT 38,021 Reputation points Microsoft Employee Moderator

2023-01-26T17:59:12.6033333+00:00

Hello,

I hope this has been helpful! We appreciate hearing from you and would love to help others who may have the same question. Accepting answers helps increase visibility of this question for other members of the Microsoft Q&A community. Thank you for helping to improve Microsoft Q&A!

Answer 1

Ovidiu Borlean 1 Microsoft Employee

Hello Kashif**,**

Thank you for reaching out to Microsoft Q&A!

From the provided output it seems to be related to a name resolution issue. If you are not running behind a proxy server that could interfere with the traffic between your host and login.microsoft.com. You can try add a public DNS server (8.8.8.8) in your /etc/resolv.conf and check if the problem persist.

If the reply was helpful, please don’t forget to upvote or accept as answer,

Thank you.

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`az login` fails with "Failed to establish a new connection: [Errno -2] Name or service not known'"

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