When I try to run a command -- (for example: sfdx update), I get the following message on the cmd prompt:

Attempting to contact update site.. S3 host is not reachable..

Has anyone here come across this message earlier. Any inputs would be greatly appreciated. Thanks!

  • I am facing same issue. Were you able to solve this issue? If yes, please help. Thanks Commented Aug 21, 2018 at 6:26

2 Answers 2


This is a proxy issue. Had same problem here on internal network (with a nasty proxy), switched to guest network and didn't have it anymore and it got updated successfully.


In my case problem was that Visual Studio Code was running updates at the same time. After VS completed and restarted a few times, I was able to run >sfdx update

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .