vm created in the sandbox cannot reach https://dot.net

Question

I am working on the following lab:

https://learn.microsoft.com/en-us/learn/modules/host-build-agent/4-create-build-agent

the step to get dontnet-install.sh is not working:

Install .NET as the sudo (non-root) user

sudo -i -u $SUDO_USER bash << EOF
curl -sSL https://dot.net/v1/dotnet-install.sh | bash /dev/stdin -c Current -v $DOTNET_VERSION
EOF

azureuser@MyLinuxAgent:~$ curl -sSL https://dot.net/v1/dotnet-install.sh
curl: (7) Failed to connect to dotnet.microsoft.com port 443: Connection timed out

Answer 1

run below command

wget -q https://packages.microsoft.com/config/ubuntu/16.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb
sudo dpkg -i packages-microsoft-prod.deb

then edit it

vi build-tools.sh

go to insert mode and add following commands

sudo apt-get update

sudo apt-get install apt-transport-https

sudo apt-get update

sudo apt-get install dotnet-sdk-3.0

sudo apt-get update

sudo apt-get install dotnet-runtime-3.0

save the file : Press Esc then :wq + Enter

Then run below commands

chmod u+x build-tools.sh

sudo ./build-tools.sh

Answer 2

I just used my account, not the sandbox, and there it worked ok, I don't know why the sandbox has that problem connecting to dotnet.microsoft.com, cause in my case that was the error, cannot curl that url, but from my azure account directly creating the VM there, the lab worked.