WebApps in same VNet unable to talk each other

Ricky Lie 1

Hi all,

I have 2 linux webapp for container under same VNet.

From inside the webapps, I can see their VNet IPs are:

Webapp 1:

Webapp 2:

But I couldn't ping/telnet from one webapp to other webapp (either stuck or destination not reachable).
There's NSG applied, but the VNet source/destination already listed in inbound/outbound rules and are allowed.

How to fix the webapps? How to configure the webapps so they can talk with each other?
Thank you.

Ryan Hill 25,666 Reputation points Microsoft Employee

2021-01-19T23:59:28.003+00:00

Hi @Ricky Lie ,

Do you run into the same issues when you using tools such as tcpping or nameresolver?

Regards,
Ryan
Ricky Lie 1 Reputation point

2021-01-20T02:42:57.987+00:00

Hi @Ryan Hill , I think tcpping and nameresolver only available for windows?
Ryan Hill 25,666 Reputation points Microsoft Employee

2021-01-20T03:13:39.703+00:00

You can still use tcpping on Linux hosted App Service.
Ryan Hill 25,666 Reputation points Microsoft Employee

2021-01-21T18:46:56.433+00:00

Hi @Ricky Lie , when using tcpping, do you see a response from the other app service?

Regards,
Ryan
Ricky Lie 1 Reputation point

2021-01-22T00:56:04.12+00:00

Hi @Ryan Hill I installed the tcpping on one webapp and tried to tcpping other webapp, but it's getting same result as ping:

seq 0: no response (timeout)
seq 1: no response (timeout)
seq 2: no response (timeout)
seq 3: no response (timeout)
seq 4: no response (timeout)
Ryan Hill 25,666 Reputation points Microsoft Employee

2021-01-25T14:21:25.68+00:00

@Ricky Lie can you walk me through the steps you did to create your VNET, including subnet and associated your web apps?

Regards,
Ryan