App service: Port 4022 is open, but remote debugging is off

Owin Gruters - iO 46

Hi,

A security scan revealed that port 4022 is open, which is supposed to be intended for VS 2017 remote debugging. But this feature is turned off.

I know I can block this myself using NSG's etc, but it should be turned off by default if remote debugging is off.

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Kind regards

Grmacjon-MSFT 17,886 Reputation points

2024-07-08T22:20:04.1033333+00:00

Hi @Owin Gruters - iO You're right, this is odd behavior. it’s possible that the port could be open due to some other service or configuration. can you double check to make sure no other services are using port 4022? Some other service might be keeping the port open
Owin Gruters - iO 46 Reputation points

2024-07-09T09:13:04.58+00:00

@Grmacjon-MSFT We usually close down as much as possible, so all the things I an think about are off. Can you give a hint what to look for, otherwise it's a needle in a haystack.
Grmacjon-MSFT 17,886 Reputation points

2024-08-06T22:15:26.2166667+00:00

Thanks for the update Owin. It looks like this issue require deeper investigation. Could you please send us an email to AzCommunity[at]Microsoft[dot]com with the below details, so that we can enable a one-time-free support for you to work closely on this issue?

Email subject: <Attn - Grace >

Thread URL: <Microsoft Q&A Thread>

Subscription ID: <your Azure subscription id>

Please let me know here once the email is sent along with above requested details.

Thanks,

Grace
Owin Gruters - iO 46 Reputation points

2024-08-07T10:02:17.77+00:00

@Grmacjon-MSFT will do. But what should I fill in for <Attn - Grace >?
Grmacjon-MSFT 17,886 Reputation points

2024-08-07T15:55:51.0133333+00:00

@Owin Gruters - iO you don't need to fill it out. Just add "Attn - Grace" in email subject.

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