Can't access an app on Azure VM via Public IP

Question

Can't access an app on Azure VM via Public IP

Mate Kiss 20

Hi, A rookie here ;)

I have a Win11 Azure VM, and I installed a small application to it that I have to access from the internet. I set the port that I would like to use to 443 and that certain port is seems to be open:
sc1

Unfortunately, I can't access that small application from the internet and when I try to check 443 port with "Terminal" then it is "timed out": sc2

I get the same result when I try the same 443 port from the Win11 AzureVM itself, using Telnet and the public ip: sc3

I can "call the 443 port" successfully with telnet if I use the "local" links (localhost, 127.0.0.1 and the private ip).

Any recommendations what to check and adjust?

Thanks in advance, M

v-vvellanki-MSFT 4,920 Reputation points Microsoft External Staff

2024-02-20T05:14:55.6+00:00

Hi @Mate Kiss , Just checking in to see if the below answer helped. If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.

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v-vvellanki-MSFT 4,920 Reputation points Microsoft External Staff

2024-02-20T05:14:55.6+00:00

Hi @Mate Kiss , Just checking in to see if the below answer helped. If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.

Answer 1

TP 146.9K Volunteer Moderator

Hi,

Inside of the VM, please open Windows Firewall with Advnanced Security (wf.msc) and verify that you created a rule for Inbound port 443 and on Scope tab you are allowing Any IP address (or set a specific IP address if that is your preference) for Remote IP address.

Please click Accept Answer and upvote if the above was helpful. If you still need assistance please add a comment below.

Thanks.

-TP

TP 146.9K Reputation points Volunteer Moderator

2024-02-19T15:00:05.0266667+00:00

@Mate Kiss Any update?
Mate Kiss 20 Reputation points

2024-02-19T16:55:38.36+00:00

Hey TP,

Thank you very much for your answer! I am still not sure what is the root cause, as I have the proper inbound rule in windows firewall, but I am pretty sure I miss a small step here since if I disable the firewall (for testing ;) ), then everything works well.

So thank you and I continue to investigate the issue.
TP 146.9K Reputation points Volunteer Moderator

2024-02-20T03:57:10.7866667+00:00

Thank you very much for your answer! I am still not sure what is the root cause, as I have the proper inbound rule in windows firewall, but I am pretty sure I miss a small step here since if I disable the firewall (for testing ;) ), then everything works well.

Based on the fact that it works if you disable the firewall, it appears there is something wrong with the inbound rule. Please post screenshots of the Inbound rule's tabs as they appear in wf.msc.

Following tabs should be enough to diagnose it: General, Programs and Services, Protocols and Ports, Scope, Advanced

Thanks.
TP 146.9K Reputation points Volunteer Moderator

2024-02-21T15:34:35.33+00:00

@Mate Kiss Any update? If you've already resolved the issue, please click Accept Answer to close up this thread.

Thank you.
Mate Kiss 20 Reputation points

2024-02-26T10:52:04.87+00:00

All works! Thank you for your support.
Azure. Ben Tsui 0 Reputation points

2024-10-30T08:32:05.9666667+00:00

Hi TP, I have similar issues and I use your method. It works! Thanks!

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Can't access an app on Azure VM via Public IP

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