Error "No such host is known" in Microsoft Teams after publish chatbot and create virtual network

Hello everyone,
Currently I received a request for a chatbot security feature. Only the specified IPs are allowed to interact with the bot. I use "Virtual Network" for "Translator" and "Luis". It worked fine on local (Emulator) but after deploying to Microsoft Teams it got an error "No such host is known". Do you have any idea for that error? I make sure I added IP's Teams. Please help me fix it Screenshot_1

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Wajeed-MSFT 231 Reputation points Microsoft Employee

2023-02-28T09:56:37.8666667+00:00

Are you getting this exception in your bot code?
Nguyen Hoang Xuan (DPS.SPD) 0 Reputation points

2023-02-28T10:00:52.5366667+00:00

Hi Wajeed, Thank for your response me.

I don't get it in my code. In Emulator, It's still work. So I can't debug the cause
Wajeed-MSFT 231 Reputation points Microsoft Employee

2023-02-28T10:19:11.62+00:00

Given that reply has been posted back to Teams channel, communication between Teams and Bot (deployed /api/mesasge code) is established. Would it be possible for you to add more logs to check from where this response is sent back to Teams user?
Nguyen Hoang Xuan (DPS.SPD) 0 Reputation points

2023-03-01T01:37:50.0266667+00:00

I don't know where can I check logs? Can I see logs in Microsoft Teams channel of Bot Channels Registration?