Unable to access API endpoint in AWS from Azure VM

Mahadev, Rakesh [HAEA] 180

Hello Team,

I'm trying to ping one of the API endpoint which is hosted in AWS behind a loadbalancer from Azure VM. I'm getting request timeout error. I've allowed the Source (Azure VNnet CIDR) and Destination (AWS VPC CIDR) and port 443 in Azure Firewall.

Kindly suggest what else I have to do to get ping from Azure to AWS.

Rohith Vinnakota 2,180 Reputation points Microsoft Vendor

2025-01-30T11:50:43.94+00:00
Hi @Mahadev, Rakesh [HAEA],

Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.

We need to enable the ICMP protocol in the network rule for the Azure firewall.

We need to provide the IP addresses for Azure and AWS in the Source and Destination fields.

Does the AWS load balancer support the ICMP protocol? If not, the ping will not work.

Kindly let us know if the above helps or you need further assistance on this issue.

Please don’t forget to close the thread by clicking "Accept the answer" wherever the information provided helps you, as this can be beneficial to other community members.
Rohith Vinnakota 2,180 Reputation points Microsoft Vendor

2025-01-31T13:52:05.0366667+00:00

Hi @Mahadev, Rakesh [HAEA],

Greetings,

Following up to see if the above suggestion was helpful. And, if you have any further query do let us know.
Mahadev, Rakesh [HAEA] 180 Reputation points

2025-01-31T14:24:05.6633333+00:00

Hello Rohit,

Thanks for responding. We have allowed the CIDR in On-prem and it started working. Since we have Express route connectivity b/w Azure and Onprem and Direct connectivity From On-prem to AWS. It resolved our issue.
Rohith Vinnakota 2,180 Reputation points Microsoft Vendor

2025-01-31T14:32:23.74+00:00

Hi @Mahadev, Rakesh [HAEA],

Greetings!

I've turned my comment into an answer.

Please don’t forget to close the thread by clicking "Accept the answer" wherever the information provided helps you, as this can be beneficial to other community members.

Accepted answer

Rohith Vinnakota 2,180 Reputation points Microsoft Vendor

2025-01-31T14:37:14.07+00:00

Hi @Mahadev, Rakesh [HAEA],

I'm glad that you were able to resolve your issue and thank you for posting your solution so that others experiencing the same thing can easily reference this!

Since the Microsoft Q&A community has a policy that "The question author cannot accept their own answer. They can only accept answers by others", I'll repost your solution.

Please click "Accept" the answer as original posters help the community find answers faster by identifying the correct answer.

Issue:

Unable to access API endpoint in AWS from Azure VM

Resolution:

We have allowed the CIDR in On-prem and it started working. Since we have Express route connectivity b/w Azure and Onprem and Direct connectivity From On-prem to AWS.

Please don’t forget to close the thread by clicking "Accept the answer" wherever the information provided helps you, as this can be beneficial to other community members.
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