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AWS Codebuild returning dial tcp i/o timeout

I have a AWS CodeBuild project that would download source from bitbucket.

When running AWS CodeBuild, I received the timeout error below? 

"": dial tcp i/o timeout 

Re-running the CodeBuild project it would sometime work without issue. It would fail about 50% of the time.

1 answer

0 votes
Patrik S Atlassian Team Jan 10, 2023

Hey @Jging Fai Chong ,

Welcome to Atlassian Community!

The error being reported seems like a firewall issue blocking the connections and causing them to time out.

In this case, could you please make sure that your AWS Code Build environment is allowing access to the  Bitbucket Cloud IPs listed in the below documentation? 

Thanks I am following up this with our team to check this is particular IP may be blocked.
Will update here ASAP.

On another post, I found that there is some one mentioning this IP is not supported.  Is this still the case? As it looks like it should be covered by



Hey @Jging Fai Chong ,

The IP is still supported and, as you mentioned, is covered in the range provided in our official Bitbucket Cloud IP's documentation

Hi @Patrik S ,


My colleague which manages firewall could see the the traffic for passed through fine when I received "": dial tcp i/o timeout" from AWS COdeBuild.

He said it looks like is rejecting the request.

Are you able to assist?

Patrik S Atlassian Team Jan 17, 2023

Hello @Jging Fai Chong ,

I did some research on this error on the internet, and it seems to be related to your VPC configuration. I found the following post in another forum that might be of help:

If that does not help, I'd suggest reaching out to AWS support to check on your network configuration.

Thank you, @Jging Fai Chong .

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