Share folders between two EC2 instances within the same VPC

Question

I have a number of Windows servers in EC2 on the same VPC.  How can I get those machines to share folders with each other?
The closest answer I see is here: Unable to Share Data between Amazon EC2 Instances for Windows
But it's a pretty old post and I cannot get it to work by simply enabling TCP and UDP on ports 135-139 and 445.
I want to be able to say \server1shared_folder from my server2 machine.

asmath · Answer

You can simply create a security group and then add an inbound rule to allow all traffic from it's own security group and then add these security group in both instances to share data with each other but there's an better approach for this is to use FSx in AWS.

Daniel Williams · Answer

Ok, here is what to set, and seems to be the only thing needed.  Add a security group with one rule for each server, each allowing all traffic on all ports.
So in the screenshot below I have 3 servers, and 3 rules.   I give this security group to all three servers and now they can share files.
I could not get this to work just using the TCP/UDP 445, 135-139.  So some protocol/port must have been missing.

Share folders between two EC2 instances within the same VPC

2 Answers

Add your own answers!

Ask a Question