Hey everyone! I'm finishing up a training program for work, and I have one last design project focused on AWS. My networking skills are a bit shaky, and I'm struggling with routing. Specifically, I need to ping instances located in different accounts connected via a Transit Gateway (TGW), but I haven't even set up the firewall yet. I'm really just trying to get the routing right at this point. If anyone has some good video resources or guides for this setup, I'd really appreciate it! I've seen some that involve Palo Alto, but I'm not looking to buy a license just for training purposes.
1 Answer
First, check the routing tables for your instance. Make sure it has a route that points to the TGW where the other VPC or account is attached. Then, look at the associated routing table of the TGW attachment—does it include a route to your destination VPC? That should help you figure out if everything is connected correctly.
Thank you! That made me start working on a network diagram using Lucidchart, and I already spotted one mistake—I hadn't attached my target groups to the GWLB. I'm going to finish mapping out the rest of my accounts!