Can't connect to mysql aws RDS - 10060 odbc logged error

I'm trying to debug an ODBC connection failing to a MySQL instance on aws rds. The connection works on all but a single machine. This machine is connected to large financial systems network, so I assume it would be the firewall.

So far, I've..

• made rds instance public accessable
• whitelisted the machine's IP
• had their network folks open port 3306 on machine.
• network folks confirmed data is going out port 3306, but nothing is coming back.
• traced on machine's odbc log...10060 error (usually inbound rule to RDS error..)
• opened ALL inbound to RDS to accept from all (0.0.0.0/0 ) - still get error
• setup the RDS instance error log, but doesn't record these failed connects. It seems to only log if it is a user/password fail..?

my questions:

• is there an aws rds log that would show these failed attempts?
• does windows firewall on port 3306 also need an inbound rule? Or does opening it assume inbound/outbound?

Again - all the other machines are able to access the rds mysql fine. Only this one can not connect - and i am sure it's very protected, due to its access to major financial systems.

any ideas what else I can try?

thanks!

So I believe the issue is that on firewall setup, they are allowing incoming on 3306 only if its a secured connection (using ipSec I believe). i'll likely need to look into a vpn to connect to AWS rds.