127.0.0.1 or localhost, from your perspective)
#AWS SSH TUNNEL PROXY PC#
This is the port that will be listening on your PC (i.e.It's worth breaking down what this does, with some notes: Instead, we're going to use Local Port tunneling, which looks a bit like this: ssh -L 999:127.0.0.1:3306 You may have used this prior with Dynamic Port Tunneling, where you do something like this: ssh -D 1080 configure 127.0.0.1:1080 as a SOCKS4 or SOCKS5 Proxy in your Firefox Browser like this:Īnd then you can browse some in your Firefox Browser as if you're controlling/appear to be the Internet-connected VM to upstream Servers/Systems. Which is where a handy feature of SSH comes in, where it has the ability to Tunnel. The ultimate goal is to enable SQL Developer on your PC to somehow speak to SQL Server ( TCP/3306) on 172.30.12.99. Has SSH Daemon/Server and SQL Server installed on it.No Public IP (not directly accessible from the Internet).This is not allowed to connect on SQL Database ( TCP/3306) to your 172.30.12.99 Database Server.This is allowed through an Internal Firewall to SSH to 172.30.12.99 (sourced from it's LAN Private IP of 172.30.12.6).Here's a more descriptive Network Diagram, showing more specifics around the issue, namely:
This pesky Server is what you'd like to access SQL Developer on, from your own PC. There you are with Internet access to an AWS EC2 instance, Azure Virtual Machine or VPS (Virtual Private Server) as we called them in the good old days, but beyond that - on a Private LAN of some sort (could be an AWS VPC, Azure VNET or Physical LAN) - there is another Server, which only has a Private IP Address.
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