I'm trying to connect to a server that is used by a few of my friends. The server runs off FTB Direwolf. When I try to connect to the server (using an external IP address), the response from my computer says:
Internal Exception: java.io.IOException: An established connection was aborted by the software in your host machine
I have tried looking at my firewall settings, reinstalled Minecraft, and made sure everything I have is up to date. Any suggestions on how to fix this error?