Can't help you there.
There is another option you can explore.
To play on my home minecraft server from work, I used port mapping on my home router.
The way this works is it takes an external connection on a particular port, and then redirects it internally to the port you specify.
So in this case, you could redirect incoming port 443 on your home router/modem (Traditionally reserved for HTTPS, so your school will allow this traffic out) and have that map to incoming port 3000 (unsure which specifically is for Eco)
Still have your standard 3000-3001 mapping, but this port redirection as well.
Then at school:
<your IP address>:443