We have several LTI tools that work fine on one server. Recently I've tried to install them on another server that is behind a firewall. When I use the URL form and click "Submit," nothing happens. When I install with the "Paste XML" method, it installs, but then when I launch the tool I get a 500 error.
It looks like Canvas is trying to ping the URLs before install and launch. I understand the security rationale, and I can request that we open ports on that server to the Canvas subnet, but I would like to confirm that this is what is happening.
Thanks in advance!