How do specify host for ZMQ?

[jldork]

When I run python -m ipykernel -f <connection file>, the ZMQ ports are bound on localhost. Is there any way to specify a different host?

I tried changing the IP key in the connection.json file, but it didn't work.

[takluyver]

The IP in the connection file is what clients use to connect. I think it's the nature of sockets that you can only bind on the machine you're running on. If you need the sockets exposed by another system, you'd need to set up some kind of forwarding. @minrk can tell you more.

[minrk]

Changing the IP in the connection file ought to work. What did you change it to and how did it fail?