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cs50 / ide

https://cs50.readthedocs.io/ide
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networking? #65

Closed pazz closed 3 years ago

pazz commented 3 years ago

This is probably more an issue with your AWS settings and not the IDE image itself but I'm never sure where to ask technical questions about CS50 tools..

I noticed that in the terminal of ide.cs50.io pretty much all outgoing network traffic except on port 80 is blocked (for good reasons I know). Question: are there any other exceptions?

I would love to set an exercise where students write some sort of chat client and the easiest way to do this would be to connect to some existing XMPP / IRC / Discord server. Any ideas how this could technically work from within the web IDE? Cheers!

kzidane commented 3 years ago

What egress port are you trying to use?

pazz commented 3 years ago

So far I have tried to connect to a XMPP server on port 5222 as well as some private webserver at port 8123. I don't know what egress is, sorry.

kzidane commented 3 years ago

No worries. Egress just means outgoing/outbound. Can these be proxied over 443 by chance (i.e., have a proxy server that listens on 443 and forwards traffic to these ports)?

pazz commented 3 years ago

Oh I see. That port is simply not blocked for outgoing traffic? Good to know. Yes, I could probably set something like that up (but then I could also use port 80 right?). I was hoping to directly connect to some official server on their port, e.g. 5222 for jabber.

If you know if some other chat service that is still not blocked from the IDE image please let me know. Otherwise please just close this issue. I understand that you want to limit network traffic.

kzidane commented 3 years ago

No, 443 and 80 should be open, so you should be able to use either or both. I also just opened outgoing 5222 for you. Let me know if you need anything else!