Remote debugging - how to create a port proxy?

Question

I'm trying to access remote debugging port running on box A (Debian) from box B (Windows). On box A I'm running Chrome with --remote-debugging-port=9222 flag and I can see that it works correctly (I can access localhost:9222 from another browser on A). Also, I'm sure that boxes A and B are connected because I can access :80 (apache) running on box A from box B just fine. Thing I need to do now is to allow box B access :9222 on box A. I've done research on port forwarding and iptables rules but I failed to make it work.

EDIT

Machine B is Windows so I'm not sure how to use ssh there, I found an app for port-forwarding that seems to work fine. It gives me an error though: "received a connection but can't connect to host-B:9222". So it looks like 9222 is not open for outside connections. Output from netstat on A gives me:

root@template:/home/developer# netstat -nap | grep 9222
tcp        0      0 127.0.0.1:9222      0.0.0.0:*    LISTEN      24300/user

score 8 · Accepted Answer · edited May 23 '17 at 12:14

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I found my answer here. Everything comes down to this:

open Chrome in one console: google-chrome --remote-debugging-port=9222
and set up a proxy in another one: ssh -L 0.0.0.0:9223:localhost:9222 localhost -N
now you should be able to access remote debugging from another machine via http://192.168.1.123:9223/

edited May 23 '17 at 12:14

Community

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answered Sep 05 '12 at 11:34

Konrad Dzwinel

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loislo · Answer 2 · 2012-08-23T18:07:24.243

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The browser binds socket to localhost address. That is why you have the problem with accessing to the port.

You can solve the problem with help of ssh port forwarding feature.

ssh user@host-A.example.org -L 9111:127.0.0.1:9222

After running this command please open localhost:9111 on host B

ssh will forward the connection to host A and connect it to localhost:9222

edited Aug 23 '12 at 18:07

answered Aug 23 '12 at 18:01

loislo

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Thanks for you answer, I made port forwarding running on B but it looks like port 9222 is not open for outside word on A. I've edited my question to include additional info. – Konrad Dzwinel Aug 24 '12 at 07:04

score 1 · Answer 3 · answered Sep 04 '12 at 17:58

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Another solution is to forward another port on the host A with help of nc

http://en.wikipedia.org/wiki/Netcat

answered Sep 04 '12 at 17:58

loislo

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Thanks again, clue about netcat was great. It allowed me to find this: http://stackoverflow.com/a/9269355/1143495 . – Konrad Dzwinel Sep 05 '12 at 11:25

Remote debugging - how to create a port proxy?

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