Tiny Core Linux

Tiny Core Base => TCB Q&A Forum => Topic started by: helander on August 10, 2009, 12:56:59 PM

Title: Connection refused
Post by: helander on August 10, 2009, 12:56:59 PM

I am trying to connect using telnet to a local application listening on port 5613.
If I connect using "telnet localhost 5613" it all works fine, but if I connect using
an IP address on one of the system's physical network interfaces
"telnet 192.168.0.11 5613" I get "connection refused".

Anyone have any idea of why and how to make connection via the physical interface address work.
The goal is to be able to connect from an external machine and trying that exposes the same refusal.

Kind Regards

Lars

Title: Re: Connection refused
Post by: danielibarnes on August 10, 2009, 01:22:04 PM

It sounds like the application is not bound to all interfaces. "netstat -l" should display something similar to the following:

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp        0      0 0.0.0.0:ssh   0.0.0.0:*       LISTEN

and you should see an entry for port 5613, with a local address of 0.0.0.0:5613.

Title: Re: Connection refused
Post by: helander on August 10, 2009, 01:53:50 PM

Under Local Address it says "box:5613", apart from that the other stuff is per your example.

Title: Re: Connection refused
Post by: danielibarnes on August 10, 2009, 02:04:59 PM

Quote

Under Local Address it says "box:5613"

This confirms the application is listening on the "localhost" interface. The application must be directed to bind to all interfaces when listening for a connection, and every application has a different way to do that.

Title: Re: Connection refused
Post by: helander on August 10, 2009, 02:26:05 PM

OK, thanks.