# Control Port: Usage

**URL:** <https://www.ruby-forum.com/t/control-port-usage/241294>\
**Category:** GNU Radio\
**Created:** [May 22, 2014, 12:49pm UTC](https://www.ruby-forum.com/t/control-port-usage/241294 "2014-05-22T12:49:48Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\
**Post date:** [May 22, 2014, 12:49pm UTC](https://www.ruby-forum.com/t/control-port-usage/241294/1 "2014-05-22T12:49:48Z")

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Hi to all.

I am a bit new to the usage of GNU Radio. I was trying to get Control  
Port  
working for my setup but faced an issue. While using Control Port, we  
have  
to provide an IP address and port as an argument. I have confusion  
regarding what the arguments should be.

Thanks in advance.

Shashank

---

<div class="post-metadata">

**Author:** ![Shashank\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/e0b2c6/32.png) [@Shashank\_S](https://www.ruby-forum.com/u/Shashank_S)\
**Post date:** [May 22, 2014, 3:25pm UTC](https://www.ruby-forum.com/t/control-port-usage/241294/2 "2014-05-22T15:25:12Z")

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On Thu, May 22, 2014 at 6:47 AM, Shashank S.  
[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)wrote:

> 

You just need to give it the IP address and port number as in  
“gr-ctrlport-monitor ipaddr port”.

When a Control Port-enabled application starts up, it will print out  
it’s  
list of endpoints that telli you what port is being used. Make sure  
you’ve  
taken care of any firewall issues, too. You can also set up an ICE  
configuration file to control your endpoints, but by default, the  
Control  
Port app will create an endpoint for each interface found on the machine  
using an ephemeral port.

See more here:

> **[GNU Radio Manual and C++ API Reference: ControlPort](https://www.gnuradio.org/doc/doxygen/page_ctrlport.html)**

Tom