# Explicitly Constraining Which Network Interfaces Are Used

**URL:** <https://discourse.openrobotics.org/t/explicitly-constraining-which-network-interfaces-are-used/5652>\
**Category:** ROS General\
**Tags:** ros2\
**Created:** [August 7, 2018, 4:34pm UTC](https://discourse.openrobotics.org/t/explicitly-constraining-which-network-interfaces-are-used/5652 "2018-08-07T16:34:53Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![nathan.jackson](https://avatars.discourse-cdn.com/v4/letter/n/45deac/32.png) [@nathan.jackson](https://discourse.openrobotics.org/u/nathan.jackson)\
**Post date:** [August 7, 2018, 4:34pm UTC](https://discourse.openrobotics.org/t/explicitly-constraining-which-network-interfaces-are-used/5652/1 "2018-08-07T16:34:53Z")

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In raw dds, specifically for coredx, there is a way to give an interfaces list to the domain participant so that it will only talk on those network interfaces. Is there a way to use that through ros2?

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**Author:** ![mkhansen](https://sea2.discourse-cdn.com/flex022/user_avatar/discourse.openrobotics.org/mkhansen/32/3748_2.png) [@mkhansen](https://discourse.openrobotics.org/u/mkhansen)\
**Post date:** [August 7, 2018, 6:21pm UTC](https://discourse.openrobotics.org/t/explicitly-constraining-which-network-interfaces-are-used/5652/2 "2018-08-07T18:21:47Z")

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Nathan,  
You might want to ask this on [answers.ros.org](http://answers.ros.org), I think.

Matt

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**Author:** ![nathan.jackson](https://avatars.discourse-cdn.com/v4/letter/n/45deac/32.png) [@nathan.jackson](https://discourse.openrobotics.org/u/nathan.jackson)\
**Post date:** [August 7, 2018, 7:23pm UTC](https://discourse.openrobotics.org/t/explicitly-constraining-which-network-interfaces-are-used/5652/3 "2018-08-07T19:23:48Z")

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Thanks Matt. I asked it there as well.

[https://answers.ros.org/question/299941/explicitly-constraining-which-network-interfaces-are-used/](https://answers.ros.org/question/299941/explicitly-constraining-which-network-interfaces-are-used/)

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**Author:** ![tfoote](https://sea2.discourse-cdn.com/flex022/user_avatar/discourse.openrobotics.org/tfoote/32/3813_2.png) [@tfoote](https://discourse.openrobotics.org/u/tfoote)\
**Post date:** [August 7, 2018, 8:23pm UTC](https://discourse.openrobotics.org/t/explicitly-constraining-which-network-interfaces-are-used/5652/4 "2018-08-07T20:23:25Z")

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