# URSim Ethernet/IP Connection

**URL:** <https://forum.universal-robots.com/t/ursim-ethernet-ip-connection/17631>\
**Category:** Technical Questions\
**Created:** [November 16, 2021, 12:36pm UTC](https://forum.universal-robots.com/t/ursim-ethernet-ip-connection/17631 "2021-11-16T12:36:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![peter.gent](https://avatars.discourse-cdn.com/v4/letter/p/a4c791/32.png) [@peter.gent](https://forum.universal-robots.com/u/peter.gent)\
**Post date:** [November 16, 2021, 12:36pm UTC](https://forum.universal-robots.com/t/ursim-ethernet-ip-connection/17631/1 "2021-11-16T12:36:10Z")

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Hi there, we have a Linux machine with URSim 5.11 and I’m trying to establish an Ethernet/IP connection (via the simulator) to a PLC. However, when I select enable on the Ethernet/IP setup, the simulator just says, “Not running”.

So… is there anyway for the simulator to establish an Ethernet/IP connection to another device?

Thank you,

Peter

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**Author:** ![anon91182187](https://avatars.discourse-cdn.com/v4/letter/a/8797f3/32.png) [@anon91182187](https://forum.universal-robots.com/u/anon91182187)\
**Post date:** [November 19, 2021, 4:09pm UTC](https://forum.universal-robots.com/t/ursim-ethernet-ip-connection/17631/2 "2021-11-19T16:09:26Z")

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Hi…I accept the primary issue is the firewall impeding correspondences. At the point when you associate with a UR robot, your PC needs to build up a TCP/IP server.

I woud prescribe you to run RoboDK as executive and cripple your firewall to check whether you can make it work.

Additionally, would you be able to have a go at changing the port? For instance, utilize 20100 rather than 30000.