# Tcp port to Allen Bradley Controllogix

**URL:** <https://forum.inductiveautomation.com/t/tcp-port-to-allen-bradley-controllogix/7036>\
**Category:** General Discussion\
**Created:** [August 14, 2013, 10:29am UTC](https://forum.inductiveautomation.com/t/tcp-port-to-allen-bradley-controllogix/7036 "2013-08-14T10:29:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![BSH](https://avatars.discourse-cdn.com/v4/letter/b/c68b51/32.png) [@BSH](https://forum.inductiveautomation.com/u/BSH)\
**Post date:** [August 14, 2013, 10:29am UTC](https://forum.inductiveautomation.com/t/tcp-port-to-allen-bradley-controllogix/7036/1 "2013-08-14T10:29:13Z")

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I need to create some rules in our firewall and I want to prepare for an Allen Bradley PLC that will be installed soon. To connect to Siemens S7 PLC’s I need to open up port 102 on the firewall but which port do I need to open to communicate with Allen Bradley Controllogix PLC’s?

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**Author:** ![george](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/george/32/14066_2.png) [@george](https://forum.inductiveautomation.com/u/george)\
**Post date:** [August 14, 2013, 11:24am UTC](https://forum.inductiveautomation.com/t/tcp-port-to-allen-bradley-controllogix/7036/2 "2013-08-14T11:24:06Z")

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I believe you want ports 2222 and 44818 although it’s not something I’ve ever needed to do myself.