# Mac OSX \`pfctl\` rule for Cyphal/UDP

**URL:** <https://forum.opencyphal.org/t/mac-osx-pfctl-rule-for-cyphal-udp/1908>\
**Category:** Applications & Usage\
**Created:** [June 11, 2023, 2:47am UTC](https://forum.opencyphal.org/t/mac-osx-pfctl-rule-for-cyphal-udp/1908 "2023-06-11T02:47:03Z")\
**Posts on this page:** 1\
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**Author:** ![erik.rainey](https://forum.opencyphal.org/user_avatar/forum.opencyphal.org/erik.rainey/32/20_2.png) [@erik.rainey](https://forum.opencyphal.org/u/erik.rainey)\
**Post date:** [June 11, 2023, 2:49am UTC](https://forum.opencyphal.org/t/mac-osx-pfctl-rule-for-cyphal-udp/1908/2 "2023-06-11T02:49:21Z")

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This also had some helpful debugging information but is a bit dated, so I don’t know if everything is still the same → [PF on Mac OS X – Thus Spake Manjusri](https://manjusri.ucsc.edu/2015/03/10/PF-on-Mac-OS-X/)

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