# Centos 7 - Docker and FirewallD

**URL:** <https://meta.discourse.org/t/centos-7-docker-and-firewalld/32045>\
**Category:** Self-hosting\
**Tags:** docker, email\
**Created:** [13 באוגוסט,‏ 2015,‏ 12:29am UTC](https://meta.discourse.org/t/centos-7-docker-and-firewalld/32045 "2015-08-13T00:29:10Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![AstonJ](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/astonj/32/215041_2.png) [@AstonJ](https://meta.discourse.org/u/AstonJ)\
**Post date:** [15 באוגוסט,‏ 2015,‏ 12:12pm UTC](https://meta.discourse.org/t/centos-7-docker-and-firewalld/32045/6 "2015-08-15T12:12:58Z")

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Why didn’t just opening the SMTP port work? (You need to restart Docker after starting FirewallD)

_I did not need to do any of those steps in your posts._

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