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Jul 20, 2018 at 16:00 comment added Agostino And if you have firewalld, it's simpler firewall-cmd --query-port=port/protocol, e.g. firewall-cmd --query-port=80/tcp.
Feb 18, 2015 at 13:32 history edited HopelessN00b CC BY-SA 3.0
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Feb 18, 2015 at 13:32 history wiki removed HopelessN00b
Sep 7, 2011 at 17:57 history answered user9517 CC BY-SA 3.0