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Default ufw rules
Having just spun up the docker on 16:04 image. There is a notification upon login suggesting we enable the ufw firewall rules.
The default rules are set as
[ 1] 22 LIMIT IN Anywhere
[ 2] 2375/tcp ALLOW IN Anywhere
[ 3] 2376/tcp ALLOW IN Anywhere
[ 4] 22 (v6) LIMIT IN Anywhere (v6)
[ 5] 2375/tcp (v6) ALLOW IN Anywhere (v6)
[ 6] 2376/tcp (v6) ALLOW IN Anywhere (v6)
I understand that 22 is required for ssh however what are ports 2375 & 2376 used for?
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