matthewjumpsoffbuildings

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sudo nano /etc/default/ufw
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 # Set to yes to apply rules to support IPv6 (no means only IPv6 on loopback
 # accepted). You will need to 'disable' and then 'enable' the firewall for
 # the changes to take affect.
+IPV6=no
 
 # Set the default input policy to ACCEPT, ACCEPT_NO_TRACK, DROP, or REJECT.