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This line

Comment: 

This line

sudo iptables-restore < /etc/iptables.rules

generates a warning about deprecated syntax. Modifying this line...

-A INPUT -i ! lo -d 127.0.0.0/8 -j REJECT

to this...
(just moving the ! before the -i)

-A INPUT ! -i lo -d 127.0.0.0/8 -j REJECT

appears to do the trick.