First of all, once I am logged in I can load the rules manually just fine, by typing
sudo iptables-restore < /etc/iptables.new
And the rule then appears on
sudo iptables -L
But I can't make it load automatically no matter what. In /etc/network/interfaces I have this:
auto eth0 inet dhcp
adress 192.168.56.101
netmask 255.255.255.0
pre-up iptables-restore < /etc/iptables.new
Rules in iptables.new are:
Generated By iptables-save v1.4.12 on Sun Jul 7 15:28:14 2013
*filter
:INPUT ACCEPT [4:824]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
COMMIT
# Completed on Sun Jul 7 7 15:28:14 2013
What I usually do is this: