Miscellany

filter
#  Allows all loopback (lo0) traffic and drop all traffic to 127/8 that doesnot use lo0
        -A INPUT -i lo -j ACCEPT
        -A INPUT -i ! lo -d 127.0.0.0/8 -j REJECT
#  Accepts all established inbound connections
        -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
#  Allows all outbound traffic
#  You can modify this to only allow certain traffic
        -A OUTPUT -j ACCEPT
# Allows HTTP and HTTPS connections from anywhere (the normal ports for websites)
        -A INPUT -p tcp --dport 80 -j ACCEPT
        -A INPUT -p tcp --dport 443 -j ACCEPT
#  Allows SSH connections
# THE -dport NUMBER IS THE SAME ONE YOU SET UP IN THE SSHD_CONFIG FILE
        -A INPUT -p tcp -m state --state NEW --dport ssh -j ACCEPT
# Allow ping
        -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT
# log iptables denied calls
        -A INPUT -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7
# Reject all other inbound - default deny unless explicitly allowed policy
        -A INPUT -j REJECT
        -A FORWARD -j REJECT

COMMIT


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Note: I get this error when i run iptables-restore  "see below"

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debian:/# iptables-restore /etc/iptables.test.rules

debian:~# iptables-restore /etc/iptables.test.rules
iptables-restore: line 25 failed

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debian:~# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     0    --  anywhere             anywhere
REJECT     0    --  anywhere             loopback/8          reject-with icmp-port-unreachable
ACCEPT     0    --  anywhere             anywhere            state RELATED,ESTABLISHED
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:www
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:https
ACCEPT     tcp  --  anywhere             anywhere            state NEW tcp dpt:ssh
ACCEPT     icmp --  anywhere             anywhere            icmp echo-request
LOG        0    --  anywhere             anywhere            limit: avg 5/min burst 5 LOG level debug prefix `iptables denied: '
REJECT     0    --  anywhere             anywhere            reject-with icmp-port-unreachable

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination
REJECT     0    --  anywhere             anywhere            reject-with icmp-port-unreachable

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     0    --  anywhere             anywhere

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