linux – 安全的互联网访问NAS

如果可以的话,把它放在防火墙后面(IPCop是一个不错的选择),只启用你需要的协议(我建议通过非标准端口使用FTP或SFTP).如果你不能在这里是一个iptables样本配置,你可以在同一个盒子上使用(例如保存到/etc/iptables.up.rules)：

*filter

#  Allows all loopback (lo0) traffic and drop all traffic to 127/8 that doesn't 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 FTP from anywhere (modify port as necessary,or add more services)
-A INPUT -p tcp --dport 21 -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 22 -j ACCEPT

# Allow ping (not necessary)
-A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT

# Reject all other inbound - default deny unless explicitly allowed policy
-A INPUT -j REJECT
-A FORWARD -j REJECT

COMMIT

要使用它：

$iptables-restore < /etc/iptables.up.rules

要在网络上自动加载规则,请在环回定义(Debian / Ubuntu上的/ etc / network / interfaces)之后将以下内容添加到网络配置文件中：

pre-up iptables-restore < /etc/iptables.up.rules