我在 Ubuntu 12.04 LTS 中安装了 Artillery。我已启动 artillary 并启动了该服务
service artillery start
当我在做的时候
netstat -nltp | grep LISTEN
SSH 端口号为何得不到炮火保护？
root@ubuntu:~# service artillery start
Starting Artillery... Ok
root@ubuntu:~# netstat -nltp | grep LISTEN
tcp 0 0 0.0.0.0:110 0.0.0.0:* LISTEN 1335/dovecot
tcp 0 0 0.0.0.0:143 0.0.0.0:* LISTEN 1335/dovecot
tcp 0 0 0.0.0.0:10000 0.0.0.0:* LISTEN 2657/perl
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1970/apache2
tcp 0 0 XXX.XXX.XXX.XXX:53 0.0.0.0:* LISTEN 1377/named
tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN 1377/named
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 636/sshd
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 998/cupsd
tcp 0 0 127.0.0.1:953 0.0.0.0:* LISTEN 1377/named
tcp 0 0 0.0.0.0:993 0.0.0.0:* LISTEN 1335/dovecot
tcp 0 0 0.0.0.0:995 0.0.0.0:* LISTEN 1335/dovecot
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 1749/mysqld
tcp6 0 0 :::110 :::* LISTEN 1335/dovecot
tcp6 0 0 :::143 :::* LISTEN 1335/dovecot
tcp6 0 0 :::53 :::* LISTEN 1377/named
tcp6 0 0 :::22 :::* LISTEN 636/sshd
tcp6 0 0 ::1:631 :::* LISTEN 998/cupsd
tcp6 0 0 ::1:953 :::* LISTEN 1377/named
tcp6 0 0 :::993 :::* LISTEN 1335/dovecot
tcp6 0 0 :::995 :::* LISTEN 1335/dovecot
root@ubuntu:~#
我可以知道为什么以及如何保护 SSH 端口火炮吗？