长话短说。
Apache2 在 0.0.0.0:80 上运行
mysqld 运行在 0.0.0.0:3306
无法从本地主机访问这些端口，但可以从远程主机访问它们。
从远程主机（笔记本电脑）
MacBook-Pro:~ codemaster$ telnet 192.168.0.10 3306
Trying 192.168.0.10...
Connected to 192.168.0.10.
Escape character is '^]'.
T
5.5.40-0+wheezy1/QmQ,%uA?0b|m+.BDn|G*mysql_native_password^CConnection closed by foreign host.
MacBook-Pro:~ codemaster$ telnet 192.168.0.10 80
Trying 192.168.0.10...
Connected to 192.168.0.10.
Escape character is '^]'.
来自本地主机 (192.168.0.10)
root@udoo-debian-hfp:/# uname -a
Linux udoo-debian-hfp 3.0.35 #1 SMP PREEMPT Mon Mar 3 15:17:07 CET 2014 armv7l GNU/Linux
root@udoo-debian-hfp:/# netstat -a -n -p|grep 3306
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 21469/mysqld
root@udoo-debian-hfp:/# netstat -a -n …debian ×1