ubuntu 禁止ping
禁止:echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all
开启:echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all
vi /etc/rc.local
把 echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all 添加到/etc/rc.local 里
报错信息中隐藏服务器apache敏感信息
vi /etc/apache2/apache2.conf 加上 ServerTokens Prod
vi /etc/apache2/conf-available/security.conf
# where Full conveys the most information, and Prod the least.
ServerTokens Minimal
#ServerTokens OS
#ServerTokens Full
# Set to one of: On | Off | EMail
ServerSignature Off
#ServerSignature On
标红的注释掉 , 标绿的放行。