/etc/sysctl.conf设置

# Controls IP packet forwarding

net.ipv4.ip_forward = 0

net.ipv4.ip_local_port_range = 1024 65000

# Controls source route verification

net.ipv4.conf.default.rp_filter = 1

 

# Do not accept source routing

net.ipv4.conf.default.accept_source_route = 0

 

# Controls the System Request debugging functionality of the kernel

kernel.sysrq = 0

 

# Controls whether core dumps will append the PID to the core filename

# Useful for debugging multi-threaded applications

kernel.core_uses_pid = 1

 

# Controls the use of TCP syncookies

net.ipv4.tcp_syncookies = 0

net.ipv4.tcp_tw_reuse = 1

net.ipv4.tcp_tw_recycle = 1

# Controls the maximum size of a message, in bytes

kernel.msgmnb = 65536

 

# Controls the default maxmimum size of a mesage queue

kernel.msgmax = 65536

 

# Controls the maximum shared segment size, in bytes

kernel.shmmax = 68719476736

 

# Controls the maximum number of shared memory segments, in pages

kernel.shmall = 4294967296