linux系统加固(15)

net.ipv4.tcp_fin_timeout = 15

# Decrease the time default value for tcp_keepalive_time connection

net.ipv4.tcp_keepalive_time = 1800

# Turn off the tcp_window_scaling

net.ipv4.tcp_window_scaling = 0

# Turn off the tcp_sack

net.ipv4.tcp_sack = 0

# Turn off the tcp_timestamps

net.ipv4.tcp_timestamps = 0

# Enable TCP SYN Cookie Protection

net.ipv4.tcp_syncookies = 1

# Enable ignoring broadcasts request

net.ipv4.icmp_echo_ignore_broadcasts = 1

# Enable bad error message Protection

net.ipv4.icmp_ignore_bogus_error_responses = 1

# Log Spoofed Packets, Source Routed Packets, Redirect Packets

net.ipv4.conf.all.log_martians = 1

# Set maximum amount of memory allocated to shm to 256MB

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