Prevent SYN attacks and ‘ping’ in Linux

Information, Linux, Network, Security 1 Minute

# echo 1 > /proc/sys/net/ipv4/tcp_syncookies

Disable ping
# echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all

Disable multicast broadcast ping
# echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts

To enable again, use echo 0 in place of echo 1

Published by Geetu R. Vaswani

Published