Blocking ICMP Packet in Logsign

The most commonly used method in DOS Attack attacks is to send ICMP packets to the target system and make the system unable to respond after a while. You can block ICMP Packets on Logsign Server, and drop attacks before they reach you.

1- First of all connect to Logsign via cli.

2- Be root with sudo command.

# sudo bash

3-Add the following line to the sysctl.conf file.

# net.ipv4.icmp_echo_ignore_all = 1 net.ipv4.icmp_echo_ignore_broadcasts = 1

4- Execute following command and exit.

# sysctl -p

After these processes, Logsign will not accept the ICMP Packages that comes.

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