FastNetMon could call notify script which calls when DDoS arrives. You could use it for integration with third-part applications or monitoring systems.
We use mail tool, please install it before:
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sudo apt-get install -y bsd-mailx |
Example script provided below will send email to address specified inside script:
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#!/usr/bin/env bash # This script will get following params: # $1 client_ip_as_string # $2 data_direction # $3 pps_as_string # $4 action (ban or unban) # # Please be carefult! You should not remove cat > # if [ "$4" = "unban" ]; then # No details arrived to stdin here # Unban actions if used exit 0 fi # # For ban and attack_details actions we will receive attack details to stdin # if option notify_script_pass_details enabled in FastNetMon's configuration file # # If you do not need this details, please set option notify_script_pass_details to "no". # # Please do not remove "cat" command if you have notify_script_pass_details enabled, because # FastNetMon will crash in this case (it expect read of data from script side). # if [ "$4" = "ban" ]; then cat | mail -s "FastNetMon Guard: IP $1 blocked because $2 attack with power $3 pps" $email_notify; # You can add ban code here! exit 0 fi if [ "$4" == "attack_details" ]; then cat | mail -s "FastNetMon Guard: IP $1 blocked because $2 attack with power $3 pps" $email_notify; exit 0 fi |
Please put it to file /usr/local/bin/notify_script.bash
And set executable bit for it:
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sudo chmod +x /usr/local/bin/notify_script.bash |
Then open example notify script with favourite editor and specify your email in field: “email_notify”.
Then try to run it manually for ban action:
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echo ban_details | /usr/local/bin/notify_script.bash 11.22.33.44 incoming 100500 ban |
And try to run it manually for unban (we do not have details in this case):
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/usr/local/bin/notify_script.bash 11.22.33.44 incoming 100500 unban |
You should receive example emails in both cases.
From FastNetMon side you need to apply following configuration:
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sudo fcli set main notify_script_enabled enable sudo fcli set main notify_script_path /usr/local/bin/notify_script.bash sudo fcli set main notify_script_format text sudo fcli commit |
Also, if you do not need any details about attack which FastNetMon provides to stdin, please disable this option and remove all lines where we use “cat”:
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sudo fcli set main notify_script_pass_details disable sudo fcli commit |