How to configure mail address for CSF notification

To configure mail address for CSF notification

Introduction

ConfigServer Firewall (CSF) is a firewall application suite for Linux servers that helps manage and control network traffic, block suspicious IP addresses, and receive real-time alerts about potential threats.

Installation Steps:

Step 1: Check the OS version by using the below command

root@linuxhelp:~# lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 22.04.2 LTS
Release:	22.04
Codename:	jammy

Step 2: Check the status of the CSF and IFD service by using the below command

root@linuxhelp:~# systemctl status csf lfd
● csf.service - ConfigServer Firewall & Security - csf
     Loaded: loaded (/lib/systemd/system/csf.service; enabled; vendor preset: enabled)
     Active: active (exited) since Sun 2023-07-02 05:23:04 IST; 23min ago
   Main PID: 5507 (code=exited, status=0/SUCCESS)
        CPU: 595ms

Jul 02 05:23:04 linuxhelp systemd[1]: Starting ConfigServer Firewall & Security - csf...
Jul 02 05:23:04 linuxhelp csf[5507]: (restoring iptables) (restoring ip6tables)
Jul 02 05:23:04 linuxhelp systemd[1]: Finished ConfigServer Firewall & Security - csf.

● lfd.service - ConfigServer Firewall & Security - lfd
     Loaded: loaded (/lib/systemd/system/lfd.service; enabled; vendor preset: enabled)
     Active: active (running) since Sun 2023-07-02 05:23:05 IST; 23min ago
   Main PID: 5549 (lfd - sleeping)
      Tasks: 3 (limit: 4573)
     Memory: 298.5M
        CPU: 11.293s
     CGroup: /system.slice/lfd.service
             ├─5549 "lfd - sleeping"
             ├─6026 "lfd - (child) (PT) checking user processes"
             └─6187 /usr/sbin/sendmail -f root -t

Jul 02 05:44:09 linuxhelp sendmail[6114]: 3620E9Ef006114: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00>
Jul 02 05:44:09 linuxhelp sendmail[6164]: My unqualified host name (linuxhelp) unknown; sleeping for retry
Jul 02 05:45:09 linuxhelp sendmail[6164]: unable to qualify my own domain name (linuxhelp) -- using short name
Jul 02 05:45:09 linuxhelp sendmail[6164]: 3620F9cW006164: from=root, size=359, class=0, nrcpts=1, msgid=<202307020015.>
Jul 02 05:45:09 linuxhelp sendmail[6164]: 3620F9cW006164: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00>
Jul 02 05:45:09 linuxhelp sendmail[6175]: My unqualified host name (linuxhelp) unknown; sleeping for retry
Jul 02 05:46:09 linuxhelp sendmail[6175]: unable to qualify my own domain name (linuxhelp) -- using short name
Jul 02 05:46:09 linuxhelp sendmail[6175]: 3620G9fD006175: from=root, size=359, class=0, nrcpts=1, msgid=<202307020016.>
Jul 02 05:46:09 linuxhelp sendmail[6175]: 3620G9fD006175: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00>
Jul 02 05:46:09 linuxhelp sendmail[6187]: My unqualified host name (linuxhelp) unknown; sleeping for retry

Step 3: Add the mail id in the following line by using the below command

root@linuxhelp:~# vim /etc/csf/csf.conf
LF_ALERT_TO

Step 4: Restart the CSF and IFD service by using the below command

root@linuxhelp:~# systemctl restart csf lfd

Step 5: If you want to change the process time then search for the following line in the csf.conf file

root@linuxhelp:~# vim /etc/csf/csf.conf

Step 6: Restart the CSF and IFD by using the below command

root@linuxhelp:~# systemctl restart csf lfd

Conclusion:

By this how to configure mail address for CSF notification has come to an end.