How to Install and Configure CSF on Rocky Linux 8.6

To Install And Configure CSF On Rocky Linux 8.6

Introduction:

CSF Stands for ConfigServer Firewall. CSF is a firewall software developed to keep your server safe. It comes with an advanced web-based interface to manage firewall settings.CSF includes other security features, including login/intrusion/flood detections.

Installation steps

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

[root@linuxhelp ~]# cat /etc/os-release 
NAME="Rocky Linux"
VERSION="8.6 (Green Obsidian)"
ID="rocky"
ID_LIKE="rhel centos fedora"
VERSION_ID="8.6"
PLATFORM_ID="platform:el8"
PRETTY_NAME="Rocky Linux 8.6 (Green Obsidian)"
ANSI_COLOR="0;32"
CPE_NAME="cpe:/o:rocky:rocky:8:GA"
HOME_URL="https://rockylinux.org/"
BUG_REPORT_URL="https://bugs.rockylinux.org/"
ROCKY_SUPPORT_PRODUCT="Rocky Linux"
ROCKY_SUPPORT_PRODUCT_VERSION="8"
REDHAT_SUPPORT_PRODUCT="Rocky Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="8"

Step 2: Now install the CSF Dependency by using the below command

[root@linuxhelp ~]# yum install perl-libwww-perl.noarch perl-Time-HiRes
Rocky Linux 8 - AppStream                                                   5.6 MB/s | 9.6 MB     00:01    
Rocky Linux 8 - BaseOS                                                      4.7 MB/s | 6.7 MB     00:01    
Rocky Linux 8 - Extras                                                      9.5 kB/s |  11 kB     00:01    
Dependencies resolved.
============================================================================================================
 Package                      Arch        Version                                      Repository      Size
============================================================================================================
Installing:
 perl-Time-HiRes              x86_64      4:1.9758-2.el8                               appstream       60 k
 perl-libwww-perl             noarch      6.34-1.module+el8.6.0+965+850557f9           appstream      211 k

Installing dependencies:
 perl-Compress-Raw-Bzip2      x86_64      2.081-1.el8                                  baseos          39 k
 perl-Compress-Raw-Zlib       x86_64      2.081-1.el8                                  baseos          67 k
 perl-Data-Dump               noarch      1.23-7.module+el8.6.0+965+850557f9           appstream       36 k
 perl-Digest-HMAC             noarch      1.03-17.module+el8.6.0+965+850557f9          appstream       19 k
 perl-Digest-SHA              x86_64      1:6.02-1.el8                                 appstream       65 k
 perl-Encode-Locale           noarch      1.05-10.module+el8.6.0+965+850557f9          appstream       21 k
 perl-File-Listing            noarch      6.04-17.module+el8.6.0+965+850557f9          appstream       17 k
 perl-HTML-Parser             x86_64      3.72-15.module+el8.6.0+965+850557f9          appstream      118 k
 perl-HTML-Tagset             noarch      3.20-34.module+el8.6.0+965+850557f9          appstream       23 k
 perl-HTTP-Cookies            noarch      6.04-2.module+el8.6.0+965+850557f9           appstream       38 k
 perl-HTTP-Date               noarch      6.02-19.module+el8.6.0+965+850557f9          appstream       18 k
 perl-HTTP-Message            noarch      6.18-1.module+el8.6.0+965+850557f9           appstream       99 k
 perl-HTTP-Negotiate          noarch      6.01-19.module+el8.6.0+965+850557f9          appstream       21 k
 perl-IO-Compress             noarch      2.081-1.el8                                  baseos         257 k
 perl-IO-HTML                 noarch      1.001-11.module+el8.6.0+965+850557f9         appstream       27 k
 perl-LWP-MediaTypes          noarch      6.02-15.module+el8.6.0+965+850557f9          appstream       28 k
 perl-NTLM                    noarch      1.09-17.module+el8.6.0+965+850557f9          appstream       23 k
 perl-Net-HTTP                noarch      6.17-2.module+el8.6.0+965+850557f9           appstream       42 k
 perl-TimeDate                noarch      1:2.30-15.module+el8.6.0+965+850557f9        appstream       52 k


 perl-Try-Tiny                noarch      0.30-7.module+el8.6.0+965+850557f9           appstream       44 k
 perl-WWW-RobotRules          noarch      6.02-18.module+el8.6.0+965+850557f9          appstream       22 k

Step 3: Download the CSF package by using the below command

[root@linuxhelp Downloads]# wget https://download.configserver.com/csf.tgz
--2022-08-31 17:54:02--  https://download.configserver.com/csf.tgz
Resolving download.configserver.com (download.configserver.com)... 94.130.90.175
Connecting to download.configserver.com (download.configserver.com)|94.130.90.175|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2283647 (2.2M) [application/x-gzip]
Saving to: ‘csf.tgz’

csf.tgz                    100%[========================================>]   2.18M  2.04MB/s    in 1.1s    

2022-08-31 17:54:04 (2.04 MB/s) - ‘csf.tgz’ saved [2283647/2283647]

Step4: Extract the download Package by using the below command

[root@linuxhelp Downloads]# tar -xvf csf.tgz
csf/
csf/ConfigServer/
csf/ConfigServer/AbuseIP.pm
csf/ConfigServer/CheckIP.pm
csf/ConfigServer/CloudFlare.pm
csf/ConfigServer/Config.pm
csf/ConfigServer/cseUI.pm
csf/ConfigServer/DisplayResellerUI.pm
csf/ConfigServer/DisplayUI.pm
csf/ConfigServer/GetEthDev.pm
csf/ConfigServer/GetIPs.pm
csf/ConfigServer/KillSSH.pm
csf/ConfigServer/Logger.pm
csf/ConfigServer/LookUpIP.pm

Step 5: Change the directory CSF by using the below command

[root@linuxhelp Downloads]# cd csf

Step 6: Now install the CSF using shell script by using the below command

[root@linuxhelp csf]# sh install.sh 
Selecting installer...
Running csf generic installer
Installing generic csf and lfd
Check we're running as root
mkdir: created directory '/etc/csf'
'install.txt' -> '/etc/csf/install.txt'
Checking Perl modules...
Using configuration defaults
...Perl modules OK

mkdir: cannot create directory ‘/etc/csf’: File exists
mkdir: created directory '/var/lib/csf'
mkdir: created directory '/var/lib/csf/backup'
mkdir: created directory '/var/lib/csf/Geo'
mkdir: created directory '/var/lib/csf/ui'
mkdir: created directory '/var/lib/csf/stats'
mkdir: created directory '/var/lib/csf/lock'
mkdir: created directory '/var/lib/csf/webmin'
mkdir: created directory '/var/lib/csf/zone'
mkdir: created directory '/usr/local/csf'
mkdir: created directory '/usr/local/csf/bin'
mkdir: created directory '/usr/local/csf/lib'
mkdir: created directory '/usr/local/csf/tpl'
'csf.generic.conf' -> '/etc/csf/csf.conf'
'csf.generic.allow' -> '/etc/csf/csf.allow'
'csf.deny' -> '/etc/csf/./csf.deny'
'csf.redirect' -> '/etc/csf/./csf.redirect'
'csf.resellers' -> '/etc/csf/./csf.resellers'

Step 7: Disable the firewalld Services by using the below command

[root@linuxhelp csf]# systemctl disable firewalld
Unit /etc/systemd/system/firewalld.service is masked, ignoring.

Step 8: Stop the Firewalld Services by using the below command

[root@linuxhelp csf]# systemctl stop firewalld

Step 9: Change the following directory by using the below command

[root@linuxhelp csf]# cd /usr/local/csf/bin/

Step 10: Run the command to check CSF working or not by using the below command

[root@linuxhelp bin]# perl csftest.pl 
Testing ip_tables/iptable_filter...OK
Testing ipt_LOG...OK
Testing ipt_multiport/xt_multiport...OK
Testing ipt_REJECT...OK
Testing ipt_state/xt_state...OK
Testing ipt_limit/xt_limit...OK
Testing ipt_recent...OK
Testing xt_connlimit...OK
Testing ipt_owner/xt_owner...OK
Testing iptable_nat/ipt_REDIRECT...OK
Testing iptable_nat/ipt_DNAT...OK

RESULT: csf should function on this server

Step 11: Change Testing “1” to Testing “0” in configuration by using the below command

[root@linuxhelp bin]# vim /etc/csf/csf.conf

Step 12: Enable the both CSF and IFD Services by using the below command

[root@linuxhelp bin]# systemctl enable csf lfd

Step 13: Start the both CSF and IFD Services by using the below command

[root@linuxhelp bin]# systemctl start csf.service lfd.service

Step 14: Start the CSF by using the below command

[root@linuxhelp bin]# csf -s
Flushing chain `INPUT'
Flushing chain `FORWARD'
Flushing chain `OUTPUT'
Flushing chain `LOGDROPIN'
Flushing chain `LOGDROPOUT'
Flushing chain `DENYIN'
Flushing chain `DENYOUT'
Flushing chain `ALLOWIN'
Flushing chain `ALLOWOUT'
Flushing chain `LOCALINPUT'
Flushing chain `LOCALOUTPUT'

Step 15: Allow the IP using CSF by using the below command

[root@linuxhelp bin]# csf -a 192.168.6.110
Adding 192.168.6.110 to csf.allow and iptables ACCEPT...
ACCEPT  all opt -- in !lo out *  192.168.6.110  -> 0.0.0.0/0  
ACCEPT  all opt -- in * out !lo  0.0.0.0/0  -> 192.168.6.110  

Step 16: Check the allowed IP list by using the below command

[root@linuxhelp bin]# vim /etc/csf/csf.allow

Step 17: Remove the allowed from CSF by using the below command

[root@linuxhelp bin]# csf -ar 192.168.6.110
Removing rule...
ACCEPT  all opt -- in !lo out *  192.168.6.110  -> 0.0.0.0/0  
ACCEPT  all opt -- in * out !lo  0.0.0.0/0  -> 192.168.6.110  

Step 18: Deny the IP using CSF by using the below command

[root@linuxhelp bin]# csf -d 192.168.6.120
Adding 192.168.6.120 to csf.deny and iptables DROP...
DROP  all opt -- in !lo out *  192.168.6.120  -> 0.0.0.0/0  
LOGDROPOUT  all opt -- in * out !lo  0.0.0.0/0  -> 192.168.6.120  

Step 19: Check the deny IP list by using the below command

[root@linuxhelp bin]# vim /etc/csf/csf.deny

Step 20: Remove the deny IP using CSF by using the below command

[root@linuxhelp bin]# csf -dr 192.168.6.120
Removing rule...
DROP  all opt -- in !lo out *  192.168.6.120  -> 0.0.0.0/0  
LOGDROPOUT  all opt -- in * out !lo  0.0.0.0/0  -> 192.168.6.120  

Step 21: Restart the CSF by using the below command

[root@linuxhelp bin]# csf -r 
Flushing chain `INPUT'
Flushing chain `FORWARD'
Flushing chain `OUTPUT'
Flushing chain `LOGDROPIN'
Flushing chain `LOGDROPOUT'
Flushing chain `DENYIN'
Flushing chain `DENYOUT'
Flushing chain `ALLOWIN'
Flushing chain `ALLOWOUT'
Flushing chain `LOCALINPUT'
Flushing chain `LOCALOUTPUT'
Flushing chain `INVDROP'
Flushing chain `INVALID'
Deleting chain `LOGDROPIN'

Conclusion:

We have reached the end of this article. In this guide, we have walked you through the steps required to Install and configure CSF on Rocky Linux 8.6. Your feedback is much welcome.