Firewall: ConfigServer Security & Firewall(CSF)

安裝 CSF

yum install wget vim perl-libwww-perl.noarch perl-Time-HiRes

cd /usr/src/
wget https://download.configserver.com/csf.tgz

tar -xzf csf.tgz
cd csf
sh install .sh

輸出

...
...
‘csf/jquery.min.js’ -> ‘webmin/csf/images/jquery.min.js’
‘csf/LICENSE.txt’ -> ‘webmin/csf/images/LICENSE.txt’
‘csf/loader.gif’ -> ‘webmin/csf/images/loader.gif’
‘/etc/csf/csfwebmin.tgz’ -> ‘/usr/local/csf/csfwebmin.tgz’

Installation Completed

測試指令

cd /usr/local/csf/bin/
perl csftest.pl

輸出

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

設定 CSF

Stop the firewalld

systemctl stop firewalld
systemctl disable firewalld

cd /etc/csf/
vim csf.conf

將 TESTING 改成 0，以及確定 TCP_IN 有包含到實際 SSH 的通訊埠。

...
TESTING = "0"
...
TCP_IN = "20,21,22,25,53,80,110,143,443,465,587,993,995"

啟動 CSF & LFD

systemctl start csf
systemctl start lfd

systemctl enable csf
systemctl enable lfd

CSF 基本指令