Sandeep B. Posted August 5, 2023 Share Posted August 5, 2023 CSF (ConfigServer Security & Firewall) is a popular firewall and security tool for Linux servers. CSF is full featured firewall which contains many features and works on Linux out of the box. Its a Stateful Packet Inspection (SPI) firewall, Login/Intrusion Detection and Security application for Linux servers. Here are some common commands that you can use with CSF: Start CSF: To start CSF, use the following command: csf -s you can also use systemctl to restart csf and lfd server systemctl start csf lfd Stop CSF: To stop CSF, use the following command: csf -x you can also use systemctl to restart csf and lfd server systemctl stop csf lfd Restart CSF: To restart CSF, use the following command: csf -r you can also use systemctl to restart csf and lfd server systemctl restart csf lfd Check CSF status: To check the status of CSF, use the following command: csf -status Allow an IP address: To allow an IP address through the firewall, use the following command: csf -a you can add the comment after the ip with space example : Quote csf -a 1.1.1.1 allowed by admin Unblock an IP address: To unblock an IP address that has been blocked by CSF, use the following command: csf -dr Block an IP address: To block an IP address, use the following command: csf -d you can add the comment after the ip with space example : Quote csf -d 1.1.1.1 blocked by admin View blocked IP addresses: To view a list of blocked IP addresses, use the following command: csf -g to find specific ip in blocked list use below command : Quote csf -g 1.1.1.1 Unblock all IP addresses: To unblock all IP addresses that have been blocked by CSF, use the following command: csf -df Check for updates to csf but do not upgrade : csf -c To update CSF : csf -u To Force update : csf -uf Get an IP’s information country of origin & hostname/ptr : csf -i IP usage : Quote csf -i 1.1.1.1 Hope this helped and you can add your own commands below in the comment to help others. Link to comment Share on other sites More sharing options...
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