Skip to main content

Posts

CWP : How to Enable PORTFLOOD Protection using CSF firewall?

There is no practical way to actually prevent Dos / DDoS attacks, because your server is connected to the internet. When you are connected to the internet, even with a simple local PC computer you are exposed to remote attacks. The only thing you can do is to mittigate its effects.

When you are under ddos and trying to mitigate the attack, the server will not respond normally, it will get slower than usual, it can often appear down temporary while the attack is decreasing. On large-volume attacks your provider can even null-route the server IP address to avoid from overload their entire network.
Can CSF firewall help me to stop only small / medium attacks? Why not large attacks? Beacuse of the way DDOS works. For very large and distributed attacks, you must use a dedicated firewall, or an specialized antiddos shield that works on network level inside the datacenter where you are hosted, or you can use 3rd party anti-ddos services like Cloudflare, Incapsula or Level3 AntiDDOS services.

Recent posts

CWP : How Configure DDOS Prevention Settings in CSF firewall ?

Denial of Service (DoS) and Distributed Denial of Service (DDoS) attacks are common threats that every publicly accessible web server faces. The purpose of such attacks, in simplest terms, is to flood a server with connections, overloading it and preventing from accepting legitimate traffic.
Step #1: SYNflood Protection A SYNflood attack is a DoS attack exploiting the TCP (Transmission Control Protocol) connection process itself. In basic terms, a TCP connection is established using a three-way handshake:
The client (incoming connection) sends a synchronization packet (SYN) to the server.The server responds with a synchronization acknowledgement (SYN/ACK) to the client.The client then responds with an acknowledgement (ACK) back to the server. A SYNflood attack manipulates that three-way handshake by initiating multiple synchronization requests and then refusing to respond with any final acknowledgements. On a Linux server, you can quickly check for SYN packets by running this command o…

CWP : How to Blocking Access to Specific Ports for Specific Countries ?

Restricting access by port to IP addresses originating in a specific country or countries can be an effective way to help minimize the negative performance impact that country-level blocking can bring. In this example, we’re blocking access to the FTP Ports (20,21) & SMTP Ports(25,110,143,465,587,993,995)  to IP addresses originating in Belgium & Bulgaria.
Step #1: Specify the Country or Countries to be Denied Scroll down to the Country Code Lists and Settings section and add the country code to CC_DENY_PORTS. Multiple countries can be comma separated with no spaces in between, and you can find a list of ISO 3166-1 alpha-2 codes at https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2.
List the port that will be blocked in the specified country in the CC_DENY_PORTS_TCP and CC_DENY_PORTS_UDP fields.
Step #2: Save Your Changes and Restart the Firewall Scroll to the bottom of the Firewall Configuration page and click on the Change button.
On the next screen, click the Restart csf+lfd …

CWP : How to Allowing Access to Specific Ports for Specific Countries ?

I have some listed ports for my services management and I want that listed ports only accessible from my country. Yes, you can choose to allowing incoming traffic by port to only a specific country or countries. Generally, this should be a better option than attempting to deny port access to a long list of countries because the firewall be working with a smaller CIDR range against which each incoming request must be checked.
My Listed Ports: 22,2030,2031,2086,2087,5550,55004,1025
To limit the ability to connect on a specific port or ports to visitors with IP addresses originating in a specific country or countries, you must:
close the ports in the firewalldefine the country code allowed to connect on those blocked portsspecify the blocked ports to be opened for the specified country In this example, we’re allowing access to above My Listed Ports, to IP addresses based in My Country ( Germany).
Step #1: Close the Ports in the Firewall On the Firewall Configuration page, scroll down to th…

CWP : Improve CSF iptables performance with IPSET

CSF (ConfigServer Firewall) on a Linux system and you block a lot of IP addresses. Servers running iptables with CSF firewall can become slow and bogged down while processing the sometimes hundreds of IP addresses in CSF's iptables chains. Thankfully, it is possible to quickly and easily alleviate this slowdown by installing and configuring a took called ipset.

This option allows you to use ipset v6+ for the following csf options:
CC_* and /etc/csf/csf.blocklist, /etc/csf/csf.allow, /etc/csf/csf.deny,
GLOBAL_DENY, GLOBAL_ALLOW, DYNDNS, GLOBAL_DYNDNS, MESSENGER

ipset will only be used with the above options when listing IPs and CIDRs. Advanced Allow Filters and temporary blocks use traditional iptables. To use this option you must have a fully functioning installation of ipset installed either via rpm or source from http://ipset.netfilter.org/

It’s a straight forward process. CentOS, Red Hat and Fedora (yum based) users :
# yum install ipset -y Ubuntu or Debian:
# sudo apt-get instal…

Part 5 : Run PrestaShop 1.7.6.3 Installation again after Nginx 504 Gateway Time-out Solutions

In our Previous Tutorial Part 4, We have fixed Nginx 504 Gateway Time-out for our PrestaShop installation. Now We will run PrestaShop installation again. You have to delete all the tables from DB(datahead_db) that you created for PrestaShop. Open your Browser and visit your domain again. Follow all the steps and also provide DataBase details again and Click on "Next"
Your PrestaShop installation is finished successfully. For security purposes, you must delete the "install" folder.
Login to your Admin Panel
PrestaShop 1.7.6.3 DashBoard:

Part 4 : How to fix Nginx 504 Gateway Time-out for PrestaShop 1.7.6.3 on CWP7?

Welcome to our serious tutorial. When we are installing PrestaShop 1.7.6.3 on CWP7.pro server, we are getting error "Nginx 504 Gateway Time-out " That means CWP The gateway did not receive a timely response from the upstream server or application.
1. Adjust Timeout Value  for proxy settings 
# vi /etc/nginx/proxy.inc proxy_connect_timeout 600s; proxy_send_timeout 600; proxy_read_timeout 600;2. Change the default_socket_timeout 
# vi /opt/alt/php-fpm72/usr/php/php.ini default_socket_timeout 600Change PHP-FPM Configuration: Default Location:
/opt/alt/php-fpm72/usr/etc/ /opt/alt/php-fpm72/usr/etc/php-fpm.d/ /opt/alt/php-fpm72/usr/etc/php-fpm.d/users/3. Add following value cwpsvc.conf file :
# vi /opt/alt/php-fpm72/usr/etc/php-fpm.d/cwpsvc.conf [cwpsvc] listen = /opt/alt/php-fpm72/usr/var/sockets/cwpsvc.sock listen.owner = cwpsvc listen.group = cwpsvc listen.mode = 0640 user = cwpsvc group = cwpsvc ;request_slowlog_timeout = 5s ;slowlog = /opt/alt/php-fpm72/usr/var/log/php-fpm-s…