When setting up infrastructure, getting your applications up and running will often be your primary concern. However, making your applications to function correctly without addressing the security needs of your infras...

Hi all, I downloaded tomcat in ubuntu and MySQL database so tomcat runs successfully with my server IP address and the port, and when I want to deploy the war file of my application it gives me “ERR_CONNECTION_REFUSED”

This tutorial will guide you through setting up a firewall with UFW on Ubuntu 22.04.

In this guide, you will install and configure a Memcached server. You’ll also add authentication to secure Memcached using Simple Authentication and Security Layer (SASL). Finally, you’ll learn how to bind Memcached t...

Are there plans to allow for better k8s firewall management? It looks like fw is auto-generated when k8s clusters are created. I’d like to create my own with its own rules and have them auto-assign (or manually-assign...

Title describes the problem. I installed the console but it times out waiting for handshake. I have UFW (iptables) configured to only allow specific hosts access on port 22. Is there an IP range for DO I can add to ge...

Learn how to setup a firewall with UFW on an Ubuntu / Debian cloud server.

Hi, OS - UBUNTU 20.04 Problem: Recently our server and database (postgresql) being attacked by specific IP (45.155.204.146). The IP keep on trying to connect to our database and we believe subsequently cause our postg...

I’m running Ubuntu 20.04 Server on my droplet along with Nginx. Should I install anti-virus software like ClamAV as in the following link? Is it essential or recommended? I’m also utilizing a fw and Cloudflare DNS pro...

NAT, or network address translation, is a general term for mangling packets in order to redirect them to an alternative address. Usually, this is used to allow traffic to transcend network boundaries. A host that impl...

Implementing a firewall is an important step in securing your server. In this guide, you’ll learn how to construct a firewall that can be the basis for more complex rule sets. This firewall will focus primarily on pro...

I installed plesk on ubuntu, my project works with port 3000 and other ports which needs to be enabled and also listens, but i am finding it difficult to find out how to really open it and get it to listen. Here is wh...

Can I explicit allow DigitalOcean console access via ssh without opening my droplet’s 22 to the entire internet? AKA does the console exist on the 10.x.x.x subnet or another entity I can whitelist.

Hello everyone, my website is bietduoc.net currently selling to customers all over the world, but now the Indian market has many people entering SEO Spam, not real customers. So what if I want to temporarily block Ind...

How can I block all my servers access from Russia?Do you have a magic button? Regards.

I’ll be creating six Droplets (Debian) with both UFW and DO firewalls all to run a copy of a web service. I will also create one droplet to manage these servers. Can I set the firewalls for the servers to accept incom...

In this final tutorial in the series, you will create custom Kibana rules and generate alerts within Kibana’s SIEM dashboards. Once you have rules in place and understand where and how to filter Suricata’s logs using ...

I’m using the digitalocean firewall, I would like to know if is necessary to use fail2ban too?

Here is a screen grab of ‘grep “Failed password” /var/log/auth.log’for reference: https://imgur.com/a/G2bwrZO I have the port range 30999:59999 set to DENY IN from ANYWHERE for udp and tcp traffic, yet I’m still recei...

The previous tutorials in this series guided you through installing, configuring, and running Suricata as an Intrusion Detection (IDS) and Intrusion Prevention (IPS) system. You also learned about Suricata rules and h...