Network configuration in Ubuntu 18.04 LTS using netplan

With Ubuntu 18.04 onwards, configuring IP addresses stands different from the older versions. When comparing with the previous versions the Ubuntu is using a new utility called Netplan – another order line arrange design utility, to arrange an IP address.

Netplan has been presented by Ubuntu engineers in Ubuntu 17.10 where we no longer use the “interfaces” file to configure IP address but does the task using a YAML file with all default arrangement documents found under /etc/netplan/ directory. In this blog, we will check on how to design static and dynamic IP address in Ubuntu 18.04 LTS server.

Continue reading…

CVE-2017-5638: Apache Struts 2 Vulnerability

Apache Struts 2 is an open-source development framework for Java applications.
On March 6th, 2017, a vulnerability tracked as CVE-2017-5638 in Apache Struts 2 was made public. This vulnerability could allow an attacker to perform remote code execution with malicious Content.
This particular vulnerability can be exploited if the attacker sends a  request to upload a file to a vulnerable server that uses a Jakarta-based plugin to process the upload request.
The attacker can then send malicious code in the Content-Type header to execute the command on a vulnerable server.
The Jakarta Multipart parser in Apache Struts 2 2.3.x before 2.3.32 and 2.5.x before 2.5.10.1 mishandles file upload, which allows remote attackers to execute arbitrary commands via a #cmd= string as exploited in the wild in March 2017.

Solution
===========
Both Cisco and Apache researchers asked administrators to upgrade their systems to Apache Struts version 2.3.32 or 2.5.10.1

If you require help, contact SupportPRO Server Admin

Server not running properly? Get A FREE Server Checkup By Expert Server Admins - $125 Value

Configuration of HAProxy Load Balancer on CentOS

HAProxy stands for High Availability Proxy.  It is a very fast and reliable solution for high availability and load balancing. HAProxy is used as TCP/HTTP Load Balancer and for proxy Solutions. The HAProxy application will share the workload with multiple servers.

Steps for Installation and Configuring  HAProxy
===========

Step 1: Before proceeding with the installation of  HAProxy in the server, we need to install the epel repository on our system depending on the operating system version using the following command.
Continue reading…

Monitor Real Time Resource Usage in CloudLinux :: lvetop

CloudLinux is one of the widely used Operating System nowadays due to the high-level stability and advanced server security it provides, which makes it the first preference for hosting providers, especially in a shared hosting environment.

LVE (Lightweight Virtual Environment) is a kernel-level technology developed by the CloudLinux team. It is lightweight and transparent. The goal of LVE is to make sure that no single website can bring down your web server.

The kernel makes sure that all LVEs get a fair share of the server’s resources, and that no customer can use more than the limits set for that customer.
Continue reading…