A proxy server is an intermediary application that sits between clients and servers. Instead of connecting directly to a website or service, a client sends requests to the proxy, which then forwards them to the destination server. Proxies are commonly used to: There are proxies for many protocols, including: This article focuses on web proxies, particularly using Squid. Understanding Web Objects and Caching What Are Web Objects? When discussing web proxies and caching, we often refer to objects. A web object can be: Each object is identified by a URL …
What is Alternative PHP Cache (APC)? Why It Was Replaced by OPcache and APCu
Performance optimization is an important part of managing PHP applications and web servers. In earlier PHP environments, Alternative PHP Cache (APC) was one of the most widely used caching solutions for improving application speed and reducing server load. APC worked by storing compiled PHP bytecode in shared memory, eliminating the need to recompile PHP scripts on every request. This significantly improved performance for dynamic PHP applications. However, APC is now deprecated and unsupported in modern PHP environments. Today, OPcache and APCu are the recommended alternatives for PHP caching and performance …
DHCP (Dynamic Host Control Configuration Protocol) Dynamic Host Configuration Protocol (DHCP) is a network protocol that enables a DHCP server to automatically assign an IP address to an individual computers TCP/IP stack software. DHCP assigns a number dynamically from a defined range of numbers configured for a given network.
What is a Virtual Private Server? A Virtual Private Server (VPS) is a virtualized environment that runs its own operating system within a physical server. While multiple users share the same hardware resources like CPU and RAM, these resources are allocated in a way that ensures consistent performance—similar to a dedicated server. Each user receives a defined portion of resources, meaning your allocated capacity remains available to you at all times. As a result, every VPS functions independently and behaves like a dedicated server. For example, a physical server with …
IMPORTANCE OF OSI LAYERS IN NETWORKING Network A network is an interconnection of 2 or more devices in order to communicate with each other. OSI (Open Systems Interconnection) -To divide complicated process of networking into different layers. -To allow different vendors networks to interoperate. -Developing protocols and devices for different layers. -OSI reference model was introduced by international organization for standardization (ISO). -It allows various types of network hardware and software to communicate.
Introduction As technology continues to evolve rapidly, the future of web hosting is expected to transform significantly. Advancements in hardware capabilities – including powerful processors, massive RAM capacity, and high-performance storage : are reshaping how hosting environments operate. With increasing computing power, traditional problems such as server downtime, congestion, and performance limitations are gradually becoming less common. Modern innovations, including multi-core processing and distributed infrastructure, are already paving the way toward a more reliable hosting ecosystem. The Rise of SaaS in Web Hosting One of the biggest drivers shaping the …
About Cacti Cacti is a PHP/MySQL front end to rrdtool. It handles the storage of all the information required to create and populate rrdtool graphs. Along with being able to maintain Graphs, Data Sources, and RoundRobin Archives in a DataBase, Cacti handles the data gathering also. There is also SNMP support for those used to creating traffic graphs with MRTG. You can use Cacti to gather any sort of data or fetch information from SNMP capable hosts. To manually handle data gathering, you can feed Cacti the Command Line for …
The Internet is not a secure place by default. Many early network protocols were designed without security in mind and transmit data, including passwords, in plain text. Because of this, tools that capture network traffic and extract sensitive information are commonly used by malicious attackers. Any application that sends unencrypted passwords over the network is therefore highly vulnerable. In addition, many client-server applications trust the client to identify users correctly or limit their own actions. If a client is compromised or modified, this trust can easily be abused, allowing unauthorized …
SELinux History SELinux was originally a development project from the National Security Agency (NSA), Secure Computing corporation (SCC) and others. It is an implementation of SCC and others. It is an implementation of Flask Operating System security architecture. As a step in its evolution, SELinux was integrated into Linux kernel using the Linux Security Modules (LSM) framework. SELinux motivated the creation of LSM, at the suggestion of Linus Torvalds, who wanted a modular approach to security instead of just accepting SELinux into kernel. SELinux in now a standard component of …
The Simple Network Management Protocol (SNMP) is an application layer protocol that facilitates the exchange of management information between network devices. It is part of the Transmission Control Protocol/Internet Protocol (TCP/IP) protocol suite. Two versions of SNMP exist SNMP version 1 (SNMPv1) and SNMP version 2 (SNMPv2). Both versions have a number of features in common, but SNMPv2 offers enhancements, such as additional protocol operations. Components of SNMP An SNMP-managed network consists of three key components: managed devices, agents, and network-management systems (NMSs). A managed device is a network node …