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26 results for: tcp

How to Send Email from an HTML Contact Form

In today’s article we will write about how to make a working form that upon hitting that submit button will be functional and send the email (to you as a web creator and to the user or customer as well). If you’re a PHP developer, there's a high probability that you…

Category : Programming   10-05-2021   by Tibor Kopca

Network attacks and how to avoid them

Nowadays it is impossible to list all the different types of attacks that can be carried out on a network, as in the world of security this varies continuously. We bring you the most common ones according to the network attack databases, so that we can keep up to date…

Category : Security   03-05-2021   by Silvia Mazzetta

Network and port scanning with Zenmap

This article goes out to all the computer nerds who are, when it comes to networking, more on the noob-side of the crowd. It does not have to be complicated and everyone with patience and eagerness to learn something new can relatively quickly gain the knowledge necessary to feel more…

Category : Security   08-10-2020   by Iveta Karailievova

Popular DNS Attacks and how to prevent them

DNS services are essential for web browsing. However, it is one of the most vulnerable to attacks. This guide will detail the most dangerous DNS attacks and some actions that will protect the network infrastructure. One of the reasons why DNS services have some susceptibility to attack is the UDP transport…

Category : Security   20-07-2020   by Silvia Mazzetta

Configuring DNS-over-TLS and DNS-over-HTTPS with any DNS Server

Configuring DNS-over-TLS and DNS-over-HTTPS with any DNS Server

The new DNS-over-TLS (DoT) and DNS-over-HTTPS (DoH) protocols are available for enabling end user's privacy and security given the fact that most DNS clients use UDP or TCP protocols which are prone to eavesdropping, vulnerable to Man-in-the-Middle (MitM) attacks and, are frequently abused by ISPs in many countries with Internet…

Category : Networking   27-12-2018   by Janeth Kent

80 Linux Network Monitor Software & Tools for Managing & Monitoring Unix/Linux Systems

80 Linux Network Monitor Software & Tools for Managing & Monitoring Unix/Linux Systems

It’s hard work monitoring and debugging Linux performance problems, but it’s easier with the right tools at the right time. Finding a Linux Network Monitor tool or Software package for your Critical servers and services that are running on those systems in one of the most (if not the most)…

Category : Security   23-10-2018   by Janeth Kent

Setting Up SFTP on Ubuntu 16.04

Setting Up SFTP on Ubuntu 16.04

I recently had a request to setup SFTP for a customer so they could manage a set of files in their environment through an FTP GUI. Being an avid user of command line tools like SCP I haven’t needed to set up FTP or SFTP in many years. So I…

Category : Operating systems   12-03-2018   by Janeth Kent

ArangoDB, install and configure the popular Database in ubuntu 16.04

ArangoDB, install and configure the popular Database in ubuntu 16.04

Introduction to ArangoDb, open source, NoSQL, multi-model database BigData seems to be getting stronger every day and more and more NoSQL databases are coming out to the market, all trying to position themselves in the lead to be the reference. This week I tried ArangoDB! Another NoSQL database? Today I'm going to…

Category : Databases   14-11-2017   by Janeth Kent

How to Configure the Mod_Security Core Ruleset in Ubuntu

How to Configure the Mod_Security Core Ruleset in Ubuntu

ModSecurity is a Web Application Firewall, a program that can be used to inspect information as it passes through your web server, intercepting malicious requests before they are processed by your web application. This tutorial will show you how to install ModSecurity on Apache, and configure it with some sensible rules provided…

Category : Servers   04-03-2017   by Janeth Kent

Setup FTP server with VSFTPD in Ubuntu 16.04

Setup FTP server with VSFTPD in Ubuntu 16.04

Introduction FTP, short for File Transfer Protocol, is a network protocol that was once widely used for moving files between a client and server. It has since been replaced by faster, more secure, and more convenient ways of delivering files. Many casual Internet users expect to download directly from their web…

Category : Servers   14-02-2017   by Janeth Kent

Ubuntu servers security: 25 security tools to armor your system

Ubuntu servers security: 25 security tools to armor your system

The Ubuntu repositories contain several useful tools for maintaining a secure network and network administration.This security tools include network scanning,attack detection,Virus Detection etc.   1) Wireshark -- network traffic analyzer Wireshark is a network traffic analyzer, or "sniffer", for Unix and Unix-like operating systems. It is used for network troubleshooting, analysis, software and…

Category : Servers   14-09-2016   by Janeth Kent

What is a DDOS attack and tools used

A DOS attack is an attempt to make a system or server unavailable for legitimate users and, finally, to take the service down. This is achieved by flooding the server’s request queue with fake requests. After this, server will not be able to handle the requests of legitimate users. The denial…

Category : Security   04-05-2021   by Janeth Kent

Install HHVM + Nginx on Ubuntu 14.04

Install HHVM + Nginx on Ubuntu 14.04

  The LEMHH software stack is a group of software that can be used to serve dynamic web pages and web applications. This is an acronym that describes a Linux operating system, with an Nginx web server. The backend data is stored in MySQL and the dynamic processing is handled by…

Category : Networking   12-05-2017   by Janeth Kent

Display Linux TCP / UDP Network and Socket Information with the 'ss' command

The ss command is used to show socket statistics. It can display stats for PACKET sockets, TCP sockets, UDP sockets, DCCP sockets, RAW sockets, Unix domain sockets, and more. It allows showing information similar to netstat command. It can display more TCP and state information than other tools. It is…

Category : Networking   23-05-2020   by Janeth Kent

The Best Free SSH Tabbed Terminal Clients for Windows

PuTTy is an emulator for the terminal. It allows you to log into another computer that can be on the same network or accessed via the internet. The basic program has no security, but you can add authentication and encryption to SSH to protect internet connections. The tool also includes…

Category : Networking   05-05-2021   by Janeth Kent

Protect Ubuntu Servers With Fail2Ban

Protect Ubuntu Servers With Fail2Ban

​Servers do not exist in isolation, and those virtual private servers with only the most basic SSH configuration can be vulnerable to brute force attacks. fail2ban provides a way to automatically protect virtual servers from malicious behavior. The program works by scanning through log files and reacting to offending actions…

Category : Security   17-02-2015   by Janeth Kent

How to setup FTP server on ubuntu 14.04 with VSFTPD

How to setup FTP server on ubuntu 14.04 with VSFTPD

FTP is used to transfer files from one host to another over TCP network. This article explains how to setup FTP server on ubuntu 14.04 . There are 3 popular FTP server packages available PureFTPD, VsFTPD and ProFTPD. Here i’ve used VsFTPD which is lightweight and less Vulnerability. Step 1 » Update…

Category : Networking   13-01-2015   by Janeth Kent

PHP: list of best awesome PHP libraries

PHP: list of best awesome PHP libraries

It is an exciting time to be a PHP developer. There are lots of useful libraries released every day, and with the help of Composer and Github, they are easy to discover and use. Here is a complete list of the coolest that We’ve come across. Package Management Libraries for package and…

Category : Php   27-04-2014   by Janeth Kent

10 Server and network monitoring tools

10 Server and network monitoring tools

When you have a website or a network, it’s helpful to be aware of any issues as soon as they occur. There are open source and freeware server/network monitoring tools that will supervise your infrastructure for any issues that may arise. These tools are meant to aid you in avoiding…

Category : Networking   04-02-2014   by Janeth Kent

Tricks for speeding up your Android device

Tricks for speeding up your Android device

When you hit the home button or launch a new app, it takes what seems like an eternity to switch to the new task or back to the desktop... Maybe your Android phone has become so slow that letters appear a second or two after you type them. These simple tips and…

Category : Operating systems   20-08-2013   by Janeth Kent

Top 15 Free Hacking Tools for Ethical Hackers

Intrusion tests, known as "Penetration Analysis" or "Ethical Hacking", are now a common practice to know the level of security a website has. These tests assess the type and extent of system and network vulnerabilities in terms of confidentiality and integrity. They check the security of the network and empirically verify…

Category : Security   19-06-2020   by Silvia Mazzetta

Useful list of commands for linux server management

Useful list of commands for linux server management

List of checks that you can perform on a linux server to try and figure out why it keeps going down Disk Space: df -h (Make sure you have enough disk space) Memory: free -m (Check you're not out of memory) Processes / Load average top (shift + m) htop (Check for processes that are taking up a lot of…

Category : Networking   09-07-2013   by Janeth Kent

Predis: PHP Library for REDIS

Predis: PHP Library for REDIS

Redis is an open source data structure server with an in-memory dataset that does much more than simple key/value storage thanks to its built-in data types. It was started in 2009 by Salvatore Sanfilippo and because of its popularity quickly grew, being chosen by big companies like VMware (who later hired…

Category : Programming   01-07-2013   by Janeth Kent

Ubuntu UFW Firewall - Uncomplicated Firewall for Ubuntu

Ubuntu UFW Firewall - Uncomplicated Firewall for Ubuntu

Introduction to UFW - Uncomplicated Firewall The default firewall configuration tool for Ubuntu is ufw. Developed to ease iptables firewall configuration, ufw provides a user friendly way to create an IPv4 or IPv6 host-based firewall. By default UFW is disabled. Gufw is a GUI that is available as a frontend. Basic Syntax and…

Category : Networking   27-05-2013   by Janeth Kent

Install and Setup SSL in Webmin and Apache

Install and Setup SSL in Webmin and Apache

  SSL is a protocol for making secure, authenticated connections across an insecure network like the Internet. It encrypts network traffic, so that an attacker cannot listen in on the network and capture sensitive information such as passwords and credit card numbers. It allows servers to authenticate themselves to clients, so…

Category : Networking   11-04-2013   by Janeth Kent

Distributed Storage Across Multiple Servers (Nodes) With GlusterFS 3.2.x On Ubuntu 12.10

Distributed Storage Across Multiple Servers (Nodes) With GlusterFS 3.2.x On Ubuntu 12.10

  This tutorial shows how to combine four single storage servers (running Ubuntu 11.10) to one large storage server (distributed storage) with GlusterFS. The client system (Ubuntu 11.10 as well) will be able to access the storage as if it was a local filesystem. GlusterFS is a clustered file-system capable of scaling…

Category : Operating systems   11-04-2013   by Janeth Kent

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