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The Top 20 Free Network Monitoring and Analysis Tools for Sys Admins

The Top 20 Free Network Monitoring and Analysis Tools for Sys Admins
We know how administrators love free tools that make their life easier. Here are 20 of the best free tools for monitoring devices, services, ports or protocols and analyzing traffic on your network. Even if you may have heard of some of these tools before, we’re sure you’ll find a gem or two amongst this list. 1. GFI LanGuard (our award-winning paid solution) People say it’s good to be modest and not to brag, but we’re so proud of our network management tool that we had to start the list with GFI LanGuard. With centralized patch management and network auditing, GFI LanGuard prevents potential compliance issues, but if you’re a sysadmin the fact that all machines are patched and secured will surely seem like a more important advantage. 2. Microsoft Network Monitor is a packet analyzer that allows you to capture, view and analyze network traffic. 3. Tip: If you want to try out Nagios without needing to install and configure it from scratch, download Nagios XI and enable the free version.

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www.digicert Easily Sign Files and Batches of Code Formerly, signing your software with a code signing certificate was an arcane and time-consuming process. Depending on the code you were signing, you would need to research how to sign the code, track down all the necessary assets, and labor through a clunky command line process. Fortunately, DigiCert’s utility for Windows turns this process into a smooth and easy procedure. Simply open the utility, navigate to the file you want to sign, and click a button. If you are signing a piece of kernel code, the utility can automatically ensure that the correct intermediate certificates are being used, saving you from the frustrating troubleshooting that can result from broken certificate chains.

6 Tools To Find Out Website Load Speed Research shows that if your web pages take longer than 5 seconds to load, you lose 50% of your viewers and sales. As a UNIX admin often end users and web developers complain about website loading speed and timings. Usually, there is nothing wrong with my servers or server farm. Fancy java script and images / flash makes site pretty slow. These tools are useful to debug performance problems for sys admins, developers and end users. Here are six tools that can analyzes web pages and tells you why they are slow. Network Forensics an emerging approach to a network analysis Acquire the Compromised drive and make a forensic image of it. Compare files on the forensic image to the original installation image compare hash values of coomon files , such as Win.exe and standards DLLs and ascertain whether they have changed. Network forensics has important roles to play in new and developing areas related to social networking, data mining and digital imaging, and data visualization. Social networks : Social networking sites such as Google+, Facebook, Twitter, and YouTube have expanded astronomically in recent years, but because the success of such sites depends on the number of users they attract, there is pressure on developers to design systems that encourage behavior that increases both the number of users and their connections. Security has not been a high priority, leading to the emergence of inevitable security risks.

Node.js Troubleshooting & Performance Monitoring Find the bottlenecks in your Node.js application The New Relic agent can help you identify the slowest web transactions in your Node.js app. You can see where your application is spending time in the database including noSQL datastores like Redis, mongoDB, and memcached. You can identify slow 3rd party APIs and web services, track application memory usage, and get details on your slow transactions with transaction traces.

NETWORK PACKET ANALYSIS PROGRAM Duration: 3 days (24 hours) Mode : 1. Instructor Led Class room Training and Labs How to Optimise your Time to First Byte (TTFB) to Improve Search Results What is TTFB? Time to First Byte (TTFB) is the time it takes a user to receive the first byte from a web server when requesting a particular URL. After testing several websites, data showed that although there is no solid evidence to suggest ranking had a strong correlation to TTFB values, the correlation was strong enough to analyse further. From graphical data captured by search results, it is evident that websites with a lower TTFB ranked higher than those with higher TTFB. tcpdump: Re: reconstruct HTTP requests in custom sniffer tcpdump mailing list archives Re: reconstruct HTTP requests in custom sniffer From: kay <kay21s () gmail com> Date: Wed, 29 Dec 2010 10:01:45 +0800 Hi, I have implemented a HTTP parser one year ago. I remembered that when the parser calculate the request-response latency, inspect the interested fields but do not record or dump them, the speed will reach about 2Gbps on a single core, and 8 Gbps on 6 cores.

Technical: Parsing HTTP to Extract Message Content My PhD project necessitates extracting application layer content from popular application layer protocols on the James Cook University WiFi network. This entails writing (or more likely modifying existing) application-specific protocol parsers to return the intrinsic "content" at the application layer, minus any application layer headers. The parsing/content extraction rules of one popular protocol, HTTP, are discussed in this post.