In a previous post I listed and described various organizations which are considered highly influential and authoritative across the wide field of information technology. These organizations are deeply involved in setting standards and best practices for nearly all facets of modern computing. One group which I neglected to include (but should have) is the North American Network Operators’ Group, or NANOG. Founded in 1994, NANOG describes itself as a “professional association for Internet engineering and architecture. Our core focus is on the technologies and systems that make the Internet function: core routing and switching; Internet inter-domain routing; the domain name system; peering and interconnection; and Internet core security. We also cover associated areas…such as data centers and optical networking.”
Although not a standards-setting body, NANOG provides a platform for knowledge exchange and professional networking opportunities in the form of their triannual meetings. These events serve as venues for some of the top minds in the industry to detail the findings of their research and to present the lessons learned from their real world work experiences. Recordings of the presentations are uploaded to the NANOG website and can be downloaded for free. This content serves as a fantastic educational resource for IT professionals who are seeking to keep their subject matter expertise sharp and relevant.
VyprVPN for Android, Mac OS X, Apple iOS, and Windows revs up your digital privacy.
A virtual private network (VPN) creates a secure network connection over a network you don’t fully trust, such as the Internet. By creating secure tunnels between endpoints, VPNs are a way of disguising (encrypting) your data traffic so that third parties (such as hackers, ISPs, and state-sponsored authorities) cannot see your true source IP address or the content of your online activities.
Many businesses, government agencies, and educational institutions use VPN technology to enable remote access for their users. With VPNs these users can securely connect to their work networks from their homes, airports, hotels, etc. What if you could connect not just to one destination, but to the whole Internet in such a way? After all, in light of the recent flood of revelations in regard to online spying committed by various facets of the American government (and by foreign states as well), all Internet users have a valid reason to increase their level of online privacy. VyprVPN by Golden Frog, a global online service provider, is an easy and highly effective way to do so.
Intrusion detection software is meant to monitor network traffic or host activities for malicious actions, such as successful or unsuccessful intrusion attempts, hostile traffic (i.e., malicious scans and denials of service), unauthorized configuration changes, malware symptoms, and user policy violations. An intrusion detection system (IDS) typically can produce reports describing the details of the potentially hazardous activity which generated alerts. OSSEC is particularly useful in this context for many reasons. First, it is an established, reputable product with a proven track record (OSSEC was first released in 2004 and has been owned by Trend Micro since 2009). Second, it is free and open source. Third, it is compatible with most modern operating systems such as Linux, Windows (Server 2008, Server 2003, 7, Vista, XP, 2000) BSD (Free/Open/Net), Unix (Solaris, HP-UX, AIX), and MacOS.
One of the key tenets of IT security is to keep intruders from gaining access to your organization’s network. Not only must the network’s edge be hardened to resist a myriad of attacks, but measures must be put into place to detect attackers who have successfully breached the perimeter. These two measures are important steps in achieving a “defense in depth” security posture, and OSSEC is an effective and affordable option to fulfill the IDS role.
Intrusion detection systems (IDS) are generally classified as either network-based or host-based in nature. A network-based IDS (NIDS) attempts to discover unauthorized access to a network by analyzing traffic as it flows between nodes for signs of malicious activity. A host-based IDS (HIDS), on the other hand, is designed to detect threats occurring on the hosts where they are installed (on servers, for example). A HIDS monitors local actions and attempts to identify those which could be hazardous. In this way a HIDS is similar to antivirus applications that identify and block certain attack patterns and raise alarms to alert users and administrators.
When you want to perform network queries for troubleshooting or data collecting purposes, the standard approach has been to launch a non-graphical command line interface (CLI) in Windows or a shell prompt (such as Bash) in Linux to display the input and output of the commands you use. While this practice is undoubtedly quick and lightweight, the functionality of many networking commands has been replicated on dozens of websites which allow network administrators the same capabilities in graphical, web-based environments.
Nearly all of the networking-related command utilities have been listed and described in this blog. Some of these commands include netstat, nslookup, ping, traceroute, and whois among others. This post will show you the best and most popular websites for using these types of commands in browser-based graphical user interfaces (GUIs). These websites will be listed in alphabetical order based on domain name.
Can You See Me
CanYouSeeMe.org issues probes to see if certain ports on your external IP address respond.
The technical standards that govern how the Internet and modern computer networks operate are debated and approved by a number of organizations. These organizations exist to ensure the proper functionality and long term feasibility of network transmission methods. IT professionals should be familiar with these organizations, how they operate, and what their specific roles and responsibilities are. After all, it is clearly within our professional purviews to intimately know the standards which dictate how the Internet’s core technologies work. For example, detailed knowledge of IPv4 (and very soon, IPv6) is a must for today’s system and network administrators. But who determines how the IP protocol operates? Who sets the standards regarding networking technologies? Read on to find out.