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If you work on a network, you then know the value of information. Solid information leads to a strong and worry-free network (or at least as worry-free as you can manage). In order to gather that information, you need the right tools. The tools I speak of are network analyzers. Once you start looking, you can find analyzers of every shape, size, and price. But for most network admins, the free tools do a solid-enough job to get you the information you need.
But which of these tools are the best? If you start looking, you'll find plenty available. To help narrow the search for you, I've found five of the best network analyzers available. From this list, you should be able to find the one tool that perfectly suits your needs. With that promise made, let's dive in and see what's what.
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1. Wireshark
Wireshark is one of the most powerful network protocol analyzers on the market (free or paid). In fact, Wireshark is often considered the de facto standard among the industry. This analyzer features: Live capture and offline analysis; standard three-pane packet browser; multi-platform (Windows, Linux, OS X, Solaris, FreeBSD, NetBSD, and many others); captured network data can be browsed via GUI, or via the TTY-mode TShark utility. Other features include: powerful display filters; rich VoIP analysis; read/write many different capture file formats; capture files can be compressed with on the fly; live data can be read from Ethernet, IEEE 802.11, PPP/HDLC, ATM, Bluetooth, USB, Token Ring, Frame Relay, FDDI, and others; decryption support; coloring rules; output can be exported to XML, PostScript, CSV, or plain text.
2. NAST
NAST (Network Analyzer Sniffer Tool) is an ncurses-based tool that has, admittedly, not been under development for quite some time. Even so, the tool is quite useful and does a great job of capturing network traffic. I put this tool on the list because it's invaluable if the only machine you have access to is a UNIX GUI-less server. But even if you have a GUI, this tool is quite handy. NAST features: Build LAN hosts list; follow a TCP-DATA stream; find LAN internet gateways; discover promiscuous nodes; reset an established connection; perform a single half-open portscanner; perform a multi half-open portscanner; find link type (hub or switch); catch daemon banner of LAN nodes; control arp answers to discover possible arp-spoofings; byte counting with an optional filter; and write reports logging.
3. Zenmap
Zenmap is the official GUI for the Nmap Security Scanner. Zenmap is available for Windows, Linux, Mac, and BSD. Zenmap can be used to read live captures or save captures for later viewing. With Zenmap you can empower the features of Nmap to help you with: network inventory, managing service upgrade schedules, and monitoring host or service uptime. Features include: Host discovery; port scanning; version detection; OS detection; scriptable interface; web scanning; full IPv6 support; Nping support; fast scanning; and much more.
4. Angry IP Scanner
Angry IP Scanner is another open source, cross platform scanner that is designed, from the ground up, to be incredibly fast and very simple to use. Angry IP offers the following features: Portable (zero installation on certain platforms); ping checks; NetBIOS information; resolves hostnames; determines MAC address; can determine currently logged-in user; plug in system; scan results can be saved as CSV, TXT, XML, or IP-Port list; and fast, mutli-threaded scanning.
5. JDSU Network Analyzer Fast Ethernet
JDSU Network Analyzer Fast Ethernet has a long name and is long in features. Although it has numerous features, you don't have to be a full-blown network analyst to make use of this tool. JDSU allows anyone (of nearly any experience level) to: Quickly determine who is on a network, who is using bandwidth, and where errors may be occurring on the network. You can also identify problems before they become serious issues; use expert analysis tools to solve network problems quickly; capture and analyze network traffic in real-time; and analyze data offline. JDSU offers multi-technology analysis, a consistent user-interface across platforms, and is scalable for distributed analysis.
Bottom line
No matter what your level of expertise, and your network needs, one of these tools should make the gathering of information about your network a simple task. Whether you need a simple, ncurses-based tool, or a full-blown, full-featured GUI, you can find what you're looking for and not have to spend a single penny.
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If you've followed the steps to connect your Mac to a Wi-Fi network, but the connection to your network or the Internet isn't reliable, the steps in this article might help.
Check for Wi-Fi recommendations
When your Mac tries to connect to a Wi-Fi network, it checks for issues that affect its ability to create a fast, stable, and secure connection. Kaspersky internet security removal tool for mac. If an issue is detected, the Wi-Fi status menu in the menu bar shows a new item: Wi-Fi Recommendations. Choose it to see recommended solutions.
Wi-Fi recommendations are available in macOS Sierra or later.
Analyze your wireless environment
Network Analysis Tools Open Source
Your Mac can use Wireless Diagnostics to perform additional analysis.
- Quit any apps that are open, and connect to your Wi-Fi network, if possible.
- Press and hold Option (Alt) ⌥ key, then choose Open Wireless Diagnostics from the Wi-Fi status menu .
- Enter your administrator name and password when prompted.
Wireless Diagnostics begins analyzing your wireless environment:
If the issue is intermittent, you can choose to monitor your Wi-Fi connection:
When you're ready to see recommendations, continue to the summary. Wireless Diagnostics asks for optional information about your base station or other router, so that it can include that in the report it saves to your Mac.
Click the info button next to each item in the summary to see details about that item. Wi-Fi best practices are tips that apply to most Wi-Fi networks.
Back up or make note of your network or router settings before changing them based on these recommendations—in case you need to use those settings again.
Monitor your Wi-Fi connection
Your Mac can monitor your Wi-Fi connection for intermittent issues, such as dropped connections. Follow the steps to analyze your wireless environment, but choose ”Monitor my Wi-Fi connection” when prompted.
During monitoring, a window shows that monitoring is in progress. Monitoring continues as long as this window is open and you're on the same Wi-Fi network, even when your Mac is asleep.
If Wireless Diagnostics finds an issue, it stops monitoring and shows a brief description of the issue. Clash of clans windows download. You can then resume monitoring or continue to the summary for details and recommendations.
Create a diagnostics report
Wireless Diagnostics automatically saves a diagnostics report before it displays its summary. You can create the same report at any time: press and hold the Option key, then choose Create Diagnostics Report from the Wi-Fi status menu . It can take your Mac several minutes to create the report.
- macOS Sierra and later saves the report to the /var/tmp folder of your startup drive, then opens that folder for you.
To open the folder manually, choose Go > Go to Folder from the Finder menu bar, then enter /var/tmp. - OS X El Capitan or earlier saves the report to your desktop.
The report is a compressed file with a name that begins “WirelessDiagnostics.” It contains many files that describe your wireless environment in detail. A network specialist can examine them for further analysis.
Use other diagnostics utilities
Wireless Diagnostics includes additional utilities for network specialists. Open them from the Window menu in the Wireless Diagnostics menu bar:
- Info gathers key details about your current network connections.
- Logs enables background logging for Wi-Fi and other system components. The result is saved to a .log file in the diagnostics report location your Mac. Logging continues even when you quit the app or restart your Mac, so remember to disable logging when you're done.
- Scan finds Wi-Fi routers in your environment and gathers key details about them.
- Performance uses live graphs to show the performance of your Wi-Fi connection:
- Rate shows the transmit rate over time in megabits per second.
- Quality shows the signal-to-noise ratio over time. When the quality is too low, your device disconnects from the Wi-Fi router. Factors that affect quality include the distance between your device and the router, and objects such as walls that impede the signal from your router. Learn more.
- Signal shows both signal (RSSI) and noise measurements over time. You want RSSI to be high and noise to be low, so the bigger the gap between RSSI and noise, the better.
- Sniffer captures traffic on your Wi-Fi connection, which can be useful when diagnosing a reproducible issue. Select a channel and width, then click Start to begin capturing traffic on that channel. When you click Stop, a .wcap file is saved to the diagnostics report location on your Mac.
Learn more
Additional recommendations for best Wi-Fi performance:
- Keep your router up to date. For AirPort Time Capsule, AirPort Extreme, or AirPort Express Base Station, check for the latest firmware using AirPort Utility. For non-Apple routers, check the manufacturer's website.
- Set up your router using Apple's recommended settings, and make sure that all Wi–Fi routers on the same network use similar settings. If you're using a dual-band Wi-Fi router, make sure that both bands use the same network name.
- Learn about potential sources of Wi-Fi and Bluetooth interference.
Learn about other ways to connect to the Internet.