As you can see, the name of the process that is running is truncated. The network interface may also be truncated as it is in the example above where the interface is actually enp0s Looking more closely, you will also likely notice that two of the lines in the output above show a truncated rendition of the IP addresses and ports for two of the connections.
You can also use trace mode with the -t option to watch network connections as they occur. The nethogs output above shows fairly modest network usage. The system is working, but not working up a sweat. If the total bandwidth is considerably higher, you might want to look more deeply into what's going on. But, as I've said before, knowing how your system normally works is key to understanding when it's under unusually high demand.
The data below would indicate a considerably busier system with respect to its network usage. The nethogs command is a great tool for looking at one important aspect of system performance. It can be used with other important commands to get a clear idea how systems are working and can be invaluable in nailing down performance problems when the network interface is what's slowing things down. Sandra Henry-Stocker has been administering Unix systems for more than 30 years.
However, the torrent client also prevented scheduled incremental server backups, company-wide Microsoft Exchange mail delivery and threat definition updates for security suites, as it sucked all available bandwidth.
Did this particular bandwidth hog increase or decrease risk, in your opinion? In this instance, bandwidth monitoring if IT were present could have easily identified the problem. Although companies generally avoid managing bandwidth per user, it is a feasible option.
This means every user has a defined amount of bandwidth available. In the above example, a user downloaded material from a torrent site. Such software may have embedded malware or keyloggers that transmit gathered data to a remote server, consuming bandwidth in the process. The software could create a backdoor for the hacker, allowing complete access to your network. As if these problems are not enough to alarm you, consider what will happen if illegal software is discovered during an external software audit.
The financial penalties and reputational damage are often substantial. It's not the easiest to learn, but it's extremely powerful once you've got the hang of it. Wireshark offers multiple ways to track down bandwidth hogs, for example, under Statistics Endpoints IP and then sort the columns to identify the top talkers.
Example: Wireshark Endpoints. If none of the above has helped, your last line of defense is taps in combination with a packet broker. Taps are physical devices that are installed in-line in your network. Because they're in-line, they see all of your traffic and send copies of the traffic it to a central monitoring device.
The monitoring device, called a packet broker, collects the traffic from all of your taps and forwards it to network monitoring tools for analysis. How Network Taps Work. Taps and packet brokers are usually too expensive for an SMB to consider. So, if you really, really need to track down a problem, and the steps above haven't helped, you can hire someone to temporarily tap the network for you.
Installing taps involves temporary interruptions in the network, so this isn't something you want to do often. We've now seen all the steps and possible solutions, from easiest to most difficult, that you can use to track down bandwidth hogs in your network and to ensure efficient working of your hardware, routers, and fast internet for everyone.
Steps for Tracking Down Bandwidth Hogs. Did you find our guide helpful? How do you find bandwidth hogs? Leave us a comment in the section below. Monitoring Insights. Good, now we have your attention: Would you like to get our very un-annoying, mostly un-salesy, informative weekly newsletter?
What's the status of your industrial cabinet? Several options to monitor your backup with PRTG. Since , we offer monitoring solutions for businesses across all industries and all sizes, from SMB to large enterprises.
We believe monitoring plays a vital part in reducing humankind's consumption of resources. Our products help our customers optimize their IT, OT and IoT infrastructures, and reduce their energy consumption or emissions — for our future and our environment. Learn more about Paessler Subscribe to our blog newsletter. To submit a tech question, email Rob at rob robpegoraro. Follow him on Twitter at robpegoraro.
Facebook Twitter Email. Sluggish Wi-Fi? Here's how to find out who — or what — is hogging your bandwidth.
0コメント