Given the huge amount of data that traverses a network, all network monitoring boils down to choosing which samples of data you should pay attention to. And active monitoring, sending and receiving diagnostic traffic or device info is no different. More samples can increase fidelity, but can also cost more in network overhead and analysis. So choosing the right sample size is important.… Read More »
IPv6 has been around for two decades, and yet it is only now making up a meaningful portion of Internet traffic. Reports today find that there are between 10-15 billion Internet-connected devices (each requiring an IP address), yet only 2.8 billion routed IPv4 addresses. The conclusion? Most connected devices do not have unique, public IPv4 addresses and instead utilize network address translation (NAT) to communicate with the Internet.… Read More »
Last week Rostelecom, one of Russia’s largest, partially state-owned Internet service providers, leaked dozens of routes pertaining to IP addresses that belong to major financial services firms. This route leak redirected Internet traffic bound for these financial firms to Rostelcom, as some routers around the Internet decided that the new, leaked routes were preferable to the legitimate ones. … Read More »
Last week we took ThousandEyes Connect to the road and visited Seattle, bringing together network engineers, architects and site reliability teams to discuss network performance. Scott Hinckley, Sr. Site Reliability Engineer for Microsoft Dynamics 365, opened up the morning presentations.… Read More »
Over the past 3 years, net neutrality has been a hot political topic as the Obama and Trump administrations have taken diverging positions. Most recently, with a repeal of 2015 privacy protections, the Trump Administration has signalled a move away from the principle of net neutrality. … Read More »
The domain name system (DNS) is a directory service that allows Internet-connected devices to lookup information for resources on the Internet. The information provided includes IP addresses, which are used to route Internet traffic. DNS uses a combination of record types to ultimately guide users to the right address for the Internet resource they’re looking for. We’ll cover the major… Read More »
When folks talk about end user or ‘real user’ monitoring, they usually mean injecting code (often Javascript) into an application to measure user behavior and timing. This can be great to complement an application monitoring strategy. But this sort of method doesn’t work when the application in question isn’t yours (as in the case of Software-as-a-Service apps). This method also fails to provide a detailed understanding of connectivity.… Read More »
On Friday, October 21st, a series of large-scale DDoS attacks were launched against Dyn, a managed DNS provider. Over the course of 18 hours, these attacks disrupted many critical services–including Spotify, Amazon and HBO Now–all of whom are customers of Dyn. At the height of the attack, approximately 75% of our global vantage points sent queries that went unanswered by Dyn’s servers.… Read More »
This week we added support for File Transfer Protocol (FTP) with a new web layer test, the FTP Server Test. This new tests helps network ops teams quickly visualize and troubleshoot file transfer performance, whether for an internal or external FTP server. We also pair the FTP Server Test with our standard TCP/IP metrics and views of network paths and routes to help streamline fault detection. You can validate both FTP server listings and content.… Read More »
If you’re like most ops teams, you’re heavy users of alerts from your various systems and sensors. Our customers at ThousandEyes are sending out thousands of alert notifications per day. That’s a lot of emails. And although you’re likely also power users of email too, we’re guessing that’s something you’re less happy about. We’re excited to introduce two new integrations… Read More »