Blog Entries

27. 04. 2017 Luca Di Stefano Network Traffic Monitoring

Find out who is eating your bandwidth with ntopng

Who really knows what are the protocols used in the local network? Usually with netflow you can distinguish traffic per l4 port (80=http,443=https,..) but this is no more sufficient. Some applications use dynamic ports (see nfs, ftp, routed sap, …), several applications use the same ports, how can we distinguish them? Applications grow and change really fast (like… Read More

22. 09. 2016 Luca Di Stefano Capacity Management, NetEye, Network Traffic Monitoring, Real User Experience Monitoring

Why does my local network latency increase during working hours?

Sometimes you get a higher network latency during certain periods of the day.

09. 06. 2016 Luca Di Stefano Network Traffic Monitoring

Network Performance Monitoring: Port Mirroring vs. Network TAPs vs. Hardware Timestamp

Monitoring network traffic was initially used only for highlighting the typology of network traffic and the quantity of packages/bites broadcasted. This information are important to analyze anomalies, to optimize flows (balance network traffic) and to size the infrastructure.

24. 02. 2016 Luca Di Stefano NetEye, Real User Experience Monitoring

Discover Overloaded Machines with NetEye RUE

With NetEye RUE we are able to build up a reliable Application and Network Performance Monitoring, by analyzing the real traffic. However, is there also a possibility to gather information about the state of the PCs and servers? Yes, it is! In the TCP communication, there exists a certain event, which informs us about the… Read More

15. 01. 2016 Luca Di Stefano NetEye, Real User Experience Monitoring

Network Performance: Explicit Congestion Notification

When the network apparatuses are asking for help. We often hear of network congestion, perhaps a little less often than what are the mechanisms that try to manage it. The primary mechanism for managing the congestion is the drop packet. When the apparatus is in trouble it throws packets in a pseudo-random order to save… Read More

10. 11. 2014 Luca Di Stefano NetEye, Real User Experience Monitoring, Uncategorized

New DNS Plugin for Real User Experience

Users often complain about long load times when trying to access IT services (Web, Citrix, Terminal Server ecc.). Also cloud services like Office 365 can be concerned. Increased load times can have various reasons – one of this reasons may be an elevated timespan needed to resolve the DNS address. To discover such problems we… Read More

06. 05. 2014 Luca Di Stefano Network Traffic Monitoring, Real User Experience Monitoring

Real User Experience – TCP Plugin

Until now, the NetEye Real User Experience was able to view the key performance indicators linked only to those applications that are using the http / https protocols. The new TCP plugin allows to display KPI for all the applications that use the TCP protocol with a client request / server response model: The plugin… Read More

20. 12. 2012 Luca Di Stefano NetEye, ntop, Real User Experience Monitoring

Real User Experience Monitoring with NetEye

In order to analyze the quality level of the delivered IT services the traditional monitoring systems used to focus exclusively on the control of hardware and software components and the network, neglecting the measurement of the performance experienced by the end user. Until now it was not always possible, in fact, to give a precise… Read More

22. 04. 2012 Luca Di Stefano Real User Experience Monitoring

Real User Experience Monitoring: How to handle a load balancer

The Real User Experience Monitoring (RUM) is a new approach adopted to provide specific control on IT services and systems, allowing to analyse the performance and response time that the user really experiences. If you have an application behind a load balancer and the probe is between the client and the load balancer, the RUM retrieves… Read More

24. 02. 2011 Luca Di Stefano NetEye, Network Traffic Monitoring

NetEye: Qui custodiet custodes

Chi controlla i controllori?Con questo non voglio certo discutere come Giovenale sui costumi romani, ma presentare un nuovo strumento che darà maggior sicurezza all’appliance NetEye.La nuova funzionalità si occupa di tenere sotto controllo lo stato di NetEye. Qualora l’Appliance non desse più segni di vita, si attiva in automatico l’invio di SMS di emergenza per… Read More

11. 01. 2010 Luca Di Stefano Nagios, NetEye

Neteye ha imparato a parlare…

Il progetto fastrack voice nasce dall’esigenza di fornire notifiche a mezzo voce a destinatari raggiungibili su linea fissa o mobile. Una funzionalità di notifica che va ad aggiungersi alle già disponibili email e sms e che rende NetEye più vicino alle esigenze dei clienti. Questo nuovo add-on permette di avere dei messaggi preregistrati da inviare,… Read More