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A common factor of every network monitoring system is an alerting module for time series. This module aims at triggering a warning when any type of abnormal behavior is detected in the patterns of a time series. Such a search for anomalies can be carried out by network managers as a supervised task such that the thresholds for considering a measurement as an anomaly are set following a manual process. Alternatively, we focus on how to translate such a task to an unsupervised one, thus alleviating network managers' dedication. To this end, we have developed, based on the experience of monitoring dozens of networks, a player of real anomalies. Thus, by recreating real issues, the alerting systems' parametrization can be carried out without supervision. Additionally, as a novelty, we propose to consider the network managers' workforce as a significant parameter to configure the thresholds of the alerting moduleessentially, avoiding triggering alarms that will hardly receive attention. Then, we propose to measure and rank alarms by relevance, and relate them to the time to be solved for constructing, eventually, automatic schedules for the members of the staff-according to their time availability. Finally, all these proposals have been put into practice in various deployments of monitoring systems on networks in operation, which gives us evidence of its usefulness and low demand for resources.

Satellite Communication (SatCom) offers internet connectivity where traditional infrastructures are too expensive to deploy. When using satellites in a geostationary orbit, the distance from Earth forces a round trip time higher than 550 ms. Coupled with the limited and shared capacity of the physical link, this poses a challenge to the traditional internet access quality we are used to.In this paper, we present the first passive characterization of the traffic carried by an operational SatCom network. With this unique vantage point, we observe the performance of the SatCom technology, as well as the usage habits of subscribers in different countries in Europe and Africa. We highlight the implications of such technology on Internet usage and functioning, and we pinpoint technical challenges due to the CDN and DNS resolution issues, while discussing possible optimizations that the ISP could implement to improve the service offered to SatCom subscribers.

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