This documentation presents Nulog2, a web interface for display and analysis of Netfilter firewall logs, with user authentication or not.
Users with most rejected traffic
IP Addresses with most rejected connections
Most rejected TCP ports
Most rejected UDP ports
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Nulog2 homepage
Every view can be customized. When moving the mouse over the title of a fragment, some new elements appear. The black triangle, on the left, is a menu. From this menu, one can change the graphical representation of data: a choice is offered between list (the default view), chart, or pie. The number of displayed elements can also be changed.
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A fragment displayed as chart: most rejected ports
The CSV button is used to export data from the fragment using the "Comma separated variables" (CSV) format.
The left column of the page contains some summarized information, for example the immediate rate of rejected packets on the firewall, on 1 minute; 5 minutes, and 15 minutes scales.
Some other links are displayed :
This link opens a page presenting all authenticated connections opened at the moment on the firewall.
This page shows the list of last logged packets by the firewall, without any filtering criteria.
This link opens a search window, which allows to display all connections corresponding to search criteria chosen by the user. It is also a convenient method to search into older time ranges, including archived (rotated) firewall logs in SQL tables.
This page displays, if using an authenticating firewall (NuFW), the list of connected users. Each connection matches an active NuFW client.
This page displays the history of connected users, with their current state. Sessions actually closed are also displayed.
Offers the possibility to log in to Nulog2. Nulog2 allows identified users to customize their display, by choosing the fragments, the display method etc. Nulog2 will remember customized settings for this user.
Reinitialize Nulog2 homepage. The default display is restored for the current user, exactly like the first connection
Users can add fragments to their homepage. One just need, on any page, to click on the heart symbol of the title of a fragment.
Additionally, the title of any fragment can be changed by clicking the pen symbol on the left of the fragment title.
It is also possible to change the position of a fragment using drag and drop: click on the title, keep the button pressed, and move the fragment to another location.