Top Receivers with the Most Failed Connections

Top Receivers with the Most Failed Connections report reveals devices that initiated the highest number of unsuccessful TCP connection attempts, or SYN packets.

Unsuccessful connections (incomplete TCP handshakes) can imply port scanning, penetration testing, and methods used by security testers or hackers to find potential intrusion points on a network. Large numbers of these half-open or incomplete connections can also denote an attempt at a denial of service (DoS) attack.

Receiver. Host name of the top receiver with the most failed connections.
Connection Attempts. Number of failed connection attempts.
Packet Rate. Total average packet rate.
Packet Percentage. Percentage of top n items ranked.

Several report columns do not appear by default and can be configured to display in this report. You can display the following additional report columns:

IP address. Receiver's IP address.
Hostname. Receiver's hostname.

Tip: To show reports in full screen with most if not all possible columns, click on report options ( ) menu and choose Expand ().

Generate a report

Choose source. , Choose a networking device or single physical or virtual interface you want to see Top Receivers with the Most Failed Connections measurements for. Choose traffic direction across an interface.

Choose time constraints. Choose times for the Top Receivers with the Most Failed Connections.

Choose, filter, and reorder columns. Choose and hide columns, reorder columns, and apply advanced filters to customize your data view.

Chart, adjust output, and visualize. Fine tune report presentation and range of values displayed using the Report Settings dialog (optional).

Share, export, and save as PDF

Most generated Top Receivers with the Most Failed Connections report data can be printed, shared, and exported when selecting Expand () from the Dashboard Options () menu. After the report has been expanded, select export () to access the following options:

Export to PDF. Save grid and chart views as PDF.
Export Data. Export Top Receivers with the Most Failed Connections data and leverage outside of WhatsUp Gold.
Schedule Export. Set a recurring date and time, format, and email destination for report data export.

Control	Description
Device.	Browse and choose a networking device that is a Network Traffic Analysis monitoring source.
Network Interface.	Choose a single physical or virtual interface Network Traffic Analysis you want traffic statistics for. Choose direction of traffic over the network interface (Inbound, Outbound, Inbound and Outbound, or Bounce for invalid traffic.).

Control	Purpose
Date Range	Choose or define an overall date range.
Business hours	Focus on specific days of the week and periods within each day. Reveal trends that are sensitive to business hours, time zones, and other periodic attributes in the observed data.

Control	Purpose
Columns.	Click a check box to display the column. Clear the check box to hide it.
Move Column.	Click on a column heading and drag it to reorder your table's columns.
Advanced Filtering.	Apply category, pattern, and keyword filtering to column data.

Control	Purpose
Show Top n Items	Limit items to the samples with the highest values.
Sort by Field	Select a column to sort by (if applicable).

Control	Purpose
View Options	Select/clear the checkboxes to display/hide Totals. Display totals for each column. Others. Remainder values that do not make the top n. Chart. Display the selected Chart Type. Legend. Include legend and grid lines for readability. Trend Lines. Present data a smoothed average to show trend.
Chart Type	Select a chart type and associated options: Pie. Pie distribution chart. Line/Area. Scatter graph that connects adjacent measurements with straight lines. Spline/Area Spline. Choose a graph with a smoothed appearance where adjacent samples exhibit a gradual slope. Vertical Bar/Horizontal Bar. Vertical or horizontal bar chart/histogram.
Y-Axis Scale	Scale Y-axis (chart and graph height) automatically or choose a fixed size.

Top Receivers with the Most Failed Connections

Generate a report

Choose time constraints for data view

Filter and pick by column

Specify threshold and top n:

Chart and view options

Share, export, and save as PDF