Open the Connections tab in the Overview section to view the list of active connections and open ports used by individual applications. This overview of connections makes users aware of which applications are actively involved in current network communication and which applications are waiting for connections.
A port is considered open when:
an outgoing connection is established (green background)
an incoming connection is established (red background)
an application is listening for connections — server mode (transparent background)
List of applications which include at least one open port can be found in the Connections tab.
Figure 15.1. Overview / Connections — Overview of active connections and open ports used by individual applications
The first line represents each application's icon and name (description)
— if the application has no icon, the default system icon for executable
files will be used; if no description (name) is available, the name of the file
without the extension will be displayed. Click on the [+]
button next to the application icon to view or on the [-]
button to hide open ports currently used by the application.
The other lines provide information on individual open connections. Outgoing connections are green, incoming connections are red. Individual columns provide detailed information on each connection:
- Local Point
Local IP address (or a corresponding DNS name) and port (or name of a service in case of a standard service).
The following special names can be used instead of a DNS name:
All — port is open at all local IP addresses (IP address
0.0.0.0)Loopback — local loopback IP address (
127.0.0.1)
- Remote Point
IP address (or DNS name) and port number (or a service name) of a particular remote point. The same information for the local IP address and port is provided (see above).
- Protocol
Used protocol (TCP, UDP, or both).
- Speed In, Speed Out
Current speed of incoming (In) and outgoing (Out) data of the particular connection in kilobytes per second (KB/s).
- Bytes In, Bytes Out
Total extent of incoming (In) and outgoing (Out) data within the particular connection.
Note: In case of a port which waits for an incoming connection, only the local IP address, local port and protocol are available.
Current number of active connections and open ports is displayed at the bottom of the Connections tab (in the status line):
Connected in — number of established incoming connections
Connected out — number of established outgoing connections
Listening — number of ports at which application wait for connection