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IPTraf User’s Manual. Copyright © , by Gerard Paul Java. Version 0 Preparing to Use IPTraf · Number Display Notations · Instances and Logging . iptraf is an ncurses-based IP LAN monitor that generates various network Frederic Peters ([email protected]), using iptraf –help General manual page. IPTraf User’s Manual IPTraf has a few optional command-line parameters. As with most UNIX commands, IPTraf command-line parameters are case-sensitive .

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Data link header e. This item is visible if you press M for more TCP information. This applies ipyraf all facilities except the General Interface Statistics, which is still restricted to only one instance at a time.

Because of this relaxation, each instance now generates log files with unique names for instances, depending on either their instance or the interface they’re listening on. DONE The connection is done sending data in this direction, and has sent a FIN finished packet, but has not yet been acknowledged by the other host.

A synchronization is taking place in preparation for connection establishment. Lower Window The lower window displays information about the other types of traffic on your network. The default log file names will also be used if the -B parameter ,anual used to run IPTraf in the background.

In other words, it does not determine which endpoint is the client, and which is the server.

See also the documentation on each statistical facility for the default log file names. Cancelling will turn logging off for that particular session. Over time, the entries will go out of order as counts proceed at varying rates.

Just enable reverse lookup in the Configure menu.


That being the case, the system displays two entries for each connection, one for each direction of the TCP connection. In addition to that, it also determines the encapsulated protocol within the IP packet, and displays some important information about that as well.

Because this monitoring system relies solely on packet information, it does not determine which endpoint initiated the connection. TCP connection endpoints are still indicated with the green brackets along the left edge of the screen.

Entries not updated within a user-configurable amount of time may get replaced with new connections. The following protocols are detected: The monitor decodes the IP information on all IP packets and displays the appropriate information about it, most notably the source and destination addresses. Packets coming from the internal network will be indicated as coming from the internal IP address that sourced them, and also as coming from the IP address of the external interface on your masquerading machine.

iptraf(8) – Linux man page

This is because the traffic monitor cannot determine if a connection was already half-closed when it started. A request to push all data to the top of the receiving queue U URG. For all packets in the lower window, only the first IP fragment is indicated since that contains the header of the IP-encapsulated protocol but with no further information from the encapsulated protocol.

Most machines only have one. This bracket appears at the leftmost part of each entry. Therefore, eth0 refers to the first Ethernet interface, eth1 to the second, and so on.

This is regardless of whether the connection is closed or not. Direction entries also become available for reuse if an ICMP Destination Unreachable message is received for the connection.

iptraf-ng(8) – Linux manual page

However, screen updates are one of the slowest operations the program performs. Ethernet and FDDI data are not included. These are point-to-point IP connections using the PC parallel port.


On masquerading machines, packets and connections from the internal network to the external network also appear twice, one for the internal and external interface.

Проект OpenNet: MAN iptraf () (FreeBSD и Linux)

This manua the source machine and TCP port on that machine from which this data is coming. In other words, the figures indicated do not reflect the counts since the start of the TCP connection, but rather, since the start of the traffic monitor. Every machine has one, and has an IP address of You can also press the F key to arbitrarily clear it at any time.

The direction entries for reset connections become available for new connections. The Traffic Monitor is a real-time monitoring system that intercepts all packets on all detected network interfaces. If an A is also present S-A-this is an acknowledgment of a previous connection request, and is responding. Source address majual port Mqnual source address and port indicator is in address: Some unclosed connections may be due to extremely slow links or crashes at either iotraf of the connection.

The rvnamed Process The IP Traffic Monitor starts a daemon called rvnamed to help speed up reverse lookups without sacrificing too much keyboard control and accuracy of the counts. See the Logging section below for detailed information on logging.