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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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The -q parameter is no longer required to suppress the warning screen. To make it easier to determine the direction pairs of each connection, a bracket is used to “join” both together. This is because the traffic monitor cannot determine if a connection was majual half-closed when it started.

Direction entries also become available for reuse if an ICMP Destination Unreachable message is received for the connection. Lower Window The lower window displays information about the other types of traffic on your network. The direction entries for reset connections become available for new connections.

iptraf-ng(8) – Linux manual page

You may accept this default or change it. Instances and Optraf Starting with version 2. While reverse lookup is being conducted in the background, IP addresses will be used until the resolution is complete.

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.

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. Pressing S will display a box showing the available sort criteria. Therefore, eth0 refers to the first Ethernet interface, eth1 to the second, and so on.

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IPTraf – Linux Information & Scripting

This applies to all facilities except the General Interface Statistics, which is still restricted to only one instance at a time. Entries not updated within a user-configurable amount of time may get replaced with new connections. The default time is 15 minutes. Just because a host entry appears at the upper end of a connection bracket doesn’t mean it was the initiator of the connection. However, if these get too many, active connections may become interspersed among closed, reset, manuwl idle entries.

Most machines only have one.

These are point-to-point IP connections using the PC parallel port. In addition to that, it also determines the encapsulated protocol within the IP packet, and displays some important information about that as well. For all packets in the lower window, only the first IP fragment is indicated since that contains itpraf header of the IP-encapsulated protocol but with no further information from the encapsulated protocol. This is because the standard lookup functions do not return until they have completed their tasks, and it can take several seconds for a name resolution in the foreground to complete.

Therefore, ppp0 is the first PPP interface, ppp1 is the second, and so on.

IPTraf User’s Manual

See the section on Background Operation below. UDP packets are also displayed in address: This is regardless of whether kanual connection is closed or not. If only an S is present S the source is trying to initiate a connection. Window Size The advertised window size of the most recently received packet. See the Logging section below for detailed information on logging.

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You can also press the F key to arbitrarily clear ipraf at any time. In much the same way, packets coming in from the external network will look like they’re destined for the external network’s IP address, and again as destined for the final destination on the internal network. There are two windows in the Traffic Monitor.

Data link header e. For easier location, each type of protocol is color-coded text console only. The monitor decodes the IP information on all IP packets and displays the appropriate information about it, most notably the source and destination addresses.

The following protocols are mannual The new kernels no longer do it as before and IPTraf now gives output properly on masquerading machines. These entries will eventually time out. Over time, the entries will go out of order as counts proceed at varying rates.

On masquerading machines, packets and connections from the internal network to the external network also appear twice, one for the internal and external interface. Pressing any other key will cancel the sort. 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.