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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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IPTraf User’s Manual

The direction entries for reset connections become available for new connections. 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 source pitraf indicated in this direction reset the entire connection. The -q parameter is no longer required to suppress the warning screen. Both of them can be scrolled with the Up and Down cursor keys. A request to push all data to the top of the receiving queue U URG.

To make it easier to determine the direction pairs of each connection, a bracket is used to “join” both together.

You can also press the F key to arbitrarily clear it at any time. The Traffic Monitor is a real-time monitoring system that intercepts uptraf packets on all detected network interfaces. There are two windows in the Traffic Monitor.

iptraf(8) – Linux man page

See the Screen update interval The default log file names will manusl be used if the -B parameter is used to run IPTraf in the background. Packet Size The size of the most recently received packet. Your system’s network interfaces must be named according to the schemes specified above. The sort operation compares the larger values in each connection entry pair and sorts the counts in descending order.


IPTraf – Linux Information & Scripting

Apply appropriate measures, or the targeted machine may begin denying network services. Entries not updated within a user-configurable amount of time may get replaced with new connections. That being the case, the system displays two entries for each connection, one for each direction of the TCP connection. In much the same way, packets coming in from the external network iptrf look like they’re destined for the external network’s IP address, and again as destined for the final destination on the internal network.

The window contains these pieces of information: Press P to sort by packet count, B to sort by byte count. 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. In other words, it does not determine which endpoint is the client, and which is the server. On masquerading machines, packets and connections from the internal network to the external network also appear twice, one for the internal and external interface.

A synchronization is taking place in preparation for connection establishment. 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.


This is the size of the IP datagram only, not including the data link header. If for some reason rvnamed cannot start probably due to improper installation or lack of memoryand you are on the Internet, and you enable reverse lookup, your keyboard control can become very slow. If an A is also present S-A-this is an acknowledgment of a previous connection request, and is responding.

Just press W to move the Active indicator to the window you want to control. 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.

Every machine has one, and has an IP address of 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. Direction entries also become available for reuse if an ICMP Destination Unreachable message is received for the connection.

Most machines only have one. When both directions of a connection are marked CLOSED, the entries they occupy become available for new connection entries.

This applies to all facilities except the General Interface Statistics, which is still restricted to only one instance at a time.