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ipfstat(8) FreeBSD System Manager's Manual ipfstat(8) NAME ipfstat - reports on packet filter statistics and filter list SYNOPSIS ipfstat [ -46aAdfghIilnoRsv ] ipfstat -t [ -6C ] [ -D <addrport> ] [ -P <protocol> ] [ -S <addrport> ] [ -T <refresh time> ] DESCRIPTION ipfstat examines /dev/kmem using the symbols _fr_flags, _frstats, _filterin, and _filterout. To run and work, it needs to be able to read both /dev/kmem and the kernel itself. The kernel name defaults to /boot/kernel/kernel. The default behaviour of ipfstat is to retrieve and display the accumulated statistics which have been accumulated over time as the kernel has put packets through the filter. OPTIONS -4 Display filter lists and states for IPv4, if available. This is the default when displaying states. -4 and -6 is the default when displaying lists. -6 Display filter lists and states for IPv6, if available. -a Display the accounting filter list and show bytes counted against each rule. -A Display packet authentication statistics. -C This option is only valid in combination with -t. Display "closed" states as well in the top. Normally, a TCP connection is not displayed when it reaches the CLOSE_WAIT protocol state. With this option enabled, all state entries are displayed. -d Produce debugging output when displaying data. -D <addrport> This option is only valid in combination with -t. Limit the state top display to show only state entries whose destination IP address and port match the addrport argument. The addrport specification is of the form ipaddress[,port]. The ipaddress and port should be either numerical or the string "any" (specifying any IP address resp. any port). If the -D option is not specified, it defaults to "-D any,any". -f Show fragment state information (statistics) and held state information (in the kernel) if any is present. -g Show groups currently configured (both active and inactive). -h Show per-rule the number of times each one scores a "hit". -i Display the filter list used for the input side of the kernel IP processing. -I Swap between retrieving "inactive"/"active" filter list details. -P <protocol> This option is only valid in combination with -t. Limit the state top display to show only state entries that match a specific protocol. The argument can be a protocol name (as defined in /etc/protocols) or a protocol number. If this option is not specified, state entries for any protocol are specified. -R Don't try to resolve addresses to hostnames and ports to services while printing statistics. -s Show packet/flow state information (statistics only). -sl Show held state information (in the kernel) if any is present (no statistics). -S <addrport> This option is only valid in combination with -t. Limit the state top display to show only state entries whose source IP address and port match the addrport argument. The addrport specification is of the form ipaddress[,port]. The ipaddress and port should be either numerical or the string "any" (specifying any IP address resp. any port). If the -S option is not specified, it defaults to "-S any,any". -t Show the state table in a way similar to the way top(1) shows the process table. States can be sorted using a number of different ways. This option requires curses(3) and needs to be compiled in. It may not be available on all operating systems. See below, for more information on the keys that can be used while ipfstat is in top mode. -T <refreshtime> This option is only valid in combination with -t. Specifies how often the state top display should be updated. The refresh time is the number of seconds between an update. Any positive integer can be used. The default (and minimal update time) is 1. -v Turn verbose mode on. Displays more debugging information. When used with either -i or -o, counters associated with the rule, such as the number of times it has been matched and the number of bytes from such packets is displayed. For "keep state" rules, a count of the number of state sessions active against the rule is also displayed. SYNOPSIS The role of ipfstat is to display current kernel statistics gathered as a result of applying the filters in place (if any) to packets going in and out of the kernel. This is the default operation when no command line parameters are present. When supplied with either -i or -o, it will retrieve and display the appropriate list of filter rules currently installed and in use by the kernel. One of the statistics that ipfstat shows is ticks. This number indicates how long the filter has been enabled. The number is incremented every half-second. STATE TOP displayed information: b show packets/bytes from backward direction. f show packets/bytes from forward direction. (default) l redraw the screen. q quit the program. s switch between different sorting criterion. r reverse the sorting criterion. States can be sorted by protocol number, by number of IP packets, by number of bytes and by time-to-live of the state entry. The default is to sort by the number of bytes. States are sorted in descending order, but you can use the r key to sort them in ascending order. STATE TOP LIMITATIONS It is currently not possible to interactively change the source, destination and protocol filters or the refresh frequency. This must be done from the command line. The screen must have at least 80 columns. This is however not checked. When running state top in IPv6 mode, the screen must be much wider to display the very long IPv6 addresses. Only the first X-5 entries that match the sort and filter criteria are displayed (where X is the number of rows on the display. The only way to see more entries is to resize the screen. FILES /dev/kmem /dev/ipl /dev/ipstate /kernel SEE ALSO ipf(8) BUGS -4 and -6 are only valid with -i, -o, and -t. An error should result when used with other arguments. ipfstat(8)