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ipf(1m) [centos man page]

ipf(1M) 																   ipf(1M)

NAME
ipf - alter packet filtering lists for IP packet input and output SYNOPSIS
ipf [-AdDEInoPrsvVyzZ] [-l block | pass | nomatch] [-T optionlist] [-F i | o | a | s | S] -f filename [-f filename...] The ipf utility opens the filenames listed (treating a hyphen (-) as stdin) and parses the file for a set of rules which are to be added or removed from the packet filter rule set. If there are no parsing problems, each rule processed by ipf is added to the kernel's internal lists. Rules are added to the end of the internal lists, matching the order in which they appear when given to ipf. ipf's use is restricted through access to /dev/ipauth, /dev/ipl, and /dev/ipstate. The default permissions of these files require ipf to be run as root for all operations. The following options are supported: -A Set the list to make changes to the active list (default). -d Turn debug mode on. Causes a hex dump of filter rules to be generated as it processes each one. -D Disable the filter (if enabled). Not effective for loadable kernel versions. -E Enable the filter (if disabled). Not effective for loadable kernel versions. -F i | o | a Specifies which filter list to flush. The parameter should either be i (input), o (output) or a (remove all filter rules). Either a single letter or an entire word starting with the appropriate letter can be used. This option can be before or after any other, with the order on the command line determining that used to execute options. -F s | S To flush entries from the state table, use the -F option in conjuction with either s (removes state information about any non-fully established connections) or S (deletes the entire state table). You can specify only one of these two options. A fully established con- nection will show up in ipfstat -s output as 4/4, with deviations either way indicating the connection is not fully established. -f filename Specifies which files ipf should use to get input from for modifying the packet filter rule lists. -I Set the list to make changes to the inactive list. -l pass | block | nomatch Toggles default logging of packets. Valid arguments to this option are pass, block and nomatch. When an option is set, any packet which exits filtering and matches the set category is logged. This is most useful for causing all packets that do not match any of the loaded rules to be logged. -n Prevents ipf from making any ioctl calls or doing anything which would alter the currently running kernel. -o Force rules by default to be added/deleted to/from the output list, rather than the (default) input list. -P Add rules as temporary entries in the authentication rule table. -r Remove matching filter rules rather than add them to the internal lists. -s Swap the currently active filter list to be an alternative list. -T optionlist Allows run-time changing of IPFilter kernel variables. To allow for changing, some variables require IPFilter to be in a disabled state (-D), others do not. The optionlist parameter is a comma-separated list of tuning commands. A tuning command is one of the following: list Retrieve a list of all variables in the kernel, their maximum, minimum, and current value. single variable name Retrieve its current value. variable name with a following assignment To set a new value. Examples follow: # Print out all IPFilter kernel tunable parameters ipf -T list # Display the current TCP idle timeout and then set it to 3600 ipf -D -T fr_tcpidletimeout,fr_tcpidletimeout=3600 -E # Display current values for fr_pass and fr_chksrc, then set # fr_chksrc to 1. ipf -T fr_pass,fr_chksrc,fr_chksrc=1 -v Turn verbose mode on. Displays information relating to rule processing. -V Show version information. This will display the version information compiled into the ipf binary and retrieve it from the kernel code (if running or present). If it is present in the kernel, information about its current state will be displayed; for example, whether logging is active, default filtering, and so forth). -y Manually resync the in-kernel interface list maintained by IP Filter with the current interface status list. -z For each rule in the input file, reset the statistics for it to zero and display the statistics prior to them being zeroed. -Z Zero global statistics held in the kernel for filtering only. This does not affect fragment or state statistics. /dev/ipauth /dev/ipl /dev/ipstate Links to IP Filter pseudo devices. /etc/ipf/ipf.conf Location of ipf startup configuration file. /usr/share/ipfilter/examples/ Contains numerous IP Filter examples. See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWipfu | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ ipfstat(1M), ipmon(1M), ipnat(1M), ipf(4), attributes(5) Needs to be run as root for the packet filtering lists to actually be affected inside the kernel. To view license terms, attribution, and copyright for IP Filter, the default path is /usr/lib/ipf/IPFILTER.LICENCE. If the Solaris operat- ing environment has been installed anywhere other than the default, modify the given path to access the file at the installed location. 25 Jul 2005 ipf(1M)
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