Index: stable/11/contrib/blacklist/bin/blacklistd.8 =================================================================== --- stable/11/contrib/blacklist/bin/blacklistd.8 (revision 306797) +++ stable/11/contrib/blacklist/bin/blacklistd.8 (revision 306798) @@ -1,226 +1,227 @@ -.\" $NetBSD: blacklistd.8,v 1.15 2016/03/11 17:16:40 christos Exp $ +.\" $NetBSD: blacklistd.8,v 1.18 2016/07/30 06:09:29 dholland Exp $ .\" .\" Copyright (c) 2015 The NetBSD Foundation, Inc. .\" All rights reserved. .\" .\" This code is derived from software contributed to The NetBSD Foundation .\" by Christos Zoulas. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS .\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED .\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR .\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS .\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR .\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF .\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS .\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN .\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE .\" POSSIBILITY OF SUCH DAMAGE. .\" .Dd June 7, 2016 .Dt BLACKLISTD 8 .Os .Sh NAME .Nm blacklistd .Nd block and release ports on demand to avoid DoS abuse .Sh SYNOPSIS .Nm .Op Fl dfrv .Op Fl C Ar controlprog .Op Fl c Ar configfile .Op Fl D Ar dbfile .Op Fl P Ar sockpathsfile .Op Fl R Ar rulename .Op Fl s Ar sockpath .Op Fl t Ar timeout .Sh DESCRIPTION .Nm is a daemon similar to .Xr syslogd 8 -that listens to a sockets at paths specified in the +that listens to sockets at paths specified in the .Ar sockpathsfile for notifications from other daemons about successful or failed connection attempts. If no such file is specified, then it only listens to the socket path specified by .Ar sockspath or if that is not specified to .Pa /var/run/blacklistd.sock . Each notification contains an (action, port, protocol, address, owner) tuple that identifies the remote connection and the action. This tuple is consulted against entries in .Ar configfile with syntax specified in .Xr blacklistd.conf 5 . If an entry is matched, a state entry is created for that tuple. Each entry contains a number of tries limit and a duration. .Pp If the action is .Dq add and the number of tries limit is reached, then a control script .Ar controlprog is invoked with arguments: .Bd -literal -offset indent control add
.Ed .Pp and should invoke a packet filter command to block the connection specified by the arguments. The .Ar rulename argument can be set from the command line (default .Dv blacklistd ) . The script could print a numerical id to stdout as a handle for the rule that can be used later to remove that connection, but that is not required as all information to remove the rule is kept. .Pp If the action is .Dq remove Then the same control script is invoked as: .Bd -literal -offset indent control remove
.Ed .Pp where .Ar id is the number returned from the .Dq add action. .Pp .Nm maintains a database of known connections in .Ar dbfile . On startup it reads entries from that file, and updates its internal state. .Pp .Nm checks the list of active entries every .Ar timeout seconds (default .Dv 15 ) and removes entries and block rules using the control program as necessary. .Pp The following options are available: .Bl -tag -width indent .It Fl C Ar controlprog Use .Ar controlprog to communicate with the packet filter, usually .Pa /usr/libexec/blacklistd-helper . The following arguments are passed to the control program: .Bl -tag -width protocol .It action The action to perform: .Dv add , .Dv rem , or .Dv flush to add, remove or flush a firewall rule. .It name The rule name. .It protocol The optional protocol name (can be empty): .Dv tcp , .Dv tcp6 , .Dv udp , .Dv udp6 . .It address The IPv4 or IPv6 numeric address to be blocked or released. .It mask The numeric mask to be applied to the blocked or released address .It port The optional numeric port to be blocked (can be empty). .It id For packet filters that support removal of rules by rule identifier, the identifier of the rule to be removed. The add command is expected to return the rule identifier string to stdout. .El .It Fl c Ar configuration The name of the configuration file to read, usually .Pa /etc/blacklistd.conf . .It Fl D Ar dbfile The Berkeley DB file where .Nm stores its state, usually .Pa /var/run/blacklistd.db . .It Fl d Normally, .Nm disassociates itself from the terminal unless the .Fl d flag is specified, in which case it stays in the foreground. .It Fl f Truncate the state database and flush all the rules named .Ar rulename are deleted by invoking the control script as: .Bd -literal -offset indent control flush .Ed .It Fl P Ar sockspathsfile A file containing a list of pathnames, one per line that .Nm will create sockets to listen to. This is useful for chrooted environments. .It Fl R Ar rulename Specify the default rule name for the packet filter rules, usually .Dv blacklistd . .It Fl r Re-read the firewall rules from the internal database, then remove and re-add them. This helps for packet filters that don't retain state across reboots. .It Fl s Ar sockpath Add .Ar sockpath to the list of Unix sockets .Nm listens to. .It Fl t Ar timeout The interval in seconds .Nm polls the state file to update the rules. .It Fl v Cause .Nm to print diagnostic messages to .Dv stdout instead of .Xr syslogd 8 . .El .Sh FILES .Bl -tag -width /usr/libexec/blacklistd-helper -compact .It Pa /usr/libexec/blacklistd-helper Shell script invoked to interface with the packet filter. .It Pa /etc/blacklistd.conf Configuration file. .It Pa /var/db/blacklistd.db Database of current connection entries. .It Pa /var/run/blacklistd.sock Socket to receive connection notifications. .El .Sh SEE ALSO .Xr blacklistd.conf 5 , .Xr blacklistctl 8 , .Xr npfctl 8 , .Xr syslogd 8 .Sh HISTORY .Nm first appeared in .Nx 7 . -.Fx support for +.Fx +support for .Nm was implemented in .Fx 11 . .Sh AUTHORS .An Christos Zoulas Index: stable/11 =================================================================== --- stable/11 (revision 306797) +++ stable/11 (revision 306798) Property changes on: stable/11 ___________________________________________________________________ Modified: svn:mergeinfo ## -0,0 +0,1 ## Merged /head:r306507