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shorewall-blrules(5)

NAME

   blrules - shorewall Blacklist file

SYNOPSIS

   /etc/shorewall/blrules

DESCRIPTION

   This file is used to perform blacklisting and whitelisting.

   Rules in this file are applied depending on the setting of
   BLACKLISTNEWONLY in shorewall.conf[1](5). If BLACKLISTNEWONLY=No, then
   they are applied regardless of the connection tracking state of the
   packet. If BLACKLISTNEWONLY=Yes, they are applied to connections in the
   NEW and INVALID states.

   The format of rules in this file is the same as the format of rules in
   shorewall-rules (5)[2]. The difference in the two files lies in the
   ACTION (first) column.

   ACTION-
   {ACCEPT|BLACKLIST|blacklog|CONTINUE|DROP|A_DROP|REJECT|A_REJECT|WHITELIST|LOG|QUEUE|NFQUEUE[(queuenumber)]|[?]COMMENT|action|macro[(target)]}[:{log-level|none}[!][:tag]]
       Specifies the action to be taken if the packet matches the rule.
       Must be one of the following.

       BLACKLIST
           Added in Shorewall 4.5.3. This is actually a macro that expands
           as follows:

           *   If BLACKLIST_LOGLEVEL is specified in shorewall.conf[1](5),
               then the macro expands to blacklog.

           *   Otherwise it expands to the action specified for
               BLACKLIST_DISPOSITION in shorewall.conf[1](5).

       blacklog
           May only be used if BLACKLIST_LOGLEVEL is specified in
           shorewall.conf[1](5). Logs, audits (if specified) and applies
           the BLACKLIST_DISPOSITION specified in shorewall.conf[1] (5).

       ACCEPT|CONTINUE|WHITELIST
           Exempt the packet from the remaining rules in this file.

       DROP
           Ignore the packet.

       A_DROP and A_DROP!
           Audited versions of DROP. Requires AUDIT_TARGET support in the
           kernel and ip6tables.

       REJECT
           disallow the packet and return an icmp-unreachable or an RST
           packet.

       A_REJECT
           Audited versions of REJECT. Require AUDIT_TARGET support in the
           kernel and ip6tables.

       LOG
           Simply log the packet and continue with the next rule.

       QUEUE
           Queue the packet to a user-space application such as ftwall
           (http://p2pwall.sf.net). The application may reinsert the
           packet for further processing.

       NFLOG[(nflog-parameters)]
           queues matching packets to a back end logging daemon via a
           netlink socket then continues to the next rule. See
           http://www.shorewall.net/shorewall_logging.html[3].

       NFQUEUE
           Queues the packet to a user-space application using the
           nfnetlink_queue mechanism. If a queuenumber is not specified,
           queue zero (0) is assumed.

       ?COMMENT
           The rest of the line will be attached as a comment to the
           Netfilter rule(s) generated by the following entries. The
           comment will appear delimited by "/* ... */" in the output of
           "shorewall show <chain>". To stop the comment from being
           attached to further rules, simply include ?COMMENT on a line by
           itself.

       action
           The name of an action declared in shorewall-actions[4](5) or in
           /usr/share/shorewall/actions.std.

       macro
           The name of a macro defined in a file named macro.macro. If the
           macro accepts an action parameter (Look at the macro source to
           see if it has PARAM in the TARGET column) then the macro name
           is followed by the parenthesized target (ACCEPT, DROP, REJECT,
           ...) to be substituted for the parameter.

           Example: FTP(ACCEPT).

       The ACTION may optionally be followed by ":" and a syslog log level
       (e.g, REJECT:info or Web(ACCEPT):debug). This causes the packet to
       be logged at the specified level.

       If the ACTION names an action declared in shorewall-actions[4](5)
       or in /usr/share/shorewall/actions.std then:

       *   If the log level is followed by "!' then all rules in the
           action are logged at the log level.

       *   If the log level is not followed by "!" then only those rules
           in the action that do not specify logging are logged at the
           specified level.

       *   The special log level none!  suppresses logging by the action.

       You may also specify NFLOG (must be in upper case) as a log
       level.This will log to the NFLOG target for routing to a separate
       log through use of ulogd
       (http://www.netfilter.org/projects/ulogd/index.html).

       Actions specifying logging may be followed by a log tag (a string
       of alphanumeric characters) which is appended to the string
       generated by the LOGPREFIX (in shorewall.conf[1](5)).

   For the remaining columns, see shorewall-rules (5)[2].

EXAMPLE

   Example 1:
       Drop Teredo packets from the net.

           DROP          net:[2001::/32]            all

   Example 2:
       Don't subject packets from 2001:DB8::/64 to the remaining rules in
       the file.

           WHITELIST     net:[2001:DB8::/64]        all

FILES

   /etc/shorewall/blrules

SEE ALSO

   http://www.shorewall.net/blacklisting_support.htm[5]

   http://www.shorewall.net/configuration_file_basics.htm#Pairs[6]

   shorewall(8), shorewall-accounting(5), shorewall-actions(5),
   shorewall-hosts(5), shorewall-interfaces(5), shorewall-maclist(5),
   shorewall6-netmap(5),shorewall-params(5), shorewall-policy(5),
   shorewall-providers(5), shorewall-rtrules(5),
   shorewall-routestopped(5), shorewall-rules(5), shorewall.conf(5),
   shorewall-secmarks(5), shorewall-tcclasses(5), shorewall-tcdevices(5),
   shorewall-mangle(5), shorewall-tos(5), shorewall-tunnels(5),
   shorewall-zones(5)

NOTES

    1. shorewall.conf
       http://www.shorewall.net/manpages/shorewall.conf.html

    2. shorewall-rules (5)
       http://www.shorewall.net/manpages/shorewall-rules.html

    3. http://www.shorewall.net/shorewall_logging.html
       http://www.shorewall.net/shorewall.logging.html

    4. shorewall-actions
       http://www.shorewall.net/manpages/shorewall-actions.html

    5. http://www.shorewall.net/blacklisting_support.htm
       http://www.shorewall.net/blacklisting_support.htm

    6. http://www.shorewall.net/configuration_file_basics.htm#Pairs
       http://www.shorewall.net/configuration_file_basics.htm#Pairs



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