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shorewall-tcfilters(5)


NAME

   tcfilters - Shorewall u32/basic classifier rules file

SYNOPSIS

   /etc/shorewall/tcfilters

DESCRIPTION

   Entries in this file cause packets to be classified for traffic
   shaping.

   Beginning with Shorewall 4.4.15, the file may contain entries for both
   IPv4 and IPv6. By default, all rules apply to IPv4 but that can be
   changed by inserting a line as follows:

   IPV4
       Following entries apply to IPv4.

   IPV6
       Following entries apply to IPv6

   ALL
       Following entries apply to both IPv4 and IPv6. Each entry is
       processed twice; once for IPv4 and once for IPv6.

   The columns in the file are as follows (where the column name is
   followed by a different name in parentheses, the different name is used
   in the alternate specification syntax).

   CLASS - interface:class
       The name or number of an interface defined in
       shorewall-tcdevices[1](5) followed by a class number defined for
       that interface in shorewall-tcclasses[2](5).

   SOURCE - {-|address|+ipset}
       Source of the packet. May be a host or network address. DNS names
       are not allowed. Beginning with Shorewall 4.6.0, an ipset name
       (prefixed with '+') may be used if your kernel and ip6tables have
       the Basic Ematch capability and you set BASIC_FILTERS=Yes in
       shorewall.conf (5)[3]. The ipset name may optionally be followed by
       a number or a comma separated list of src and/or dst enclosed in
       square brackets ([...]). See shorewall-ipsets(5)[4] for details.

   DEST - {-|address|+ipset}
       Destination of the packet. May be a host or network address. DNS
       names are not allowed. Beginning with Shorewall 4.6.0, an ipset
       name (prefixed with '+') may be used if your kernel and ip6tables
       have the Basic Ematch capability and you set BASIC_FILTERS=Yes in
       shorewall.conf (5)[3]. The ipset name may optionally be followed by
       a number or a comma separated list of src and/or dst enclosed in
       square brackets ([...]). See shorewall-ipsets(5)[4] for details.

       You may exclude certain hosts from the set already defined through
       use of an exclusion (see shorewall-exclusion[5](5)).

   PROTO - {-|{protocol-number|protocol-name|all}[,...]}
       Protocol.

       Beginning with Shorewall 4.5.12, this column can accept a
       comma-separated list of protocols.

   DPORT - [-|port-name-or-number]
       Optional destination Ports. A Port name (from services(5)) or a
       port number; if the protocol is icmp, this column is interpreted as
       the destination icmp-type(s).

       This column was previously labelled DEST PORT(S).

   SPORT - [-|port-name-or-number]
       Optional source port.

       This column was previously labelled SOURCE PORT(S).

   TOS (Optional) - [-|tos]
       Specifies the value of the TOS field. The tos value can be any of
       the following:

       *   tos-minimize-delay

       *   tos-maximize-throughput

       *   tos-maximize-reliability

       *   tos-minimize-cost

       *   tos-normal-service

       *   hex-number

       *   hex-number/hex-number

       The hex-numbers must be exactly two digits (e.g., 0x04)x.

   LENGTH - [-|number]
       Optional - Must be a power of 2 between 32 and 8192 inclusive.
       Packets with a total length that is strictly less than the
       specified number will match the rule.

   PRIORITY - [-|priority]
       Added in Shorewall 4.5.8. Specifies the rule priority. The priority
       value must be > 0 and <= 65535.

       When a priority is not given:

       *   For Shorewall versions prior to 4.5.8 - all filters have
           priority 10.

       *   For Shorewall 4.5.8 and later - for each device, the compiler
           maintains a high-water priority with an initial value of 0.
           When a filter has no priority, the high-water priority is
           incremented by 1 and assigned to the filter. When a priority
           greater than the high-water priority is entered in this column,
           the high-water priority is set to the specified priority. An
           attempt to assign a priority value greater than 65535
           (explicitly or implicitly) raises an error.

       The default priority values used by other Shorewall-generated
       filters are as follows:

       *   Classify by packet mark - ( class priority << 8 ) | 20.

       *   Ingress policing - 10

       *   Simple TC ACK packets - 1

       *   Complex TC ACK packets - ( class priority << 8 ) | 10.

       *   Classify by TOS - ( class priority << 8 ) | 15.

       *   Class with 'occurs' - 65535

EXAMPLE

   Example 1:
       Place all 'ping' traffic on interface 1 in class 10. Note that ALL
       cannot be used because IPv4 ICMP and IPv6 ICMP are two different
       protocols.

                  #CLASS    SOURCE    DEST         PROTO   DPORT

                  IPV4

                  1:10      0.0.0.0/0 0.0.0.0/0    icmp    echo-request
                  1:10      0.0.0.0/0 0.0.0.0/0    icmp    echo-reply

                  IPV6

                  1:10      ::/0      ::/0         icmp6   echo-request
                  1:10      ::/0      ::/0         icmp6   echo-reply

   Example 2:
       Add two filters with priority 10 (Shorewall 4.5.8 or later).

                  #CLASS    SOURCE    DEST         PROTO   DPORT           PRIORITY

                  IPV4

                  1:10      0.0.0.0/0 0.0.0.0/0    icmp    echo-request    10
                  1:10      0.0.0.0/0 0.0.0.0/0    icmp    echo-reply      10

FILES

   /etc/shorewall/tcfilters

SEE ALSO

   http://www.shorewall.net/traffic_shaping.htm[6]

   http://www.shorewall.net/MultiISP.html[7]

   http://www.shorewall.net/PacketMarking.html[8]

   http://www.shorewall.net/configuration_file_basics.htm#Pairs[9]

   shorewall(8), shorewall-accounting(5), shorewall-actions(5),
   shorewall-blacklist(5), shorewall-ecn(5), shorewall-exclusion(5),
   shorewall-hosts(5), shorewall_interfaces(5), shorewall-ipsets(5),
   shorewall-maclist(5), shorewall-masq(5), shorewall-nat(5),
   shorewall-netmap(5), shorewall-params(5), shorewall-policy(5),
   shorewall-providers(5), shorewall-proxyarp(5), shorewall-rtrules(5),
   shorewall-routestopped(5), shorewall-rules(5), shorewall.conf(5),
   shorewall-secmarks(5), shorewall-tcclasses(5), shorewall-tcdevices(5),
   shorewall-tos(5), shorewall-tunnels(5), shorewall-zones(5)

NOTES

    1. shorewall-tcdevices
       http://www.shorewall.net/manpages/shorewall-tcdevices.html

    2. shorewall-tcclasses
       http://www.shorewall.net/manpages/shorewall-tcclasses.html

    3. shorewall.conf (5)
       http://www.shorewall.netshorewall.conf.html

    4. shorewall-ipsets(5)
       http://www.shorewall.netshorewall-ipsets.html

    5. shorewall-exclusion
       http://www.shorewall.net/manpages/shorewall-exclusion.html

    6. http://www.shorewall.net/traffic_shaping.htm
       http://www.shorewall.net/traffic_shaping.htm

    7. http://www.shorewall.net/MultiISP.html
       http://www.shorewall.net/MultiISP.html

    8. http://www.shorewall.net/PacketMarking.html
       http://www.shorewall.net/PacketMarking.html

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



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