shorewall6(8) - Linux man page

Name

shorewall6 - Administration tool for Shoreline Firewall 6 (Shorewall6)

Synopsis

shorewall6 [trace|debug [nolock]] [-options] add interface[:host-list]... zone

shorewall6 [trace|debug [nolock]] [-options] allow address
shorewall6 [trace|debug] [-options] check [-e] [-d] [-p] [-r] [-T] [directory]
shorewall6 [trace|debug [nolock]] [-options] clear
shorewall6 [trace|debug] [-options] compile [-e] [-d] [-T] [directory] [pathname]
shorewall [trace|debug [nolock]] [-options] disable { interface | provider }
shorewall6 [trace|debug [nolock]] [-options] drop address
shorewall6 [trace|debug] [-options] dump [-x] [-l] [-m]
shorewall [trace|debug [nolock]] [-options] enable { interface | provider }
shorewall6 [trace|debug [nolock]] [-options] export [directory1] [user@]system[:directory2]
shorewall6 [trace|debug [nolock]] [-options] forget [filename]
shorewall6 [trace|debug] [-options] help
shorewall6 [trace|debug] [-options] iptrace iptables match expression
shorewall6 [trace|debug] [-options] load [-s] [-c] [-r root-user-name] [-T] [directory] system
shorewall6 [trace|debug [nolock]] [-options] logdrop address
shorewall6 [trace|debug] [-options] logwatch [-m] [refresh-interval]
shorewall6 [trace|debug [nolock]] [-options] logreject address
shorewall6 [trace|debug] [-options] noiptrace iptables match expression
shorewall6 [trace|debug [nolock]] [-options] refresh [-n] [-d] [-T] [-D directory ] [chain...]
shorewall6 [trace|debug [nolock]] [-options] reject address
shorewall6 [trace|debug] [-options] reload [-s] [-c] [-r root-user-name] [-T] [directory] system
shorewall6 [trace|debug [nolock]] [-options] reset
shorewall6 [trace|debug [nolock]] [-options] restart [-n] [-f] [-c] [-T] [directory]
shorewall6 [trace|debug [nolock]] [-options] restore [filename]
shorewall6 [trace|debug [nolock]] [-options] safe-restart [-d] [-t timeout] [directory]
shorewall6 [trace|debug] [-options] safe-start [-d] [-t timeout] [directory]
shorewall6 [trace|debug [nolock]] [-options] save [filename]
shorewall6 [trace|debug] [-options] show [-x] [-l] [-t {filter|mangle|raw}] [[chain] chain...]
shorewall6 [trace|debug] [-options] show [-f] capabilities
shorewall6 [trace|debug] [-options] show {actions|classifiers|connections|config|filters|ip|macros|zones|policies|tc|marks}
shorewall6 [trace|debug] [-options] show tc
shorewall6 [trace|debug] [-options] show [-m] log
shorewall6 [trace|debug [nolock]] [-options] start [-n] [-f] [-c] [-T] [directory]
shorewall6 [trace|debug [nolock]] [-options] stop
shorewall6 [trace|debug] [-options] status
shorewall6 [trace|debug [nolock]] [-options] try directory [timeout]
shorewall6 [trace|debug] [-options] update [-b] [-d] [-r] [-T] [-a] [directory]
shorewall6 [trace|debug] [-options] version [-a]

Description

The shorewall6 utility is used to control the Shoreline Firewall 6 (Shorewall6).

Options

The trace and debug options are used for debugging. See http://www.shorewall.net/starting_and_stopping_shorewall.htm#Trace.

The nolock option prevents the command from attempting to acquire the Shorewall6 lockfile. It is useful if you need to include shorewall6 commands in /etc/shorewall6/started.

The options control the amount of output that the command produces. They consist of a sequence of the letters v and q. If the options are omitted, the amount of output is determined by the setting of the VERBOSITY parameter in shorewall6.conf [1] (5). Each v adds one to the effective verbosity and each q subtracts one from the effective VERBOSITY. Anternately, v may be followed immediately with one of -1,0,1,2 to specify a specify VERBOSITY. There may be no white space between v and the VERBOSITY.

The options may also include the letter t which causes all progress messages to be timestamped.

Commands

The available commands are listed below.

add

Added in Shorewall 4.4.21. Adds a list of hosts or subnets to a dynamic zone usually used with VPN's.

The interface argument names an interface defined in the shorewall6-interfaces [2] (5) file. A host-list is comma-separated list whose elements are host or network addresses..if n .sp

Caution
The add command is not very robust. If there are errors in the host-list, you may see a large number of error messages yet a subsequent shorewall show zones command will indicate that all hosts were added. If this happens, replace add by delete and run the same command again. Then enter the correct command.

allow

Re-enables receipt of packets from hosts previously blacklisted by a drop, logdrop, reject, or logreject command.

check

Compiles the configuraton in the specified directory and discards the compiled output script. If no directory is given, then /etc/shorewall6 is assumed.

The -e option causes the compiler to look for a file named capabilities. This file is produced using the command shorewall6-lite show -f capabilities > capabilities on a system with Shorewall6 Lite installed.

The -d option causes the compiler to be run under control of the Perl debugger.

The -p option causes the compiler to be profiled via the Perl -wd:DProf command-line option.

The -r option was added in Shorewall 4.5.2 and causes the compiler to print the generated ruleset to standard out.

The -T option was added in Shorewall 4.4.20 and causes a Perl stack trace to be included with each compiler-generated error and warning message.

clear

Clear will remove all rules and chains installed by Shorewall6. The firewall is then wide open and unprotected. Existing connections are untouched. Clear is often used to see if the firewall is causing connection problems.

compile

Compiles the current configuration into the executable file pathname. If a directory is supplied, Shorewall6 will look in that directory first for configuration files. If the pathname is omitted, the file firewall in the VARDIR (normally /var/lib/shorewall/) is assumed. A pathname of '-' causes the compiler to send the generated script to it's standard output file. Note that '-v-1' is usually specified in this case (e.g., shorewall6 -v-1 compile -- -) to suppress the 'Compiling...' message normally generated by /sbin/shorewall6.

When -e is specified, the compilation is being performed on a system other than where the compiled script will run. This option disables certain configuration options that require the script to be compiled where it is to be run. The use of -e requires the presense of a configuration file named capabilities which may be produced using the command shorewall6-lite show -f capabilities > capabilities on a system with Shorewall6 Lite installed

The -d option causes the compiler to be run under control of the Perl debugger.

The -p option causes the compiler to be profiled via the Perl -wd:DProf command-line option.

The -T option was added in Shorewall 4.4.20 and causes a Perl stack trace to be included with each compiler-generated error and warning message.

delete

Added in Shorewall 4.4.21. The delete command reverses the effect of an earlier add command.

The interface argument names an interface defined in the shorewall6-interfaces [2] (5) file. A host-list is comma-separated list whose elements are a host or network address.

disable

Added in Shorewall 4.4.26. Disables the optional provider associated with the specified interface or provider. Where more than one provider share a single network interface, a provider name must be given.

drop

Causes traffic from the listed addresses to be silently dropped.

dump

Produces a verbose report about the firewall configuration for the purpose of problem analysis.

The -x option causes actual packet and byte counts to be displayed. Without that option, these counts are abbreviated. The -m option causes any MAC addresses included in Shorewall6 log messages to be displayed.

The -l option causes the rule number for each Netfilter rule to be displayed.

enable

Added in Shorewall 4.4.26. Enables the optional provider associated with the specified interface or provider. Where more than one provider share a single network interface, a provider name must be given.

export

If directory1 is omitted, the current working directory is assumed.

Allows a non-root user to compile a shorewall6 script and stage it on a system (provided that the user has access to the system via ssh). The command is equivalent to:

    /sbin/shorewall6 compile -e directory1 directory1/firewall &&\
    scp directory1/firewall directory1/firewall.conf [user@]system:[directory2]

In other words, the configuration in the specified (or defaulted) directory is compiled to a file called firewall in that directory. If compilation succeeds, then firewall and firewall.conf are copied to system using scp.

forget

Deletes /var/lib/shorewall6/filename and /var/lib/shorewall6/save. If no filename is given then the file specified by RESTOREFILE in shorewall6.conf [1] (5) is assumed.

help

Displays a syntax summary.

iptrace

This is a low-level debugging command that causes iptables TRACE log records to be created. See ip6tables(8) for details.

The ip6tables match expression must be one or more matches that may appear in both the raw table OUTPUT and raw table PREROUTING chains.

The trace records are written to the kernel's log buffer with faciility = kernel and priority = warning, and they are routed from there by your logging daemon (syslogd, rsyslog, syslog-ng, ...) -- Shorewall has no control over where the messages go; consult your logging daemon's documentation.

load

If directory is omitted, the current working directory is assumed. Allows a non-root user to compile a shorewall6 script and install it on a system (provided that the user has root access to the system via ssh). The command is equivalent to:

    /sbin/shorewall6 compile -e directory directory/firewall &&\
    scp directory/firewall directory/firewall.conf root@system:/var/lib/shorewall6-lite/ &&\
    ssh root@system '/sbin/shorewall6-lite start'

In other words, the configuration in the specified (or defaulted) directory is compiled to a file called firewall in that directory. If compilation succeeds, then firewall is copied to system using scp. If the copy succeeds, Shorewall6 Lite on system is started via ssh.

If -s is specified and the start command succeeds, then the remote Shorewall6-lite configuration is saved by executing shorewall6-lite save via ssh.

if -c is included, the command shorewall6-lite show capabilities -f > /var/lib/shorewall6-lite/capabilities is executed via ssh then the generated file is copied to directory using scp. This step is performed before the configuration is compiled.

If -r is included, it specifies that the root user on system is named root-user-name rather than "root".

The -T option was added in Shorewall 4.5.3 and causes a Perl stack trace to be included with each compiler-generated error and warning message.

logdrop

Causes traffic from the listed addresses to be logged then discarded. Logging occurs at the log level specified by the BLACKLIST_LOGLEVEL setting in shorewall6.conf [1] (5).

logwatch

Monitors the log file specified by the LOGFILE option in shorewall6.conf [1] (5) and produces an audible alarm when new Shorewall6 messages are logged. The -m option causes the MAC address of each packet source to be displayed if that information is available. The refresh-interval specifies the time in seconds between screen refreshes. You can enter a negative number by preceding the number with "--" (e.g., shorewall6 logwatch -- -30). In this case, when a packet count changes, you will be prompted to hit any key to resume screen refreshes.

logreject

Causes traffic from the listed addresses to be logged then rejected. Logging occurs at the log level specified by the BLACKLIST_LOGLEVEL setting in shorewall6.conf [1] (5).

noiptrace

This is a low-level debugging command that cancels a trace started by a preceding iptrace command.

The iptables match expression must be one given in the iptrace command being cancelled.

refresh

All steps performed by restart are performed by refresh with the exception that refresh only recreates the chains specified in the command while restart recreates the entire Netfilter ruleset.When no chain name is given to the refresh command, the mangle table is refreshed along with the blacklist chain (if any). This allows you to modify /etc/shorewall6/tcrulesand install the changes using refresh.

The listed chains are assumed to be in the filter table. You can refresh chains in other tables by prefixing the chain name with the table name followed by ":" (e.g., nat:net_dnat). Chain names which follow are assumed to be in that table until the end of the list or until an entry in the list names another table. Built-in chains such as FORWARD may not be refreshed.

The -n option was added in Shorewall 4.5.3 causes Shorewall to avoid updating the routing table(s).

The -d option was added in Shorewall 4.5.3 causes the compiler to run under the Perl debugger.

The -T option was added in Shorewall 4.5.3 and causes a Perl stack trace to be included with each compiler-generated error and warning message.

The -D option was added in Shorewall 4.5.3 and causes Shorewall to look in the given directory first for configuration files.

Example:

shorewall6 refresh net2fw nat:net_dnat #Refresh the 'net2loc' chain in the filter table and the 'net_dnat' chain in the nat table

reload

    /sbin/shorewall6 compile -e directory directory/firewall &&\
    scp directory/firewall directory/firewall.conf root@system:/var/lib/shorewall6-lite/ &&\
    ssh root@system '/sbin/shorewall6-lite restart'

If -s is specified and the restart command succeeds, then the remote Shorewall6-lite configuration is saved by executing shorewall6-lite save via ssh.

If -r is included, it specifies that the root user on system is named root-user-name rather than "root".

The -T option was added in Shorewall 4.5.3 and causes a Perl stack trace to be included with each compiler-generated error and warning message.

reset [chain, ...]

Resets the packet and byte counters in the specified chain(s). If no chain is specified, all the packet and byte counters in the firewall are reset.

restart

Restart is similar to shorewall6 start except that it assumes that the firewall is already started. Existing connections are maintained. If a directory is included in the command, Shorewall6 will look in that directory first for configuration files.

The -n option causes Shorewall6 to avoid updating the routing table(s).

The -p option causes the connection tracking table to be flushed; the conntrack utility must be installed to use this option.

The -d option causes the compiler to run under the Perl debugger.

The -f option suppresses the compilation step and simply reused the compiled script which last started/restarted Shorewall, provided that /etc/shorewall6 and its contents have not been modified since the last start/restart.

The -c option was added in Shorewall 4.4.20 and performs the compilation step unconditionally, overriding the AUTOMAKE setting in shorewall6.conf [1] (5). When both -f and -c are present, the result is determined by the option that appears last.

The -T option was added in Shorewall 4.5.3 and causes a Perl stack trace to be included with each compiler-generated error and warning message.

restore

Restore Shorewall6 to a state saved using the shorewall6 save command. Existing connections are maintained. The filename names a restore file in /var/lib/shorewall6 created using shorewall6 save; if no filename is given then Shorewall6 will be restored from the file specified by the RESTOREFILE option in shorewall6.conf [1] (5).

safe-restart

Only allowed if Shorewall6 is running. The current configuration is saved in /var/lib/shorewall6/safe-restart (see the save command below) then a shorewall6 restart is done. You will then be prompted asking if you want to accept the new configuration or not. If you answer "n" or if you fail to answer within 60 seconds (such as when your new configuration has disabled communication with your terminal), the configuration is restored from the saved configuration. If a directory is given, then Shorewall6 will look in that directory first when opening configuration files.

Beginning with Shorewall 4.5.0, you may specify a different timeout value using the -t option. The numeric timeout may optionally be followed by an s, m or h suffix (e.g., 5m) to specify seconds, minutes or hours respectively. If the suffix is omitted, seconds is assumed.

safe-start

Shorewall6 is started normally. You will then be prompted asking if everything went all right. If you answer "n" or if you fail to answer within 60 seconds (such as when your new configuration has disabled communication with your terminal), a shorewall6 clear is performed for you. If a directory is given, then Shorewall6 will look in that directory first when opening configuration files.

save

The dynamic blacklist is stored in /var/lib/shorewall6/save. The state of the firewall is stored in /var/lib/shorewall6/filename for use by the shorewall6 restore and shorewall6 -f start commands. If filename is not given then the state is saved in the file specified by the RESTOREFILE option in shorewall6.conf [1] (5).

show

The show command can have a number of different arguments:

actions

Produces a report about the available actions (built-in, standard and user-defined).

capabilities

Displays your kernel/ip6tables capabilities. The -f option causes the display to be formatted as a capabilities file for use with compile -e.

[ [ chain ] chain... ]

The rules in each chain are displayed using the ip6tables -L chain -n -v command. If no chain is given, all of the chains in the filter table are displayed. The -x option is passed directly through to ip6tables and causes actual packet and byte counts to be displayed. Without this option, those counts are abbreviated. The -t option specifies the Netfilter table to display. The default is filter.

The -l option causes the rule number for each Netfilter rule to be displayed.

If the -t option and the chain keyword are both omitted and any of the listed chains do not exist, a usage message is displayed.

classifiers|filters

Displays information about the packet classifiers defined on the system as a result of traffic shaping configuration.

config

Dispays distribution-specific defaults.

connections

Displays the IP connections currently being tracked by the firewall.

Displays the system's IPv6 configuration.

log

Displays the last 20 Shorewall6 messages from the log file specified by the LOGFILE option in shorewall6.conf [1] (5). The -m option causes the MAC address of each packet source to be displayed if that information is available.

macros

Displays information about each macro defined on the firewall system.

mangle

Displays the Netfilter mangle table using the command ip6tables -t mangle -L -n -v.The -x option is passed directly through to ip6tables and causes actual packet and byte counts to be displayed. Without this option, those counts are abbreviated.

marks

Added in Shorewall 4.4.26. Displays the various fields in packet marks giving the min and max value (in both decimal and hex) and the applicable mask (in hex).

policies

Added in Shorewall 4.4.4. Displays the applicable policy between each pair of zones. Note that implicit intrazone ACCEPT policies are not displayed for zones associated with a single network where that network doesn't specify routeback.

Routing

Displays the system's IPv6 routing configuration.

Displays information about queuing disciplines, classes and filters.

zones

Displays the current composition of the Shorewall6 zones on the system.

start

Start shorewall6. Existing connections through shorewall6 managed interfaces are untouched. New connections will be allowed only if they are allowed by the firewall rules or policies. If a directory is included in the command, Shorewall6 will look in that directory first for configuration files. If -f is specified, the saved configuration specified by the RESTOREFILE option in shorewall6.conf [1] (5) will be restored if that saved configuration exists and has been modified more recently than the files in /etc/shorewall6. When -f is given, a directory may not be specified.

Update: In Shorewall6 4.4.20, a new LEGACY_FASTSTART option was added to shorewall6.conf [1] (5). When LEGACY_FASTSTART=No, the modificaiotn times of files in /etc/shorewall6 are compared with that of /var/lib/shorewall6/firewall (the compiled script that last started/restarted the firewall).

The -n option causes Shorewall6 to avoid updating the routing table(s).

The -T option was added in Shorewall 4.5.3 and causes a Perl stack trace to be included with each compiler-generated error and warning message.

stop

Stops the firewall. All existing connections, except those listed in shorewall6-routestopped [3] (5) or permitted by the ADMINISABSENTMINDED option in shorewall6.conf [1] (5), are taken down. The only new traffic permitted through the firewall is from systems listed in shorewall6-routestopped [3] (5) or by ADMINISABSENTMINDED.

status

Produces a short report about the state of the Shorewall6-configured firewall.

try

If Shorewall6 is started then the firewall state is saved to a temporary saved configuration (/var/lib/shorewall6/.try). Next, if Shorewall6 is currently started then a restart command is issued; otherwise, a start command is performed. if an error occurs during the compliation phase of the restart or start, the command terminates without changing the Shorewall6 state. If an error occurs during the restart phase, then a shorewall6 restore is performed using the saved configuration. If an error occurs during the start phase, then Shorewall6 is cleared. If the start/restart succeeds and a timeout is specified then a clear or restore is performed after timeout seconds.

Beginning with Shorewall 4.5.0, the numeric timeout may optionally be followed by an s, m or h suffix (e.g., 5m) to specify seconds, minutes or hours respectively. If the suffix is omitted, seconds is assumed.

update

Added in Shorewall 4.4.21 and causes the compiler to update /etc/shorewall6/shorewall6.conf then validate the configuration. The update will add options not present in the existing file with their default values, and will move deprecated options with non-defaults to a deprecated options section at the bottom of the file. Your existing shorewall6.conf file is renamed shorewall6.conf.bak.

The -a option causes the updated shorewall6.conf file to be annotated with documentation.

The -b option was added in Shorewall 4.4.26 and causes legacy blacklisting rules (shorewall6-blacklist [4] (5) ) to be converted to entries in the blrules file (shorewall6-blrules [5] (5) ). The blacklist keyword is removed from shorewall6-zones [6] (5), shorewall-interfaces [2] (5) and shorewall6-hosts [7] (5). The unmodified files are saved with a .bak suffix.

For a description of the other options, see the check command above.

version

Displays Shorewall6's version. If the -a option is included, the version of Shorewall will also be displayed.

Files

/etc/shorewall6/

Notes

1. shorewall6.conf: http://www.shorewall.net/manpages6/shorewall6.conf.html
2. shorewall6-interfaces: http://www.shorewall.net/manpages6/shorewall6-interfaces.html
3. shorewall6-routestopped: http://www.shorewall.net/manpages6/shorewall6-routestopped.html
4. shorewall6-blacklist: http://www.shorewall.net/manpages6/shorewall6-blacklist.html
5. shorewall6-blrules: http://www.shorewall.net/manpages6/shorewall6-blrules.html
6. shorewall6-zones: http://www.shorewall.net/manpages6/shorewall6-zones.html
7. shorewall6-hosts: http://www.shorewall.net/manpages6/shorewall6-hosts.html

Referenced By

shorewall6-blrules(5), shorewall6-exclusion(5), shorewall6-ipsets(5), shorewall6-lite-vardir(5), shorewall6-modules(5), shorewall6-nesting(5), shorewall6-notrack(5), shorewall6-proxyndp(5), shorewall6-route_rules(5), shorewall6-routes(5), shorewall6-tcinterfaces(5), shorewall6-tcpri(5), shorewall6-vardir(5)

shorewall6(8) - Linux man page

Name

Synopsis

Description

Options

Commands

Files

See Also

Notes

Referenced By