shorewall6 8 Administrative Commands shorewall6 Administration tool for Shoreline Firewall 6 (Shorewall6) shorewall6 trace|debugnolock -options add { interface[:host-list] zone | zone host-list } shorewall6 trace|debugnolock -options allow address shorewall6 trace|debug -options check | ck -e -d -p -r -T -i directory shorewall6 trace|debugnolock -options clear shorewall6 trace|debugnolock -options close open-number | sourcedestprotocol port shorewall6 trace|debug -options compile | co -e -d -T -i directory pathname shorewall6 trace|debugnolock -options delete { interface[:host-list] zone | zone host-list } shorewall6 trace|debugnolock -options disable { interface | provider } shorewall6 trace|debugnolock -options drop address shorewall6 trace|debug -options dump -x -l -m -c shorewall6 trace|debugnolock -options enable { interface | provider } shorewall6 trace|debugnolock -options export directory1 [user@]system[:directory2] shorewall6 trace|debugnolock -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 -i directory system shorewall6 trace|debugnolock -options logdrop address shorewall6 trace|debug -options logwatch -m refresh-interval shorewall6 trace|debugnolock -options logreject address shorewall6 trace|debug -options noiptrace iptables match expression shorewall6 trace|debugnolock -options open source dest protocol port shorewall6 trace|debugnolock -options recover-n-p shorewall6 trace|debugnolock -options refresh-n-d-T-i-D directory chain shorewall6 trace|debugnolock -options reject address shorewall6 trace|debug -options reload -s -c -r root-user-name -T -i directory system shorewall6 trace|debugnolock -options reset shorewall6 trace|debugnolock -options restart -n -f -c -T -i-C directory shorewall6 trace|debugnolock -options restore-C filename shorewall6 trace|debugnolock -options run command parameter ... shorewall6 trace|debugnolock -options safe-restart -d -t timeout directory shorewall6 trace|debug -options safe-start -d -t timeout directory shorewall6 trace|debugnolock -options save-C filename shorewall6 trace|debugnolock -options savesets shorewall6 trace|debug -options show | list | ls -x {bl|blacklists} shorewall6 trace|debug -options show | list | ls -b -x -l -t {filter|mangle|raw} chainchain shorewall6 trace|debug -options show | list | ls -f capabilities shorewall6 trace|debug -options show | list | ls actions|classifiers|connections|config|events|filters|ip|macros|zones|policies|tc|marks shorewall6 trace|debug -options show | list | ls eventevent shorewall6 trace|debug -options show | list | ls -c routing shorewall6 trace|debug -options show | list | ls -x mangle|nat|raw|rawpost shorewall6 trace|debug -options show | list | ls tc shorewall6 trace|debug -options show | list | ls -m log shorewall6 trace|debugnolock -options start -n -f -c -T -i-C directory shorewall6 trace|debugnolock -options stop shorewall6 trace|debug -options status-i shorewall6 trace|debugnolock -options try directory timeout shorewall6 trace|debug -options update -b -d -r -T -a -D -i -t -A directory shorewall6 trace|debug -options version-a The shorewall6 utility is used to control the Shoreline Firewall 6 (Shorewall6). 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(5). Each v adds one to the effective verbosity and each q subtracts one from the effective VERBOSITY. Alternatively, 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. 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(5) file. A host-list is comma-separated list whose elements are host or network addresses. 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. Beginning with Shorewall 4.5.9, the dynamic_shared zone option (shorewall6-zones(5)) allows a single ipset to handle entries for multiple interfaces. When that option is specified for a zone, the add command has the alternative syntax in which the zone name precedes the host-list. allow Re-enables receipt of packets from hosts previously blacklisted by a drop, logdrop, reject, or logreject command. check Compiles the configuration 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. The -i option was added in Shorewall 4.6.0 and causes a warning message to be issued if the current line contains alternative input specifications following a semicolon (";"). Such lines will be handled incorrectly if INLINE_MATCHES is set to Yes in shorewall6.conf(5). 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. close { open-number | source dest [ protocol [ port ] ] } Added in Shorewall 4.5.8. This command closes a temporary open created by the open command. In the first form, an open-number specifies the open to be closed. Open numbers are displayed in the num column of the output of the shorewall6 show opens command. When the second form of the command is used, the parameters must match those given in the earlier open command. 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 presence 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 -c option was added in Shorewall 4.5.17 and causes conditional compilation of a script. The script specified by pathname (or implied if pathname is omitted) is compiled if it doesn't exist or if there is any file in the directory or in a directory on the CONFIG_PATH that has a modification time later than the file to be compiled. When no compilation is needed, a message is issued and an exit status of zero is returned. 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. The -i option was added in Shorewall 4.6.0 and causes a warning message to be issued if the current line contains alternative input specifications following a semicolon (";"). Such lines will be handled incorrectly if INLINE_MATCHES is set to Yes in shorewall6.conf(5). 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(5) file. A host-list is comma-separated list whose elements are a host or network address. Beginning with Shorewall 4.5.9, the dynamic_shared zone option (shorewall6-zones(5)) allows a single ipset to handle entries for multiple interfaces. When that option is specified for a zone, the delete command has the alternative syntax in which the zone name precedes the host-list. 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. Beginning with Shorewall 4.5.10, this command may be used with any optional network interface. interface may be either the logical or physical name of the interface. The command removes any routes added from shorewall6-routes(5) and any traffic shaping configuration for the interface. 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. The -c option causes the route cache to be dumped in addition to the other routing information. 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. Beginning with Shorewall 4.5.10, this command may be used with any optional network interface. interface may be either the logical or physical name of the interface. The command sets /proc entries for the interface, adds any route specified in shorewall6-routes(5) and installs the interface's traffic shaping configuration, if any. 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(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 log message destination is determined by the currently-selected IPv6 logging backend. 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. The -i option was added in Shorewall 4.6.0 and causes a warning message to be issued if the current line contains alternative input specifications following a semicolon (";"). Such lines will be handled incorrectly if INLINE_MATCHES is set to Yes in shorewall6.conf(5). 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 (5). logwatch Monitors the log file specified by the LOGFILE option in shorewall6.conf(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 (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 canceled. open source dest [ protocol [ port ] ] Added in Shorewall 4.6.8. This command requires that the firewall be in the started state and that DYNAMIC_BLACKLIST=Yes in shorewall6.conf (5). The effect of the command is to temporarily open the firewall for connections matching the parameters. The source and dest parameters may each be specified as all if you don't wish to restrict the connection source or destination respectively. Otherwise, each must contain a host or network address or a valid DNS name. The protocol may be specified either as a number or as a name listed in /etc/protocols. The port may be specified numerically or as a name listed in /etc/services. To reverse the effect of a successful open command, use the close command with the same parameters or simply restart the firewall. Example: To open the firewall for SSH connections to address 2001:470:b:227::1, the command would be: shorewall6 open all 2001:470:b:227::1 tcp 22 To reverse that command, use: shorewall6 close all 2001:470:b:227::1 tcp 22 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 -i option was added in Shorewall 4.6.0 and causes a warning message to be issued if the current line contains alternative input specifications following a semicolon (";"). Such lines will be handled incorrectly if INLINE_MATCHES is set to Yes in shorewall6.conf(5). The -D option was added in Shorewall 4.5.3 and causes Shorewall to look in the given directory first for configuration files. shorewall6 refresh net-fw nat:net_dnat reload 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 restart' 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 restarted via ssh. 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 -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. The -i option was added in Shorewall 4.6.0 and causes a warning message to be issued if the current line contains alternative input specifications following a semicolon (";"). Such lines will be handled incorrectly if INLINE_MATCHES is set to Yes in shorewall6.conf(5). 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(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. The -i option was added in Shorewall 4.6.0 and causes a warning message to be issued if the current line contains alternative input specifications following a semicolon (";"). Such lines will be handled incorrectly if INLINE_MATCHES is set to Yes in shorewall6.conf(5). The -C option was added in Shorewall 4.6.5 and is only meaningful when AUTOMAKE=Yes in shorewall6.conf(5). If an existing firewall script is used and if that script was the one that generated the current running configuration, then the running netfilter configuration will be reloaded as is so as to preserve the iptables packet and byte counters. 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(5). If your ip6tables ruleset depends on variables that are detected at run-time, either in your params file or by Shorewall-generated code, restore will use the values that were current when the ruleset was saved, which may be different from the current values. The -C option was added in Shorewall 4.6.5. If the -C option was specified during shorewall6 save, then the counters saved by that operation will be restored. run Added in Shorewall 4.6.3. Executes command in the context of the generated script passing the supplied parameters. Normally, the command will be a function declared in lib.private. Before executing the command, the script will detect the configuration, setting all SW_* variables and will run your init extension script with $COMMAND = 'run'. If there are files in the CONFIG_PATH that were modified after the current firewall script was generated, the following warning message is issued before the script's run command is executed: WARNING: /var/lib/shorewall6/firewall is not up to date 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. 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. 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(5). The -C option, added in Shorewall 4.6.5, causes the ip6tables packet and byte counters to be saved along with the chains and rules. savesets Added in shorewall 4.6.8. Performs the same action as the stop command with respect to saving ipsets (see the SAVE_IPSETS option in shorewall6.conf (5)). This command may be used to proactively save your ipset contents in the event that a system failure occurs prior to issuing a stop command. 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). bl|blacklists Added in Shorewall 4.6.2. Displays the dynamic chain along with any chains produced by entries in shorewall-blrules(5).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. capabilities Displays your kernel/ip6tables capabilities. The -f option causes the display to be formatted as a capabilities file for use with shorewall6 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 -b ('brief') option causes rules which have not been used (i.e. which have zero packet and byte counts) to be omitted from the output. Chains with no rules displayed are also omitted from the output. 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 Displays distribution-specific defaults. connections Displays the IP connections currently being tracked by the firewall. event event Added in Shorewall 4.5.19. Displays the named event. events Added in Shorewall 4.5.19. Displays all events. ip 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(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). opens Added in Shorewall 4.5.8. Displays the iptables rules in the 'dynamic' chain created through use of the open command.. 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. The -c option causes the route cache to be displayed in addition to the other routing information. tc 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(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(5). When LEGACY_FASTSTART=No, the modification 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 -c option was added in Shorewall 4.4.20 and performs the compilation step unconditionally, overriding the AUTOMAKE setting in shorewall6.conf(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. The -i option was added in Shorewall 4.6.0 and causes a warning message to be issued if the current line contains alternative input specifications following a semicolon (";"). Such lines will be handled incorrectly if INLINE_MATCHES is set to Yes in shorewall6.conf(5). The -C option was added in Shorewall 4.6.5 and is only meaningful when the -f option is also specified. If the previously-saved configuration is restored, and if the -C option was also specified in the save command, then the packet and byte counters will be restored along with the chains and rules. stop Stops the firewall. All existing connections, except those listed in shorewall6-routestopped(5) or permitted by the ADMINISABSENTMINDED option in shorewall6.conf(5), are taken down. The only new traffic permitted through the firewall is from systems listed in shorewall6-routestopped(5) or by ADMINISABSENTMINDED. status Produces a short report about the state of the Shorewall6-configured firewall. The -i option was added in Shorewall 4.6.2 and causes the status of each optional or provider interface to be displayed. 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 using the specified configuration directory; otherwise, a start command is performed using the specified configuration directory. If an error occurs during the compilation 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 (5) ) to be converted to entries in the blrules file (shorewall6-blrules (5) ). The blacklist keyword is removed from shorewall6-zones (5), shorewall6-interfaces (5) and shorewall6-hosts (5). The unmodified files are saved with a .bak suffix. The -D option was added in Shorewall 4.5.11. When this option is specified, the compiler will walk through the directories in the CONFIG_PATH replacing FORMAT and COMMENT entries to compiler directives (e.g., ?FORMAT and ?COMMENT). When a file is updated, the original is saved in a .bak file in the same directory. The -i option was added in Shorewall 4.6.0 and causes a warning message to be issued if the current line contains alternative input specifications following a semicolon (";"). Such lines will be handled incorrectly if INLINE_MATCHES is set to Yes in shorewall6.conf(5). The -t option was added in Shorewall 4.6.0. When specified, -t causes shorewall6-tcrules(5) to be converted to shorewall6-mangle(5). The old file is renamed with a .bak suffix. There are some notable restrictions with the -t option: Converted rules will be appended to the existing mangle file; if there is no mangle file in the CONFIG_PATH, one will be created in /etc/shorewall6. Existing comments in the tcrules file will not be transferred to the mangle file. INCLUDEd files will be expanded inline in the mangle file. Columns in the mangle file will be separated by a single tab character; there is no attempt made to otherwise align the columns. The -A option was added in Shorewall 4.6.0 and is equivalent to specifying the -b, -D and the -t options. 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. In general, when a command succeeds, status 0 is returned; when the command fails, a non-zero status is returned. The status command returns exit status as follows: 0 - Firewall is started. 3 - Firewall is stopped or cleared 4 - Unknown state; usually means that the firewall has never been started. http://www.shorewall.net/starting_and_stopping_shorewall.htm shorewall6-accounting(5), shorewall6-actions(5), shorewall6-blacklist(5), shorewall6-hosts(5), shorewall6-interfaces(5), shorewall6-maclist(5), shorewall6-netmap(5),shorewall6-params(5), shorewall6-policy(5), shorewall6-providers(5), shorewall6-rtrules(5), shorewall6-routestopped(5), shorewall6-rules(5), shorewall6.conf(5), shorewall6-secmarks(5), shorewall6-tcclasses(5), shorewall6-tcdevices(5), shorewall6-tcrules(5), shorewall6-tos(5), shorewall6-tunnels(5), shorewall6-zones(5)