SHOREWALL(8) [FIXME: manual] SHOREWALL(8)
NAME
shorewall - Administration tool for Shoreline Firewall (Shorewall)
SYNOPSIS
shorewall [trace|debug [nolock]] [-options] add interface[:host-list]... zone
shorewall [trace|debug [nolock]] [-options] allow address
shorewall [trace|debug] [-options] check [-e] [-d] [-p] [-r] [-T] [directory]
shorewall [trace|debug [nolock]] [-options] clear [-f]
shorewall [trace|debug] [-options] compile [-e] [-d] [-p] [-T] [directory] [pathname]
shorewall [trace|debug [nolock]] [-options] delete interface[:host-list]... zone
shorewall [trace|debug [nolock]] [-options] disable { interface | provider }
shorewall [trace|debug [nolock]] [-options] drop address
shorewall [trace|debug] [-options] dump [-x] [-l] [-m]
shorewall [trace|debug [nolock]] [-options] enable { interface | provider }
shorewall [trace|debug [nolock]] [-options] export [directory1] [user@]system[:directory2]
shorewall [trace|debug [nolock]] [-options] forget [filename]
shorewall [trace|debug] [-options] help
shorewall [trace|debug] [-options] hits [-t]
shorewall [trace|debug] [-options] ipcalc {address mask | address/vlsm}
shorewall [trace|debug] [-options] iprange address1-address2
shorewall [trace|debug] [-options] iptrace iptables match expression
shorewall [trace|debug] [-options] load [-s] [-c] [-r root-user-name] [-T] [directory] system
shorewall [trace|debug [nolock]] [-options] logdrop address
shorewall [trace|debug] [-options] logwatch [-m] [refresh-interval]
shorewall [trace|debug [nolock]] [-options] logreject address
shorewall [trace|debug] [-options] noiptrace iptables match expression
shorewall [trace|debug [nolock]] [-options] refresh [-n] [-d] [-T] [-D directory ] [chain...]
shorewall [trace|debug [nolock]] [-options] reject address
shorewall [trace|debug] [-options] reload [-s] [-c] [-r root-user-name] [-T] [directory] system
shorewall [trace|debug [nolock]] [-options] reset
shorewall [trace|debug [nolock]] [-options] restart [-n] [-p [-d]] [-f] [-c] [-T] [directory]
shorewall [trace|debug [nolock]] [-options] restore [filename]
shorewall [trace|debug [nolock]] [-options] safe-restart [-d] [-p] [-t timeout] [directory]
shorewall [trace|debug] [-options] safe-start [-d] [-p] [-t timeout] [directory]
shorewall [trace|debug [nolock]] [-options] save [filename]
shorewall [trace|debug] [-options] show [-x] [-l] [-t {filter|mangle|nat|raw|rawpost}] [[chain] chain...]
shorewall [trace|debug] [-options] show [-f] capabilities
shorewall [trace|debug] [-options] show {actions|classifiers|connections|config|filters|ip|ipa|macros|zones|policies|marks}
shorewall [trace|debug] [-options] show macro macro
shorewall [trace|debug] [-options] show [-x] {mangle|nat|routing|raw|rawpost}
shorewall [trace|debug] [-options] show tc
shorewall [trace|debug] [-options] show [-m] log
shorewall [trace|debug [nolock]] [-options] start [-n] [-f] [-p] [-c] [-T] [directory]
shorewall [trace|debug [nolock]] [-options] stop [-f]
shorewall [trace|debug] [-options] status
shorewall [trace|debug [nolock]] [-options] try directory [timeout]
shorewall [trace|debug] [-options] update [-b] [-d] [-r] [-T] [-a] [directory]
shorewall [trace|debug] [-options] version [-a]
DESCRIPTION
The shorewall utility is used to control the Shoreline Firewall (Shorewall).
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 Shorewall lockfile. It is useful if you need to include shorewall
commands in /etc/shorewall/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 shorewall.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
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 shorewall-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/shorewall is assumed.
The -e option causes the compiler to look for a file named capabilities. This file is produced using the command shorewall-lite show -f
capabilities > capabilities on a system with Shorewall 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 Shorewall. 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.
If -f is given, the command will be processed by the compiled script that executed the last successful start, restart or refresh
command if that script exists.
compile
Compiles the current configuration into the executable file pathname. If a directory is supplied, Shorewall 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., shorewall -v-1 compile -- -) to suppress the 'Compiling...' message normally generated by /sbin/shorewall.
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 shorewall-lite show -f capabilities >
capabilities on a system with Shorewall 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
The delete command reverses the effect of an earlier add command.
The interface argument names an interface defined in the shorewall-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 Shorewall 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 shorewall script and stage it on a system (provided that the user has access to the system via
ssh). The command is equivalent to:
/sbin/shorewall 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/shorewall/filename and /var/lib/shorewall/save. If no filename is given then the file specified by RESTOREFILE in
shorewall.conf[1](5) is assumed.
help
Displays a syntax summary.
hits
Generates several reports from Shorewall log messages in the current log file. If the -t option is included, the reports are restricted
to log messages generated today.
ipcalc
Ipcalc displays the network address, broadcast address, network in CIDR notation and netmask corresponding to the input[s].
iprange
Iprange decomposes the specified range of IP addresses into the equivalent list of network/host addresses.
iptrace
This is a low-level debugging command that causes iptables TRACE log records to be created. See iptables(8) for details.
The iptables 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 shorewall 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/shorewall compile -e directory directory/firewall &&
scp directory/firewall directory/firewall.conf root@system:/var/lib/shorewall-lite/ &&
ssh root@system '/sbin/shorewall-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, Shorewall Lite on system is started via ssh.
If -s is specified and the start command succeeds, then the remote Shorewall-lite configuration is saved by executing shorewall-lite
save via ssh.
if -c is included, the command shorewall-lite show capabilities -f > /var/lib/shorewall-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 shorewall.conf[1] (5).
logwatch
Monitors the log file specified by the LOGFILE option in shorewall.conf[1](5) and produces an audible alarm when new Shorewall 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., shorewall 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 shorewall.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. If no chain is given, the static blacklisting chain blacklst is assumed.
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:
shorewall refresh net2fw nat:net_dnat #Refresh the 'net2loc' chain in the filter table and the 'net_dnat' chain in the nat table
The refresh command has slightly different behavior. 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/shorewall/tcrulesand install the changes using refresh.
reload
If directory is omitted, the current working directory is assumed. Allows a non-root user to compile a shorewall 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/shorewall compile -e directory directory/firewall &&
scp directory/firewall directory/firewall.conf root@system:/var/lib/shorewall-lite/ &&
ssh root@system '/sbin/shorewall-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, Shorewall Lite on system is restarted via ssh.
If -s is specified and the restart command succeeds, then the remote Shorewall-lite configuration is saved by executing shorewall-lite
save via ssh.
if -c is included, the command shorewall-lite show capabilities -f > /var/lib/shorewall-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.
reset
All the packet and byte counters in the firewall are reset.
restart
Restart is similar to shorewall start except that it assumes that the firewall is already started. Existing connections are maintained.
If a directory is included in the command, Shorewall will look in that directory first for configuration files.
The -n option causes Shorewall 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/shorewall 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
shorewall.conf[1](5). When both -f and -care 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 Shorewall to a state saved using the shorewall save command. Existing connections are maintained. The filename names a restore
file in /var/lib/shorewall created using shorewall save; if no filename is given then Shorewall will be restored from the file
specified by the RESTOREFILE option in shorewall.conf[1](5).
safe-restart
Only allowed if Shorewall is running. The current configuration is saved in /var/lib/shorewall/safe-restart (see the save command
below) then a shorewall 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 Shorewall 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
Shorewall 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 shorewall clear is
performed for you. If a directory is given, then Shorewall 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/shorewall/save. The state of the firewall is stored in /var/lib/shorewall/filename for use
by the shorewall restore and shorewall -f start commands. If filename is not given then the state is saved in the file specified by the
RESTOREFILE option in shorewall.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/iptables 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 iptables -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 iptables 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.
ip
Displays the system's IPv4 configuration.
ipa
Added in Shorewall 4.4.17. Displays the per-IP accounting counters (shorewall-accounting[3] (5)).
log
Displays the last 20 Shorewall messages from the log file specified by the LOGFILE option in shorewall.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.
macro
Added in Shorewall 4.4.6. Displays the file that implements the specified macro (usually /usr/share/shorewall/macro.macro).
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).
nat
Displays the Netfilter nat table using the command iptables -t nat -L -n -v.The -x option is passed directly through to iptables
and causes actual packet and byte counts to be displayed. Without this option, those counts are abbreviated.
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 IPv4 routing configuration.
raw
Displays the Netfilter raw table using the command iptables -t raw -L -n -v.The -x option is passed directly through to iptables
and causes actual packet and byte counts to be displayed. Without this option, those counts are abbreviated.
tc
Displays information about queuing disciplines, classes and filters.
zones
Displays the current composition of the Shorewall zones on the system.
start
Start shorewall. Existing connections through shorewall 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, Shorewall will look in that directory first
for configuration files. If -f is specified, the saved configuration specified by the RESTOREFILE option in shorewall.conf[1](5) will
be restored if that saved configuration exists and has been modified more recently than the files in /etc/shorewall. When -f is given,
a directory may not be specified.
Update: In Shorewall 4.4.20, a new LEGACY_FASTSTART option was added to shorewall.conf[1](5). When LEGACY_FASTSTART=No, the
modificaiotn times of files in /etc/shorewall are compared with that of /var/lib/shorewall/firewall (the compiled script that last
started/restarted the firewall).
The -n option causes Shorewall 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 -c option was added in Shorewall 4.4.20 and performs the compilation step unconditionally, overriding the AUTOMAKE setting in
shorewall.conf[1](5). When both -f and -care 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.
stop
Stops the firewall. All existing connections, except those listed in shorewall-routestopped[4](5) or permitted by the
ADMINISABSENTMINDED option in shorewall.conf[1](5), are taken down. The only new traffic permitted through the firewall is from systems
listed in shorewall-routestopped[4](5) or by ADMINISABSENTMINDED.
If -f is given, the command will be processed by the compiled script that executed the last successful start, restart or refresh
command if that script exists.
status
Produces a short report about the state of the Shorewall-configured firewall.
try
If Shorewall is started then the firewall state is saved to a temporary saved configuration (/var/lib/shorewall/.try). Next, if
Shorewall 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 Shorewall state. If an error occurs during the
restart phase, then a shorewall restore is performed using the saved configuration. If an error occurs during the start phase, then
Shorewall 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/shorewall/shorewall.conf then validate the configuration. The update
will add options not present in the old 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 shorewall.conf file is renamed shorewall.conf.bak.
The -a option causes the updated shorewall.conf file to be annotated with documentation.
The -b option was added in Shorewall 4.4.26 and causes legacy blacklisting rules (shorewall-blacklist[5] (5) ) to be converted to
entries in the blrules file (shorewall-blrules[6] (5) ). The blacklist keyword is removed from shorewall-zones[7] (5),
shorewall-interfaces[2] (5) and shorewall-hosts[8] (5). The unmodified files are saved with a .bak suffix.
For a description of the other options, see the check command above.
version
Displays Shorewall's version. The -a option is included for compatibility with earlier Shorewall releases and is ignored.
FILES
/etc/shorewall/
SEE ALSO
http://www.shorewall.net/starting_and_stopping_shorewall.htm
shorewall-accounting(5), shorewall-actions(5), shorewall-blacklist(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-tcrules(5), shorewall-tos(5), shorewall-tunnels(5),
shorewall-zones(5)
NOTES
1. shorewall.conf
http://www.shorewall.net/manpages/shorewall.conf.html
2. shorewall-interfaces
http://www.shorewall.net/manpages/shorewall-interfaces.html
3. shorewall-accounting
http://www.shorewall.net/manpages/manpages/shorewall-accounting.html
4. shorewall-routestopped
http://www.shorewall.net/manpages/shorewall-routestopped.html
5. shorewall-blacklist
http://www.shorewall.net/manpages/shorewall-blacklist.html
6. shorewall-blrules
http://www.shorewall.net/manpages/shorewall-blrules.html
7. shorewall-zones
http://www.shorewall.net/manpages/shorewall-zones.html
8. shorewall-hosts
http://www.shorewall.net/manpages/shorewall-hosts.html
[FIXME: source] 06/28/2012 SHOREWALL(8)