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(5) file. A host-list is comma-separated list whose elements are host or network addresses.

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

Clear will remove all rules and chains installed by Shorewall-lite. 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.

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 shorewall-lite show opens command.

When the second form of the command is used, the parameters must match those given in the earlier open command.

The delete command reverses the effect of an earlier add command.

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

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.

Causes traffic from the listed addresses to be silently dropped.

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-lite 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.

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.

Deletes /var/lib/shorewall-lite/filename and /var/lib/shorewall-lite/save. If no filename is given then the file specified by RESTOREFILE in shorewall.conf(5) is assumed.

Displays a syntax summary.

Generates several reports from Shorewall-lite log messages in the current log file. If the -t option is included, the reports are restricted to log messages generated today.

Ipcalc displays the network address, broadcast address, network in CIDR notation and netmask corresponding to the input[s].

Iprange decomposes the specified range of IP addresses into the equivalent list of network/host addresses.

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 facility = kernel and priority = warning, and they are routed from there by your logging daemon (syslogd, rsyslog, syslog-ng, ...) -- Shorewall-lite has no control over where the messages go; consult your logging daemon's documentation.

list is a synonym for show -- please see below.

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 (5).

Monitors the log file specified by the LOGFILE option in shorewall.conf(5) and produces an audible alarm when new Shorewall-lite 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-lite logwatch -- -30). In this case, when a packet count changes, you will be prompted to hit any key to resume screen refreshes.

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 (5).

ls is a synonym for show -- please see below.

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.

Added in Shorewall 4.6.8. This command requires that the firewall be in the started state and that DYNAMIC_BLACKLIST=Yes in shorewall.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 192.168.1.1, the command would be:

    shorewall-lite open all 192.168.1.1 tcp 22

To reverse that command, use:

    shorewall-lite close all 192.168.1.1 tcp 22

Causes traffic from the listed addresses to be silently rejected.

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 is similar to shorewall-lite start except that it assumes that the firewall is already started. Existing connections are maintained.

The -n option causes Shorewall-lite 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 4.6.5. If the specified (or implicit) firewall script is 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 Shorewall-lite to a state saved using the shorewall-lite save command. Existing connections are maintained. The filename names a restore file in /var/lib/shorewall-lite created using shorewall-lite save; if no filename is given then Shorewall-lite will be restored from the file specified by the RESTOREFILE option in shorewall.conf(5).

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

The -p option, added in Shorewall 4.6.5, 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 4.6.5. If the -C option was specified during shorewall save, then the counters saved by that operation will be restored.

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'.

The dynamic blacklist is stored in /var/lib/shorewall-lite/save. The state of the firewall is stored in /var/lib/shorewall-lite/filename for use by the shorewall-lite restore. If filename is not given then the state is saved in the file specified by the RESTOREFILE option in shorewall.conf(5).

The -C option, added in Shorewall 4.6.5, causes the iptables packet and byte counters to be saved along with the chains and rules.

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 shorewall.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.

The show command can have a number of different arguments:

Start Shorewall Lite. Existing connections through shorewall-lite managed interfaces are untouched. New connections will be allowed only if they are allowed by the firewall rules or policies.

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

The -n option prevents the firewall script from modifying the current routing configuration.

The -f option was added in Shorewall 4.6.5. If the RESTOREFILE named in shorewall.conf(5) exists, is executable and is not older than the current filewall script, then that saved configuration is restored.

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.

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

Produces a short report about the state of the Shorewall-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.

Displays Shorewall's version. The -a option is included for compatibility with earlier Shorewall releases and is ignored.