Provided by:
netscript-2.4_5.2.9ubuntu1_all 
NAME
netscript - netscript network configuration command
SYNOPSIS
netscript start|stop|reload|restart
netscript ifup|ifdown|ifqos|ifreload <interface-name>|all
netscript compile [ -fhq ] [ -b max-backup-level ]
netscript ipfilter load|clear|fairq|flush|reload|save
netscript ipfilter usebackup [ backup-number ]
netscript ipfilter exec <function-name1>|<function-name2> [chain p1 p2
...]
netscript ip6filter load|clear|fairq|flush|reload|save
netscript ip6filter usebackup [ backup-number ]
netscript ip6filter exec <function-name1>|<function-name2> [chain p1 p2
...]
DESCRIPTION
This manual page documents briefly the netscript command from the
netscript router/firewall network configuration package.
This command is used to configure/reconfigure the interface
configuration, ipchains filter setup, and ip route service ( QoS )
setup that are configured in netscript's configuration files. It can
manipulate individual interfaces, and reconfigure the iptables filter
contents and firewall setup, or reconfigure the QoS setup.
It is rather incomplete as it does not describe fully the finely tuned
manipulations that happen due to netscript's design which enables a
Linux box to serve as a high availability heavy-duty mission-critcial
network router or firewall.
COMPILE CONFIGURATION MODE
The rules can be compiled and automatically loaded on boot by setting
the IPV4_CONFIGURE_SWITCH switch in network.conf(5) to the value of
the function used to configure the kernel. Net-compile(8) creates this
function as 'Configure'. If this switch is set, the netscript
startup will run netscript-compile(8) to make sure everything is up
to date and load the rules from /etc/netscript/ipfilter-defs.conf,
and the relevant settings in network.conf(5) which are used to
establish packet grooming and configure the built in kernel netfilter
INPUT and FORWARD chains in the filter table. If compilation fails,
the previous rule set is not replaced and it is used instead.
A similar mode exists for IPv6, but it is not fully implemented yet.
IPTABLES CONFIGURATION MODE
This configuration mode corresponds to the old method of doing it using
iptables-save(8) and iptables-restore(8). This is the default for
operation, and occurs if the IPV4_CONFIGURE_SWITCH is not set in
network.conf(5).
This is the metoh still used by IPv6 as well.
OPTIONS
start Set up networking configruation by loading ipcahins filters,
setting up bridge, configuring interfaces and running any
configured lower layer protocol daemons or commands. For use
from a startup script.
stop Shut everything down. For use from a startup script.
reload Refresh the setup of netscript except for iptables from the
configuration files in /etc/netscript
restart|force-reload
Stop everthing and then start everything again. For use from a
startup script.
ifup <interface-name>|all
Bring interfaces(s) up by starting any protocol daemons, and
configuring interfaces.
ifdown <interface-name>|all
Shutdown said interface(s) by doing reverse of ifdown.
ifqos <interface-name>|all
Reload QoS configuration for interface(s).
ifreload <interface-name>|all
Refresh the interface setup and implement any configuration
changes.
ifreset <interface-name>|all
Shutdown and then restart interface(s), reloading configuration
from lower layer up to the network layer.
compile [ -fhq ] [ -b max-backup-level ]
Compile the new definitions in /etc/netscript/ipfilter-defs
directory into a new set of functions in the
/etc/netscript/ipfilter-defs-compiled.conf file. See the
netscript-compile(8) and ipfilter-defs(5) manpages for details.
ipfilter load|reload
Load/reload the IPv4 iptables filters and reconfigure the
firewalling, from that saved in /etc/netscript/iptables (via
iptables-restore(8) ), and the QoS fair queuing setup, or by
excuting the requisite configuration function from
/etc/netscript/ipfilter-defs-compiled.conf if using ipfilter-
defs(5) mode.
ipfilter save
Save the IPv4 iptables configuration to /etc/netscript/iptables
via iptables-save(8) , after backing it up to
/etc/netscript/iptables.1 and cycling the previous backup files
down through the configuration history. This does not work if
the IPv6 side of netscript is operating in ipfilter-defs(5)
mode.
ipfilter usebackup [ backup-number ]
Restore setup from the IPv4 iptables backup configuration from
/etc/netscript/iptables.n ( default 1 ) via iptables-restore(8),
or if the ipfilter-defs(5) backend is used, the requisite backup
number from the /etc/netscript/ipfilter-defs.conf history files.
ipfilter clear|flush
Remove iptables and any firewall setup, and if
IPV4_FWDING_KERNEL is set to FILTER_ON (see network.conf(5) ),
disables all IPv4 packet forwarding on the router. Very useful
for debugging protocol problems on a firewall by enabling a
reasonably safe check to be made with the filtering down.
ipfilter forward|fwd
Turns on the IPv4 kernel forwarding switch manually. This is
irrespective of the setting of IPV4_FWDING_KERNEL (see
network.conf(5) ). Use with caution as it will allow traffic
through the box.
ipfilter noforward|nofwd
Turns off the IPv4 kernel forwarding switch manually. This is
irrespective of the setting of IPV4_FWDING_KERNEL (see
network.conf(5) ). Use with caution as it will cut off
reachability.
ipfilter fairq
Reload the IPv4 fairq chain that marks the packets for the QoS
interface transmit queues.
ip6filter load|reload
Load/reload the IPv6 iptables filters and reconfigure the
firewalling, from that saved in /etc/netscript/ip6tables
(via ip6tables-restore(8) ), and the QoS fair queuing setup, or
by excuting the requisite configuration function from
/etc/netscript/ipfilter-defs-compiled.conf if using ipfilter-
defs(5) mode.
ip6filter save
Save the IPv6 iptables configuration to /etc/netscript/iptables
via ip6tables-save(8) , after backing it up to
/etc/netscript/ip6tables.1 and cycling the previous backup files
down through the configuration history. This does not work if
the IPv6 side of netscript is operating in ipfilter-defs(5)
mode.
ip6filter usebackup [ backup-number ]
Restore setup from the IPv6 iptables backup configuration from
/etc/netscript/ip6tables.n ( default 1 ) via ip6tables-
restore(8), or if the ipfilter-defs(5) backend is used, the
requisite backup number from the /etc/netscript/ipfilter-
defs.conf history files.
ip6filter clear|flush
Remove IPv6 iptables setup, and if IPV6_FWDING_KERNEL is set to
FILTER_ON (see network.conf(5) ), disables all IPv6 packet
forwarding on the router. Very useful for debugging protocol
problems on a firewall by enabling a reasonably safe check to be
made with the filtering down.
ip6filter forward|fwd
Turns on the IPv6 kernel forwarding switch manually. This is
irrespective of the setting of IPV6_FWDING_KERNEL (see
network.conf(5) ). Use with caution as it will allow traffic
through the box.
ip6filter noforward|nofwd
Turns off the IPv6 kernel forwarding switch manually. This is
irrespective of the setting of IPV6_FWDING_KERNEL (see
network.conf(5) ). Use with caution as it will affect
reachability.
ip6filter fairq
Reload the IPv6 fairq chain that marks the packets for the QoS
interface transmit queues.
FILES
/etc/netscript/if.conf, /etc/netscript/ipfilter.conf,
/etc/netscript/network.conf, /etc/netscript/qos.conf,
/etc/netscript/ipfilter-defs.conf,
/etc/netscript/ipfilter-defs-compiled.conf,
/etc/netscript/ipfilter-defs directory,
/etc/netscript/iptables, /etc/netscript/ip6tables,
/etc/netscript/ipfilter-defs-compiled
SEE ALSO
netscript-compile(8), ipfilter-defs(5), if.conf(5), ipfilter.conf(5),
network.conf(5), qos.conf(5), ip(8), tc(8), iptables(8), iptables-
restore(8), iptables-save(8), ip6tables(8), ip6tables-restore(8),
ip6tables-save(8), brcfg(8).
AUTHOR
This manual page was written by Matthew Grant
<grantma@anathoth.gen.nz>, for the Debian GNU/Linux system (but may be
used by others).
BUGS
I wrote this manpage when I was half asleep...
January 24, 2003 NET(8)