netscript8

Usage

Overview

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.

Iptables configuration

Configuration saving is done by iptables-save(8) and iptables-restore(8).

Options

start

Set up networking configuration by loading iptables 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 kernel modules) from the configuration files in /etc/netscript

restart|force-reload

Stop everything 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.

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.

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.

ipfilter usebackup [ backup-number ]

Restore setup from the IPv4 iptables backup configuration from /etc/netscript/iptables.n ( default 1 ) via iptables-restore(8).

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.

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.

ip6filter usebackup [ backup-number ]

Restore setup from the IPv6 iptables backup configuration from /etc/netscript/ip6tables.n ( default 1 ) via ip6tables-restore(8).

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/iptables, /etc/netscript/ip6tables,