uif 1.1.4-2 / postinst

#!/bin/sh

set -e

# Source debconf library.
. /usr/share/debconf/confmodule

# We exit unless the package is being configured
case "$1" in
        abort*upgrade)         exit 0;;
        abort*remove)          exit 0;;
        abort*deconfigure)     exit 0;;
        configure) ;;
        *)                     exit 0;
esac

# Check their answer.
db_get uif/conf_method

case "$RET" in
	workstation)
		PINGS=0
		TRACERT=0
		TRUSTED=""
		
		# show message
		db_get uif/workstation

		# configure ping / traceroutes
		db_get uif/pings
		
		[ "$RET" = "true" ] && PINGS=1

		db_get uif/traceroute

		[ "$RET" = "true" ] && TRACERT=1

		# configure trusted hosts
		db_get uif/trusted

		if [ -n "$RET" ]; then
			TRUSTED="$TRUSTED $RET"
		fi

		if [ "$PINGS" = "1" -o "$TRACERT" = "1" ]; then
			ICMP_RULE="in+  p="
		else
			ICMP_RULE="#in+  p=ping,traceroute"
		fi
		[ "$PINGS" = "1" ] && ICMP_RULE="${ICMP_RULE}ping"
		[ "$PINGS" = "1" -a "$TRACERT" = "1" ] && ICMP_RULE="${ICMP_RULE},"
		[ "$TRACERT" = "1" ] && ICMP_RULE="${ICMP_RULE}traceroute"
		if [ -n "$TRUSTED" ]; then
			TRUSTED="trusted4    $TRUSTED"
			TRUSTED_RULE="in+  s=trusted4(4)"
		else
			TRUSTED="#trusted4    10.0.0.1"
			TRUSTED_RULE="#in+  s=trusted4(4)"
		fi

		if [ -f /etc/uif/uif.conf ]; then
			echo "Backing up your old uif.conf to uif.conf.old..."
			cp /etc/uif/uif.conf /etc/uif/uif.conf.old
		fi

		cat > /etc/uif/uif-ipv4-networks.inc <<EOF
## IPv4 network name definitions for UIF

## automatically configured for Debian systems...
## This file has been automatically generated by debconf. It will be overwritten
## the next time you configure firewall without choosing "don't touch".

#  In the network section you're asked to provide informations on all
#  IPv4 hosts and/or networks running in your setup.
#
#  syntax: net_name [ip-address[=mac-address]] [network] [net_name]
#  examples: webserver 192.168.1.5
#            intranet  10.1.0.0/16
#            dmz       10.5.0.0/255.255.0.0
#            some      intranet dmz 10.2.1.1
#            router    10.1.0.1=0A:32:F2:C7:1A:31

network {
    localhost   127.0.0.1
    all         0.0.0.0/0
    $TRUSTED
}
EOF

		cat > /etc/uif/uif-ipv6-networks.inc <<EOF
## IPv6 network name definitions for UIF

## automatically configured for Debian systems...
## This file has been automatically generated by debconf. It will be overwritten
## the next time you configure firewall without choosing "don't touch".

#  In the network section you're asked to provide informations on all
#  IPv6 hosts and/or networks running in your setup.
#
#  syntax: net_name [ip-address[=mac-address]] [network] [net_name]
#  examples: webserver 2001:610:1908:b000::148:14
#            intranet  fd00:0:0:1::/64
#            dmz       fd00:0:0:5::/64
#            some      intranet dmz fd00:0:2:1::1
#            router    fd00:0:0:1::1=0A:32:F2:C7:1A:31

network {
    localhost   ::1
    all         ::/0
#   trusted6     fd00:1:2:3::/64
}
EOF

		cat > /etc/uif/uif.conf << EOF
## uif Firewall Configuration

## automatically configured for Debian systems...
## This file has been automatically generated by debconf. It will be overwritten
## the next time you configure firewall without choosing "don't touch".

## Sysconfig definitions
#  These entries define the global behaviour of the firewall package. Normally
#  they are preset in /etc/default/uif and may be overwritten by this
#  section.
#
#  syntax:   LogLevel : set the kernel loglevel for iptables rules
#            LogPrefix: prepend this string to all iptables logs
#            LogLimit:  set packet limit per time interval (times/interval)
#            LogBurst:  set packet log burst
#  example:
#   sysconfig {
#      LogLevel      debug
#      LogPrefix     FW
#      LogLimit      20/minute
#      LogBurst      5
#      AccountPrefix ACC_
#   }


## Include predefined services
#  The include section takes a bunch of files and includes them into this
#  configuration file.
#
#  syntax:  "filename"
include {
    "/etc/uif/services"
}


## Services needed for workstation setup
#  The service section provides the protocol definitions you're
#  using in the rules. You're forced to declare everything you
#  need for your setup.
#
#  syntax: service_name [tcp([source:range]/[dest:range])] [udp([source:range]/[dest:range])]
#                       [protocol_name([source:range][/][dest:range])] [service_name] ...
#  examples: http  tcp(/80)
#            dns   tcp(/53) udp(/53)
#            group http dns tcp(/443)
#            ipsec esp(/) udp(/500)
#service {
#    traceroute  udp(32769:65535/33434:33523) icmp(11)
#    ping        icmp(8)
#}

## Network definitions needed for IPv4+6 workstation setup
# The network definitions are included from two separate files.
#   1. /etc/uif/uif-ipv4-networks.inc
#   2. /etc/uif/uif-ipv6-networks.inc
#
# If you want to setup IPv4 and IPv6 firewalling easily,
# make sure that all network names you use in your ruleset
# in both include files.
#
# Additionally make /etc/uif/uif6.conf a symlink that points to
# /etc/uif/uif.conf.
#

# IPv4 network definitions
#
# If you update from a version of UIF that supported IPv4 only, then
# you probably want to leave the uif.conf file untouched for now and
# move your network definitions block from uif.conf to uif-ipv4-networks.inc
# manually later.

include4 {
    "/etc/uif/uif-ipv4-networks.inc"
}

# IPv6 network definitions
#
# Make sure IPV6MODE is set to 1 in /etc/default/uif if you want to use
# IPv6 support on your UIF based firewall.

include6 {
    "/etc/uif/uif-ipv6-networks.inc"
}

## Interface definitions
#  Since all definitions used in the filter section are symbolic,
#  you've to specify symbolic names for all your interfaces you're
#  going to use.
#
#  syntax: interface_name [unix network interface] [interface_name]
#  examples: internal eth0
#            external ippp0 ipsec0
#            allppp   ppp+
#            group    external allppp eth3
interface {
    loop     lo
}

## Filter definitions
#  The filter section defines the rules for in, out, forward, masquerading
#  and nat. All rules make use of the symbolic names defined above. This
#  section can be used multiple times in one config file. This makes more
#  senese when using one of these alias names:
#  filter, nat, input, output, forward, masquerade
#
#  syntax: in[-/+]  [i=interface] [s=source_net] [d=dest_net] [p=protocol] [f=flag_1,..,flag_n]
#          out[-/+] [o=interface] [s=source_net] [d=dest_net] [p=protocol] [f=flag_1,..,flag_n]
#          fw[-/+]  [i/o=interface][s=source_net] [d=dest_net] [p=protocol] [f=flag_1,..,flag_n]
#          masq[-/+][i/o=interface][s=source_net] [d=dest_net] [p=protocol] [f=flag_1,..,flag_n]
#          nat[-/+] additionally allows [S=from source] [D=to destination] [P=to port:[range]]
#  flags:  limit([count/time[,burst]])
#          reject([reject type])
#          log([name])
#          account(name)
#  examples:
#       masq+  o=extern s=intranet
#       nat+   s=intranet p=http   D=relayintern   P=squid
#       in+    s=trusted  p=ssh,ping,traceroute,http
#       out-   s=intranet p=smb    f=reject
#       fw-    d=microsoft         f=reject,log(ms-alert)
#       fw+    p=myhttp            f=account(HTTP)
#              Take an attention about the protocol for your accounting rules. If you
#              want to count user http traffice, you may need a "myhttp tcp(80/)".
filter {
    in+  i=loop    s=localhost
    out+ o=loop    d=localhost

    # IPv4 rules
    $ICMP_RULE
    $TRUSTED_RULE

    # ICMP is a must in IPv6, blocking breaks compliancy
    # to RFC 4443 (http://tools.ietf.org/html/rfc4443)
    in+  s=all(6) p=ping,pong,noroute,packet-too-big,time-exceeded,parameter-problem,neighbor-advertisement,neighbor-solicitation
    #in+ s=trusted6(6)

    out+ d=all

    in-  f=log(input),reject
    out- f=log(output),reject
    fw-  f=log(forward),reject
}
EOF
	;;

	*)
	;;

esac

# protect the uif configuration files against other users
chmod 600 /etc/uif/uif.conf
chmod 600 /etc/uif/uif-ipv*-networks.inc

# Automatically added by dh_installinit
if [ -x "/etc/init.d/uif" ]; then
	update-rc.d uif defaults >/dev/null
fi
if [ -x "/etc/init.d/uif" ] || [ -e "/etc/init/uif.conf" ]; then
	invoke-rc.d uif start || exit $?
fi
# End automatically added section


exit 0