source: hybrid/branches/releng-9.0/nanobsd/files/etc/ipfw.sh@ 10199

#!/bin/sh -

# Based on /etc/rc.firewall

# Suck in the configuration variables.
if [ -z "${source_rc_confs_defined}" ]; then
        if [ -r /etc/defaults/rc.conf ]; then
                . /etc/defaults/rc.conf
                source_rc_confs
        elif [ -r /etc/rc.conf ]; then
                . /etc/rc.conf
        fi
fi

setup_loopback () {
        ############
        # Only in rare cases do you want to change these rules
        #
        ${fwcmd} add 100 pass all from any to any via lo0
        ${fwcmd} add 200 deny all from any to 127.0.0.0/8
        ${fwcmd} add 300 deny ip from 127.0.0.0/8 to any
}

############
# Set quiet mode if requested
#
case ${firewall_quiet} in
[Yy][Ee][Ss])
        fwcmd="/sbin/ipfw -q"
        ;;
*)
        fwcmd="/sbin/ipfw"
        ;;
esac

############
# Flush out the list before we begin.
#
${fwcmd} -f flush

setup_loopback

############

# By default no firewalling
${fwcmd} add 65000 pass all from any to any

# Transproxy/WLportal/Captive portal
${fwcmd} add 10000 allow tcp from any to localhost 80
${fwcmd} add 10001 allow tcp from any to me 80

############
# Reserved: Whitelist rule numbers
# 10002 - 10009
NR=10002
  for IP in $captive_portal_whitelist; do
  ${fwcmd} add $NR allow tcp from $IP to not 172.16.0.0/12 dst-port 80
  NR=`expr $NR + 1`
done

############
# Reserved: WLPortal rule numbers
# 10010 - 10099

# Forward rules work without a base address, so needed a loop over all inet4 adresses
for INF in $captive_portal_interfaces; do
  ${fwcmd} add 10100 fwd 172.31.255.1,8081 tcp from any to not 172.16.0.0/12 80 in via ${INF}
done