Brandvägg i linux?

Vad ska jag ändra här för att jag ska låta folk kunna komma in på hemsidan min?

########################################
# -- Advanced Configuration Options -- #
########################################

# ** DO NOT ** modify anything below unless you know what you are doing!!
# See online documentation at: http://projectfiles.com/firewall/config.html

DENY_OUTBOUND=""
ALLOW_INBOUND="85.228.8.204:80"
BLACKLIST=""
STATIC_INSIDE_OUTSIDE=""
PORT_FORWARDS=""
PORT_FWD_ALL="yes"
PORT_FWD_ROUTED_NETWORKS="yes"
ADDITIONAL_ROUTED_NETWORKS=""
TRUST_ROUTED_NETWORKS="yes"
SHARED_INTERNAL="yes"
FIREWALL_IP=""
TRUST_LOCAL_EXTERNAL_NETWORKS="yes"
DMZ_INTERFACES=""
NAT_EXTERNAL="yes"
ADDITIONAL_NAT_INTERFACES=""
IGNORE_INTERFACES=""
LOGGING="no"
REQUIRE_EXTERNAL_CONFIG="no"

############################################
# -- Advanced Firewall Behavior Options -- #
############################################

# The default settings provide the suggested firewall configuration.

NO_RP_FILTER_INTERFACES=""
INTERNAL_DHCP="yes"
RFC_1122_COMPLIANT="yes"
DROP_NEW_WITHOUT_SYN="no"
DUMP_TCP_ON_INIT="no"
TTL_STEALTH_ROUTER="no"
LOG_LIMIT="1/minute"
LOG_BURST="5"
LOG_LEVEL="notice"

Jo men det funkar inte med : i början.

Vet du nått annat jag kan skriva?

EXTIF=eth0
for f in /proc/sys/net/ipv4/conf/*/rp_filter ; do echo 1 > $f ; done
iptables -F
iptables -X
iptables -P INPUT DROP
iptables -P OUTPUT ACCEPT
iptables -A INPUT -i lo -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT
iptables -A INPUT -i $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A INPUT -p tcp -i $EXTIF --dport 80 -j ACCEPT

Jo fast jag har en dosare eller ddosare mot sidan så den låter personen fortfarande hacka

Snälla kan ni hjälpa mig?