private openstack Instances can not connect to the internet

Hello everyone,
I installed openstack folsom on my laptop. Everything is running smoothly, except for the internet. I can access to the internet when I SSH an instance with its fixed ip, but internet goes down when I associate a floating IP to the instance. Instances can not access to the internet, neither an instance can ping its own floating IP.
P.S I'm running openstack on a single node, my laptop has just 1 NIC.
I tried everything, but nothing worked :(

My Laptop IP: 10.80.3.211
fixed ips: 10.10.10.0/24
floating ips: 10.80.3.241/30

Below is my nova.conf file configuration.
[DEFAULT]

# LOG/STATE
verbose=True
logdir=/var/log/nova
state_path=/var/lib/nova
lock_path=/var/lock/nova
logging_context_format_string=%(asctime)s %(color)s%(levelname)s %(name)s [%(request_id)s %(user_name)s %(project_name)s%(color)s] %(instance)s%(color)s%(message)s
logging_default_format_string=%(asctime)s %(color)s%(levelname)s %(name)s [-%(color)s] %(instance)s%(color)s%(message)s
logging_debug_format_suffix=from (pid=%(process)d) %(funcName)s %(pathname)s:%(lineno)d
logging_exception_prefix=%(color)s%(asctime)s TRACE %(name)s %(instance)s

# AUTHENTICATION
use_deprecated_auth=false
auth_strategy=keystone
keystone_ec2_url=http://10.80.3.211:5000/v2.0/ec2tokens

# SCHEDULER
scheduler_driver=nova.scheduler.simple.SimpleScheduler
#compute_scheduler_driver=nova.scheduler.filter_scheduler.FilterScheduler

# DATABASE
sql_connection=mysql://nova:nova@10.80.3.211/nova_db

# NETWORK
dhcpbridge_flagfile=/etc/nova/nova.conf
dhcpbridge=/usr/bin/nova-dhcpbridge
network_manager=nova.network.manager.VlanManager
public_interface=eth0
vlan_interface=eth0
flat_interface=eth0
flat_network_bridge=br1
fixed_range=10.10.10.0/24
routing_source_ip=10.80.3.211
force_dhcp_release=True
iscsi_helper=ietadm
iscsi_ip_address=10.80.3.211
my_ip=10.80.3.211
multi_host=True
#firewall_driver=nova.virt.libvirt.firewall.IptablesFirewallDriver

# NOVNC
novnc_enabled=true
novncproxy_base_url=http://10.80.3.211:6080/vnc_auto.html
novncproxy_port=6080
xvpvncproxy_base_url=http://10.80.3.211:6081/console
vncserver_listen=0.0.0.0
vncserver_proxyclient_address=127.0.0.1

# APIs
osapi_compute_extension=nova.api.openstack.compute.contrib.standard_extensions
s3_host=10.80.3.211
ec2_host=10.80.3.211
ec2_dmz_host=10.80.3.211
cc_host=10.80.3.211
enabled_apis=ec2,osapi_compute,metadata
nova_url=http://10.80.3.211:8774/v1.1/
ec2_url=http://10.80.3.211:8773/services/Cloud
#volume_api_class=nova.volume.cinder.API
metadata_listen_port=8775
metadata_host=10.80.3.211
metadata_manager=nova.api.manager.MetadataManager
quota_metadata_items=128
metadata_listen=0.0.0.0
metadata_port=8775

# RABBIT
rabbit_host=10.80.3.211

# GLANCE
glance_api_servers=10.80.3.211:9292
image_service=nova.image.glance.GlanceImageService

# COMPUTE
#connection_type=libvirt
compute_driver=libvirt.LibvirtDriver
libvirt_type=kvm
libvirt_cpu_mode=none
allow_resize_to_same_host=True
libvirt_use_virtio_for_bridges=true
start_guests_on_host_boot=false
resume_guests_state_on_host_boot=false
api_paste_config=/etc/nova/api-paste.ini
rootwrap_config=/etc/nova/rootwrap.conf
#instance_name_template=instance-%08x

# CINDER
volume_api_class=nova.volume.cinder.API
osapi_volume_listen_port=5900

Please help, I guess I'm missing anything somewhere in the nova.conf file.