Error: no module named taggit

I had this problem on a ubuntu. It turns I installed pip using easy-install3 which is for python3. So pip installed taggit for Phython3 and the default python is 2.7.

iptables (Flow)

incoming - packet from outside to this host
outgoing - packet from this host to outside
forwarding - host acting as a router, packet passthrough this  host from one interface to another.

https://www.digitalocean.com/community/tutorials/a-deep-dive-into-iptables-and-netfilter-architecture
http://content.hccfl.edu/pollock/AUnixSec/IptablesOverview.htm
http://www.adminsehow.com/2011/09/iptables-packet-traverse-map/
http://stuffphilwrites.com/wp-content/uploads/2014/09/FW-IDS-iptables-Flowchart-2014-09-25.png
ftp://ftp.shorewall.net/pub/shorewall/misc/netfilterflow.pdf

Fake Mac Address with macchanger

service NetworkManager stop

macchanger interface --mac=aa:bb:cc:dd:ee:ff

service NetworkManager start

ip dhcp snooping

http://packetlife.net/blog/2010/aug/18/dhcp-snooping-and-dynamic-arp-inspection/

Cisco Catalyst Port Mirroring

no monitor session 1

monitor session 1 source interface gi0/5
monitor session 1 destination interface gi0/8 ingress dot1q vlan 30

 #show mon
Session 1
---------
Type                   : Local Session
Source Ports           :
    Both               : Gi0/5
Destination Ports      : Gi0/8
    Encapsulation      : Native
          Ingress      : Enabled, default VLAN = 30
    Ingress encap : DOT1Q




 # ! or... untagged
 no monitor session 1
monitor session 1 source interface gi0/5
monitor session 1 destination interface gi0/8 ingress vlan 30

#do show mon                                                  
Session 1
---------
Type                   : Local Session
Source Ports           :
    Both               : Gi0/5
Destination Ports      : Gi0/8
    Encapsulation      : Native
          Ingress      : Enabled, default VLAN = 30
    Ingress encap : Untagged