Seguridad y Redes

Para conectar nuestro emulador GNS3 hacia internet, debemos de tener una interface de bucle invertido (Loopback) y una interface física, en este ejemplo lo realice con la interface wireless de mi laptop. En el video se muestran los pasos de realizar la configuración.

GNS3 >> Nuestra PC >> ADSL Router >> Internet

Router - FastEthernet0/0   > 192.168.137.2 255.255.255.0
Interface Loopback            > 192.168.137.1 255.255.255.0
Interface Wireless             > 192.168.1.102 255.255.255.0   >>  Default Gateway 192.168.1.254
La dirección IP de la interface wireless fue asignado por DHCP del Router Huawei EchoLife HG520c que tiene Default Gateway la IP 192.168.1.254.

Iniciamos GNS3, configuramos la interface Loopback e iniciamos el Router. Enseguida le configuramos la IP al Router y verificamos la conectividad con la interface Loopback.

R1#conf t
R1(config)#int f0/0
R1(config-if)#ip address 192.168.137.2 255.255.255.0
R1(config-if)#no shut
R1(config-if)#end
R1#ping 192.168.137.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.137.1, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 4/30/80 ms
R1#
R1#conf t
R1(config)#ip route 0.0.0.0 0.0.0.0 192.168.137.1
R1(config)#end
R1#ping 192.168.1.102
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.102, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/16/52 ms
R1#ping 192.168.1.254
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.254, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/30/96 ms
R1#ping www.google.com
Translating "www.google.com"
% Unrecognized host or address, or protocol not running.

R1#conf t
R1(config)#ip domain-lookup
R1(config)#ip name-server 192.168.1.254
R1(config)#do ping www.google.com

Translating "www.google.com"...domain server (192.168.1.254) [OK]
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 74.125.227.146, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 52/135/208 ms

R1(config)#do ping www.google.com
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 74.125.227.146, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 60/108/180 ms

Video Conexión de GNS3 a Internet


Vídeo Online:
https://youtu.be/EFCiHjVNxns?hd=1