How to configure Access to Cisco ASA 5505

Access to Cisco ASA 5505

The Cisco ASA 5505 Firewall is one of the smallest model of the new Cisco 5500 series of hardware devices. Although this model is suitable for small businesses, branch offices, or even home use, its firewall security capabilities are the same as the larger models (5510, 5520, 5540, etc.). Adaptive Security technology in ASA firewalls provides robust and reliable firewall protection, advanced application-aware security, denial-of-service attack protection and much more. In addition to the performance of the ASA 5505 appliance it supports a firewall performance of 150 Mbps and 4000 firewall connections per second which is more than sufficient for small networks. Next, we will see the basic configuration of the Cisco ASA 5505 to connect to the configuration panel.

This article is intended for those who have difficulties accessing the Cisco ASA through the browser or software to the configuration panel.

We will try to access the configuration panel of our Cisco ASA 5505 Firewall with the IPv4 address assigned by default (https://192.168.1.1) through our browser, once connected to the internet through port (0) of our Cisco Firewall ASA 5505.

If the basic configuration of our Cisco ASA 5505 Firewall is correct, our browser will block access due to the invalidity of the certificate, we simply accept the risks to continue.

Aceptar el certificado de acceso de ASA Cisco 5505

Once we accept the certificate we will find the following window with the following options (Install ASDM Launcher and Install Java web start) choose the one of your preference. You have to be present that there is no username and password in the default configuration of Cisco 5505.

Acceso de ASA Cisco 5505

Access to Cisco ASA 5505 Through Console

In this case, to access the configuration of our Cisco firewall, we will need the RJ45 console cable that is generally included in our firewall.

Cable De Consola Cisco Original Rj45

Once our RJ45 console cable is connected, we go to the Windows device manager and display (Port COM & LPT) Communication Port (CM1).

administrador de dispositivos de windows

With the port located we can now connect with our firewall through PuTTY.

PUTTY Acceso a cisco

At this point we will only have to associate our Ethernet0 / 0 port with Vlan 1 to gain access to the configuration panel of our Cisco ASA 5505, so we simply execute the following commands.

At this point we will only have to associate our Ethernet0 / 0 port with Vlan 1 to gain access to the configuration panel of our Cisco ASA 5505, When we connect for the first time to Cisco 5505 we do not need a password so we simply press Entel and we will take the privileges needed to run the following commands.

We create the configuration of our Vlan 1

Cisco-5505> en
Password:
Cisco-5505#

First we are going to check the configuration of our Cisco 5505 with the command (sh inti p b). We can see that Vlan1 by default has the IP address 192.168.1.1 assigned, but it is disabled.

Cisco-5505# sh int ip b
Interface                  IP-Address      OK? Method Status                Protocol
Ethernet0/0                unassigned      YES unset  up                       up
Ethernet0/1                unassigned      YES unset  down                  down
Ethernet0/2                unassigned      YES unset  down                  down
Ethernet0/3                unassigned      YES unset  down                  down
Ethernet0/4                unassigned      YES unset  down                  down
Ethernet0/5                unassigned      YES unset  down                  down
Ethernet0/6                unassigned      YES unset  down                  down
Ethernet0/7                unassigned      YES unset  down                  down
Internal-Data0/0        unassigned      YES unset  up                       up
Internal-Data0/1        unassigned      YES unset  up                       up
Vlan1                        192.168.1.1     YES unset  down               down
Vlan2                         unassigned      YES manual down                 down
Virtual0                      127.1.0.1         YES unset  up                      up

To enable Vlan 1 it is necessary to associate our Ethernet Port 0/0 with Vlan 1 with the command (switchport access). First we access the Ethernet0/0 interface with the command (int)

Cisco-5505# conf t
Cisco-5505(config)# int Ethernet0/0
Cisco-5505(config-if)# switchport access vlan 1
Cisco-5505(config-if)# no shutdown

If we check our vlan 1 again we will see that it is already active and we can access it from our browser.

Cisco-5505# sh int ip b
Interface                  IP-Address      OK? Method Status                Protocol
Ethernet0/0                unassigned      YES unset  up                       up
Ethernet0/1                unassigned      YES unset  down                  down
Ethernet0/2                unassigned      YES unset  down                  down
Ethernet0/3                unassigned      YES unset  down                  down
Ethernet0/4                unassigned      YES unset  down                  down
Ethernet0/5                unassigned      YES unset  down                  down
Ethernet0/6                unassigned      YES unset  down                  down
Ethernet0/7                unassigned      YES unset  down                  down
Internal-Data0/0        unassigned      YES unset  up                       up
Internal-Data0/1        unassigned      YES unset  up                       up
Vlan1                        192.168.1.1    YES unset  up                    up
Vlan2                         unassigned      YES manual down               down
Virtual0                      127.1.0.1         YES unset  up                    up

If you have any questions, do not hesitate to contact the Picaraza Domains support team 24/7/365.

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