The Cisco ASA 5505 Firewall is the smallest model in the new 5500 Cisco series of hardware appliances. Although this model is suitable for small businesses, branch offices or even home use, its firewall security capabilities are the same as the biggest models (5510, 5520, 5540 etc). The Adaptive Security technology of the ASA firewalls offers solid and reliable firewall protection, advanced application aware security, denial of service attack protection and much more. Moreover, the performance of the ASA 5505 appliance supports 150Mbps firewall throughput and 4000 firewall connections per second, which is more than enough for small networks.
In this article I will explain the basic configuration steps needed to setup a Cisco 5505 ASA firewall for connecting a small network to the Internet. We assume that our ISP has assigned us a static public IP address (e.g 188.8.131.52 as an example) and that our internal network range is 192.168.1.0/24. We will use Port Address Translation (PAT) to translate our internal IP addresses to the public address of the outside interface. The difference of the 5505 model from the bigger ASA models is that it has an 8-port 10/100 switch which acts as Layer 2 only. That is, you can not configure the physical ports as Layer 3 ports, rather you have to create interface Vlans and assign the Layer 2 interfaces in each VLAN. By default, interface Ethernet0/0 is assigned to VLAN 2 and it’s the outside interface (the one which connects to the Internet), and the other 7 interfaces (Ethernet0/1 to 0/7) are assigned by default to VLAN 1 and are used for connecting to the internal network. Let’s see the basic configuration setup of the most important steps that you need to configure.
Step1: Configure the internal interface vlan
ASA5505(config)# interface Vlan 1
ASA5505(config-if)# nameif inside
ASA5505(config-if)# security-level 100
ASA5505(config-if)# ip address 192.168.1.1 255.255.255.0
ASA5505(config-if)# no shut
Step 2: Configure the external interface vlan (connected to Internet)
ASA5505(config)# interface Vlan 2
ASA5505(config-if)# nameif outside
ASA5505(config-if)# security-level 0
ASA5505(config-if)# ip address 184.108.40.206 255.255.255.0
ASA5505(config-if)# no shut
Step 3: Assign Ethernet 0/0 to Vlan 2
ASA5505(config)# interface Ethernet0/0
ASA5505(config-if)# switchport access vlan 2
ASA5505(config-if)# no shut
Step 4: Enable the rest interfaces with no shut
ASA5505(config)# interface Ethernet0/1
ASA5505(config-if)# no shut
Do the same for Ethernet0/1 to 0/7.
Step 5: Configure PAT on the outside interface
ASA5505(config)# global (outside) 1 interface
ASA5505(config)# nat (inside) 1 0.0.0.0 0.0.0.0
Step 6: Configure default route towards the ISP (assume default gateway is 220.127.116.11
ASA5505(config)# route outside 0.0.0.0 0.0.0.0 18.104.22.168 1
The above steps are the absolutely necessary steps you need to configure for making the appliance operational. Of course there are much more configuration details that you need to implement in order to enhance the security and functionality of your appliance, such as Access Control Lists, Static NAT, DHCP, DMZ zones, authentication etc.
Visit my website in my resource box below for more information about Cisco products and solutions. You can also learn how to configure any Cisco ASA 5500 Firewall Here.
Charging _ dis charging and circuit diagram
The basic theory of a 12v battery charger is a tutorial addressed to the people in need how a how to make 12v battery charger at home
we have to know the process in order to make it ,after knowing the basic theory and the working process of a lead acid 12v battery we can build assemble or make a 12 volt battery charger with protection. The 12v battery is still in demand these days altho the lithium battery technology is fighting back, but till 18650 battery will win we still have to use lead-acid battery because there are more affordable at this point.As well as starting the engine, an SLI battery supplies the extra power necessary when the vehicle’s electrical requirements exceed the supply from the charging system. It is also a stabilizer, evening out potentially damaging voltage spikes. While the engine is running, most of the power is provided by the alternator, which includes a voltage regulator to keep the output between 13.5 and 14.5 V. Modern SLI batteries are lead-acid type, using six series-connected cells to provide a nominal 12 volt system (in most passenger vehicles and light trucks), or twelve cells for a 24 volt system in heavy trucks or earth-moving equipment, for example.
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Repair All Mobile Chargers
I purchased mine from Meijers here’s a link:
Features Automatic shut-off when charge is complete.
Charges 2 or 4 AA or AAA NiMH rechargeable batteries in 8 hours.
Electronic components are physical entities within the system. Their sole purpose is to affect the associated fields or the electronic via a desired reliable method with the intended purpose of the electronic system. Some of the usual components are transistors, diodes, resistors, and capacitors.
Digital devices are types of electronic systems that use digital signals. Its representation of Boolean algebra is commonly used in mobile phones, computers and other costumer products. Digital devices and other digital circuits are usually made from large assemblies of logic gates.
Analog devices are electronic systems with a constant variable signal. The earliest device invented the was analog. The major difference between digital and analog electronics is its noise, precision and design difficulties.
The process information is programmable in analog electronics. They are more vulnerable to noise as compared to digital electronics. In digital, as the information is programmed and as the signals stay long inside the range value, digital devices represent identical information similar to analog devices.
Digital electronics are much smaller and easier to design as compared to similar analog electronic processes. This is one of the major reasons why the latter is more common and preferred. An analog device should be designed by hand. The procedure is less automatic as compared to digital.
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You can build an electronic circuit yourself also. It is quite easy. First buy some load. The simplest load can be used in a basic circuit. This would include an motor and lamp as well as a buzzer. Find some low-power components from several stores like RadioShack.
Buy a battery and power supply. For electronic circuits, the power supply should be as close as possible to the electrical energy of the components, without the need to leave over. You can purchase everything you need.
Connect one of the batter terminals to the button or switch. You can only do this by holding the uncoated end of one of the wires. Then, finish wiring of the circuit and place the batteries. Connect some load terminals to the free terminal of the holder of the battery.
In this lesson we’ll learn about different lead acid battery charging methods. We’ll discuss single stage constant current charging, trickle charging, multi-stage constant current charging, constant voltage charging, the modified constant voltage or fast charging method, float voltage, gassing voltage, charge efficiency, and the equalization process.
For more ** FREE ** online technical training check out the following playlists available at the bigbadtech channel:
Basic Electronics 1: DC Circuit Analysis https://www.youtube.com/playlist?list=PLdnqjKaksr8qQ9w3XY5zFXQ2H-zXQFMlI
Motor Control https://www.youtube.com/playlist?list=PLdnqjKaksr8qRPCFkU2Q8XQe0bfo99rs6
Motors and Generators https://www.youtube.com/playlist?list=PLdnqjKaksr8oba07pG-nE1Omy1_mabMtI
Motor Drives/Variable Frequency Drives (VFD) https://www.youtube.com/playlist?list=PLdnqjKaksr8qruLl85Uq3em62PjXlSNUF
Programmable Logic Controllers (PLCs) https://www.youtube.com/playlist?list=PLdnqjKaksr8qxlMYRVTF2YzTm6RwtA7pc