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Most WLAN hardware has become quite easy to set up that many users simply plug it in and start using the network without giving much importance to safety. However, taking a couple of minutes to configure the security features of your wireless router or access point is time well spent. Here are some things you can do to protect your wireless network:

1) Secure your wireless router or access point administration interface
Almost all routers and access points have an administrator password is required to log into the device and modify the settings. Most devices use a weak password like “password” or the name of the manufacturer, and some do not have a default password at all. As soon as you configure a new WLAN router or access point, your first step should be to change the default password to something else. You may not use this password often, so be sure to list it in a safe place so you can refer to it if necessary. Without it, the only way to access the router or access point may be to restore the factory default setting to end all configuration changes we made.

2) Do not broadcast your SSID
Most WLAN access points and routers automatically (and continuously) broadcast name of the network, or SSID (Service Set Identifier). This makes the creation of wireless clients extremely convenient since you can locate a WLAN without having to know her name, but also make your WLAN visible to any wireless system within the scope thereof. Turning off SSID broadcast makes your network invisible to neighbors and passers-by (though it will remain detectable by WLAN “sniffers”).

3) Enable WPA encryption instead of WEP
S 802.11 WEP (Wired Equivalency Privacy) encryption has known weaknesses that make it relatively easy for a particular user with the proper equipment to break the encryption and access to the wireless network. A better way to protect your WLAN with WPA (Wi-Fi Protected Access). WPA provides much better protection and is also easier to use, as their characters in the password are not limited to 0-9 and AF, as they are with WEP. WPA support is built into Windows XP (with latest Service Pack) and virtually all modern wireless hardware and operating systems. A more recent version, WPA2, is found in newer hardware and provides a stronger encryption, but probably will need to download a patch for XP to use it.

4) Remember that WEP is better than nothing
If you find some of your wireless devices only support WEP encryption (this is often the case with non-PC devices like media players, PDAs, and DVRs), avoid the temptation to skip encryption entirely because despite their defects, using WEP is still far superior to that which has no encryption at all. If you use WEP, do not use an encryption key that is easy to guess, as a string of the same or consecutive numbers. In addition, although it can be a pain, WEP users should change encryption keys often – preferably every week.

5) Use MAC filtering for access control
Unlike IP addresses, MAC addresses are unique to specific network adapters, so by enabling MAC address filtering can limit network access to only your systems (or those who know). To use MAC filtering is necessary to find (and enter the router or AP) the 12-character MAC address of each system to be connected to the network, so it may be inconvenient to establish, especially if you have a lot of wireless clients or if clients change a lot. MAC addresses can “spoof” (imitated) by a knowledgeable person, so while not a guarantee of security, add another hurdle for potential intruders to jump.

6) Reduce your WLAN transmitter power
You will not find this feature on all wireless routers and access points, but some can reduce the power of your WLAN transmitter, thereby reducing the signal range. Although it is usually impossible to adjust a signal so precisely that does not leak outside your home or business, with some trial and error that often can limit the distance outside his premises the signal reaches, minimizing the possibility of outsiders to access the WLAN.

7) Disable remote administration

Most WLAN routers have the ability to be managed remotely via the Internet. Ideally, you should use this feature only if you can define a specific IP address or a limited range of addresses that can access the router. Otherwise, almost anyone anywhere could find and access your router. As a general rule, unless absolutely necessary this capacity, it is best to keep remote administration turned off. (Usually this is disabled by default, but it is always a good idea to check.) Most WLAN hardware has become quite easy to set up that many users simply plug it in and start using the network without giving much importance to security. However, taking a couple of minutes to configure the security features of your wireless router or access point is time well spent. Here are some things you can do to protect your wireless network:

1) Secure your wireless router or access point administration interface
Almost all routers and access points have an administrator password is required to log into the device and modify the settings. Most devices use a weak password like “password” or the name of the manufacturer, and some do not have a default password at all. As soon as you configure a new WLAN router or access point, your first step should be to change the default password to something else. You may not use this password often, so be sure to list it in a safe place so you can refer to it if necessary. Without it, the only way to access the router or access point may be to restore the factory default setting to end all configuration changes we made.

2) Do not broadcast your SSID
Most WLAN access points and routers automatically (and continuously) broadcast name of the network, or SSID (Service Set Identifier). This makes the creation of wireless clients extremely convenient since you can locate a WLAN without having to know her name, but also make your WLAN visible to any wireless system within the scope thereof. Turning off SSID broadcast makes your network invisible to neighbors and passers-by (though it will remain detectable by WLAN “sniffers”).

3) Enable WPA encryption instead of WEP
S 802.11 WEP (Wired Equivalency Privacy) encryption has known weaknesses that make it relatively easy for a particular user with the proper equipment to break the encryption and access to the wireless network. A better way to protect your WLAN with WPA (Wi-Fi Protected Access). WPA provides much better protection and is also easier to use, as their characters in the password are not limited to 0-9 and AF, as they are with WEP. WPA support is built into Windows XP (with latest Service Pack) and virtually all modern wireless hardware and operating systems. A more recent version, WPA2, is found in newer hardware and provides a stronger encryption, but probably will need to download a patch for XP to use it.

4) Remember that WEP is better than nothing
If you find some of your wireless devices only support WEP encryption (this is often the case with non-PC devices like media players, PDAs, and DVRs), avoid the temptation to skip encryption entirely because despite their defects, using WEP is still far superior to that which has no encryption at all. If you use WEP, do not use an encryption key that is easy to guess, as a string of the same or consecutive numbers. In addition, although it can be a pain, WEP users should change encryption keys often – preferably every week. See this page if you need support for WEP to work.

5) Use MAC filtering for access control
Unlike IP addresses, MAC addresses are unique to specific network adapters, so by enabling MAC address filtering can limit network access to only your systems (or those who know). To use MAC filtering is necessary to find (and enter the router or AP) the 12-character MAC address of each system to be connected to the network, so it may be inconvenient to establish, especially if you have a lot of wireless clients or if clients change a lot. MAC addresses can “spoof” (imitated) by a knowledgeable person, so while not a guarantee of security, add another hurdle for potential intruders to jump.

6) Reduce your WLAN transmitter power
You will not find this feature on all wireless routers and access points, but some can reduce the power of your WLAN transmitter, thereby reducing the signal range. Although it is usually impossible to adjust a signal so precisely that does not leak outside your home or business, with some trial and error that often can limit the distance outside his premises the signal reaches, minimizing the possibility of outsiders to access the WLAN.

7) Disable remote administration

Most WLAN routers have the ability to be managed remotely via the Internet. Ideally, you should use this feature only if you can define a specific IP address or a limited range of addresses that can access the router. Otherwise, almost anyone anywhere could find and access your router. As a general rule, unless absolutely necessary this capacity, it is best to keep remote administration turned off. (Usually this is disabled by default, but it is always a good idea to check.)

In this article I will explain the basic configuration steps required to configure a firewall Cisco ASA 5505 to connect a small network to the Internet. We assume that our ISP has assigned a static public IP address (eg 200.200.200.1 for example) and 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 for the external interface. The 5505 model differs from the larger models is that ASA has an 8-port 10/100, which acts as a layer 2 only. That is, you can not configure the physical ports and Layer 3 ports, and not have to create Vlan interface and assign the level 2 interfaces on each VLAN. By default, interface Ethernet0 / 0 is assigned to VLAN 2 and is the external interface (which connects to the Internet), and the other 7 interfaces (Ethernet0 / 1-0 / 7) is assigned by default to VLAN 1 and to connect to the internal network. Let’s see the basic configuration settings of the most important steps 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 200.200.200.1 255.255.255.0
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 200.200.200.2
———————————————————————————————————
ASA5505(config)# route outside 0.0.0.0 0.0.0.0 200.200.200.2 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.

Instructions
Click on “Start” in the lower left-hand portion of your desktop screen.

Select Control Panel and then Security Center to open the Windows Security Center.

Navigate to the bottom of the form and click the “Windows Firewall” link.

Select one of the two radio buttons as desired on the Windows Firewall form that opens. The “On” radio button is the recommended choice.

Click the “OK” button at the bottom of form.

Close the Windows Security Center window and close the Control Panel window.

The ports are concerned about those 3,389 port terminal services. If you do not have a firewall in place blocking the public Forwarding IP address to the private IP address using this port, then To call the security professional. Other ports in question are about 139 that provides access to network shares.

Another area of concern is the SMB or
(Server Message Block) protocol. This protocol is used among other things,
file sharing in Windows NT/2000/XP. In Windows NT is implemented on top of NetBT
(NetBIOS over TCP / IP), which uses the famous ports 137, 138 (UDP) and 139 (TCP).
In Windows 2000/XP/2003, Microsoft added the ability to run SMB directly
through TCP / IP, without the extra layer of NetBT. It uses TCP port 445.
Once again all these ports should remain in the private network and firewall
must block access.

Note: The NETSTAT command will show
what ports are open or in use, but is not a port scanning tool! If
wants his team scanned for open ports to see this page instead (link
shortly.)

C: netstat>-an | find / i “listening”

TCP 0.0.0.0:135 0.0.0.0:0 LISTENING

TCP 0.0.0.0:445 0.0.0.0:0 LISTENING

TCP 0.0.0.0:1723 0.0.0.0:0 LISTENING

TCP 0.0.0.0:3389 0.0.0.0:0 LISTENING

TCP 127.0.0.1:1026 0.0.0.0:0 LISTENING

TCP 127.0.0.1:4664 0.0.0.0:0 LISTENING

192.168.50.127:139 0.0.0.0:0 LISTENING TCP

192.168.100.193:139 0.0.0.0:0 LISTENING TCP

The netstat command also displays currently active on the computer. This
show what spyware or Trojan horses that may be installed on your machine.

Active Connections

Proto Local Address Foreign Address State

TCP argon: argon EPMAP: 0 LISTENING

TCP Argon: microsoft-ds Argon: 0 LISTENING

TCP argon: argon pptp: 0 LISTENING

TCP argon: argon 3389: 0 LISTENING

TCP argon: argon 1026: 0 LISTENING

argon TCP: 2617 localhost: 2618 ESTABLISHED

argon TCP: 2618 localhost: 2617 ESTABLISHED

Argon TCP: 2619 localhost: 2620 ESTABLISHED

argon TCP: 2620 localhost: 2619 ESTABLISHED

Argon TCP: 4664 Argon: 0 LISTENING

TCP argon: argon NetBIOS-SSN: 0 LISTENING

argon TCP: 2958-in-one f104.google.com: http ESTABLISHED

Argon TCP: 3011 is on f104.google.com: http TIME_WAIT

argon TCP: 3014 eo-in-f147.google.com: http ESTABLISHED

Argon TCP: 3081 unknown.xeex.net: http TIME_WAIT

argon TCP: 3104 unknown.xeex.net: http ESTABLISHED

Argon TCP: 3903 web1.allaboutsingles.com: http CLOSE_WAIT

argon TCP: 4449 static-71-116-207-166.lsanca.dsl-w.verizon.net: pptp ESTABLISHED

TCP Argon: 4762 runs f104.google.com: http CLOSE_WAIT

TCP argon: argon NetBIOS-SSN: 0 LISTENING

argon TCP: 2939 192.168.100.202:1025 ESTABLISHED

argon TCP: 2957 exchange01.intercore.local: 1419 ESTABLISHED

Once you have blocked all ports, then it must be
concerned about internal security. Nobody in your organization will be allowed
talk to anyone about any information safe. Even granting there email
direction. Then, use devices such as honey pots, Barracuda spam appliance Symantec
hardware and antivirus software. A properly configured network can allow your
workers to work and not allow hackers to work.

Emails are usually titled with subject lines that encourage a user to open e-mail. Some examples: “I love you” or “View naked famous person. “When the attachment is opened, the virus is activated and the user’s computer becomes infected. One of the best prevention is to not open attachments. Do not open attachments is inevitable for some. In this case the source attachments should be fully investigated and the attachment is to be expected by the receiver. Often, the attachments that end with the extension the.vbs (Visual Basic Script) or the extension exe (program files) are the most threat.

It seems that the motivation behind the virus has changed in recent years. In previous years, virus writers were more often to take advantage of the chaos and the rise of infamy. More recently, virus writers have appeared to work with spammers. The motivation is financial now, and the goal is to infect the computers, they distribute the method of infection and take control of thousands of automated machines to perform operations spam through open relays (Sturgeon, 2003). It seems that in recent years virus writers have been reported to be employed by spammers.

Network security has improved in recent years in response to the growing number of viruses. There is more awareness and investment in the use of anti-virus software and spam blocking software. With the increase of critical data and sophisticated hardware and software, organizations and individuals are spending more to prevent and detect viruses and worms that can be harmful for the day to day operations. Global revenues from anti-virus software reached nearly $ 10 billion in 2006 and has grown steadily.

In conclusion, viruses and worms are becoming more complex, because virus writers are trying to push the limits and improve what was already done. The number of email users is also increasing significantly. Therefore the volume of emails is increasing. The potential risk education E-mail is always there for younger users, e-mail viruses that many are also spread by people younger or less informed. The anti-virus software has been increasingly important to network security and is shown by the overall spending.

That is why a network security company good will to ensure that all individual security tools and other necessary features such as firewalls, are in place. Basically, the main reason for this is simply to protect hardware and data to the best of their ability. The way this is done, including methods and tools are all highly dependent on the network you have and what your business requirements are.

An unsecured network in which the internal management and external penetration testing and piracy have not been made are certainly a security risk for any company out there. That is why the main assets of a company should be protected as closely as possible.

One of the biggest risks of having an unsecured network is that when you log in http:// (including intranet) connection, the possibility of all sorts of vital information that is transferred from the computer. Similarly important information can be downloaded directly from the hard drives different, just because some other team has managed to evade security measures. This is one of the most risky to work in a team in an unsecured network.

If your company has a number of computers that are connected together by a faulty network and without warranty, not every business transaction is unique among them easily accessible to anyone concerned with what is at risk of piracy. Private information including credit card information and other data that you may have stored on your computer system also can provide information to thieves and unscrupulous hackers out there if given the chance. That is the reason why it is necessary to find a company that can provide exceptional security measures including firewalls very effective, so there is absolutely no question of any information that is transferred to computers outside the network .

If you are in an unsecured network, must be particularly careful in sharing personal information online and sending anything. Similarly, it is always a good strategy to make sure the connection is disconnected when not in use, especially when it is uncertain whether the network is secure or not. This goes a long way to keep your computer and network safe from unauthorized access from external parties.

This phrase is a shared secret key secret set of numbers, letters and / or symbols to create and is provided only for users who are authorized to access your wireless network. With a shared secret key or phrase, you are able to perform both security functions:

Authenticate – Users who take the phrase and install the network configuration panel can access the wireless network. Any user attempting to access the network without the correct passphrase is not granted access to the wireless network.

Encryption – The shared secret phrase is also the phrase used to encrypt all data before wireless transmission and enables information to be decoded at the receiving end. Any user who is able to receive the transmitted RF signal will only see gibberish on your computer because it holds the key to decrypt the streaming content.

The two main methods of providing encryption and authentication in wireless networks today are Wired Equivalent Privacy (WEP) and Wi-Fi Protected Access (WPA). There are other methods and even multiple versions of these methods, but these two methods are the most popular and common among wireless devices today.

The first method, WEP is the older of the two and is very vulnerable to piracy. Almost any novice hacker with a good antenna connected to a wireless adapter and a free software utility, available for download on various Web sites, you can break this form of security. There are certain defects of encryption that makes it easy for a hacker to break their shared passphrase (WEP key) and get unlimited access to the wireless network, Internet and your computer (s).

WPA is the modern solution is recommended to lock your Wi-Fi network for unauthorized access. As mentioned above, there are a number of versions and variations of WPA, but you want to use one of them, as they provide a higher level of security than WEP.

As you continue working through the wireless network configuration and design, safety should be a high priority when selecting the hardware. Make sure all your hardware supports WPA and that all have the same level of security. WEP is better (just) all, but always opt for WPA security on your hardware and network configuration

The bus (sometimes known as the backbone) topology is responsible for all computers, printer and server in a straight line. Each device connects and passes through a coaxial cable-Bus fromNetworkTopology essential facts insulated copper wire. Through this cable, data is transmitted from the source device to a cable connected to the target device is also connected to cable.

There are a few disadvantages to using bus topology. A disadvantage is that if the main cable malfunction, the entire network goes down resulting in the task difficult, time consuming to locate the source of the fault and repair the problem. A second drawback is the congestion of data during transmission known as “bottlenecks”.

Despite the disadvantages of implementing bus topology, there are advantages to configuring bus. Being relatively cheap and simplicity of adding new devices are the main reasons that a bus topology is the configuration of the topology used in the business environment.

Ring Topology

The ring topology organizes all computers, printers and a server in a typical circle. Each device connects to two other devices on the network, either a computer, printer or server. RingNetworkTopology-Ring configuration allows direct data transmission from a service on the ring to its neighboring devices.

There are some disadvantages to the implementation of a ring topology, including the fact that this type of configuration is quite expensive and usually quite difficult to install.

The advantage of using a ring topology is that if a device fails, a network administrator or specialized network hardware can proceed to re-route all data to other devices in the ring, bypassing the failed device, without interruption .

Star topology

The star topology organizes all computers, printers and server in a star configuration. Data transmission from one device to another is completed by using a specialized device knownNetworkTopology-Star as a hub. The aim of the center is the data path from a source device, through the hub, and the desired target device.

The main disadvantage of using the star topology is that if the malfunction of the heart, the whole network is down. While this may seem a major disadvantage, malfunction does not pose a big problem. Finding the source of the damage is done easier and faster than when using the bus or ring configurations. The center can also bottleneck during the transmission of data between devices.

There are advantages to using the configuration of stars that include ease of installation and star topology update process because of all the devices are connected directly to the hub. In the configuration of the star directly connected to the center allows for easy reconfiguration of the hub when installing new devices, therefore, the results are without any additional wiring.

If you think of your business home page as your other home, then you should consider the importance of protecting their safety in the same way as would protect the house we live together with the protection of their home, also completing protection of their guests or potential customers, which also protect such things as e-mail transmissions .. This is the kind of thing that makes your website stand out from the others, and builds a relationship with their customers that they can trust us to offer the best if the online transactions.

By obtaining certification SSL your site automatically gets as much respect and the competitive advantage over your competition needs, to show your customers that have invested in providing data security and encryption. With existence of too many here today and gone tomorrow business sites is probably in your best interest to get your site authenticated to prove that it intends to be in business for long.

The mere presence of an authentication of the graphics on your site can prove to your visitors they can trust you, and you can click on it and know the whole story about your business information. As this can build your confidence in doing business with you because they now have the confidence to trust your data with you on a secured transaction, and the icon will change to reflect this conviction.

Research shows that if you have one of these trusted brands for free on your site conversion rate of converting those who would otherwise just looking to buy customers will increase. This is because they feel confident that you are not a fly-by-night business online. Given the competitiveness of online businesses, this is an issue very important for you to consider to help users decide they can trust to spend their money with you.

Another thing to realize is that these graphs are known to reduce the number of Internet users who suddenly decide to leave your site to give them the confidence to at least sign up for your monthly newsletter. This extra visibility means that visitors are more likely to stay and find more items that are interested in buying either for requesting more information.

Internet These decals provide visitors with a quick click to verify your business information and the assurance that you paid for the authentication, which builds your confidence to become one of its paying customers.

The installation of these decals is easy, simply enter the code that has been given time to buy, and you will be a serious business owners who took the time to protect customer data by using one of SSL certificates.