Password salvage on the Cisco Asa security Appliance

In this article, I'll explicate how to accomplish a password "reset" on your Cisco Asa safety appliance. The more ordinarily used term for this procedure is "password recovery" which is left over from the days when you could for real view passwords in configuration files in plain text. Today, such passwords are encrypted and not for real recoverable. Instead, you will gain entrance to the appliance via the console port and reset the password(s) to known values.

This procedure requires physical entrance to the device. You will power-cycle your appliance by unplugging it at the power strip and plugging it back in. You will then interrupt the boot process and turn the configuration register value to preclude the appliance from reading its stored configuration at boot. Since the expedient ignores its saved configuration on boot, you are able to entrance its configuration modes without passwords. Once you're in configuration mode, you will load the saved configuration from flash memory, turn the passwords to a known value, turn the configuration register value to tell the expedient to load its saved configuration on boot, and reload the device.

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Caution: As with all configuration procedures, these procedures should be tested in a laboratory environment prior to usage in a yield environment to ensure suitability for your situation.

The following steps were designed using a Cisco Asa 5505 safety Appliance. They are not suitable for a Cisco Pix Firewall appliance.

1. Power-cycle your safety appliance by removing and re-inserting the power plug at the power strip.

2. When prompted, press Esc to interrupt the boot process and enter Rom Monitor mode. You should immediately see a rommon prompt (rommon #0>).

3. At the rommon prompt, enter the confreg command to view the current configuration register setting: rommon #0>confreg

4. The current configuration register should be the default of 0x01 (it will for real display as 0x00000001). The safety appliance will ask if you want to make changes to the configuration register. Write back no when prompted.

5. You must turn the configuration register to 0x41, which tells the appliance to ignore its saved (startup) configuration upon boot: rommon #1>confreg 0x41

6. Reset the appliance with the boot command: rommon #2>boot

7. Notice that the safety appliance ignores its startup configuration while the boot process. When it finishes booting, you should see a generic User Mode prompt: ciscoasa>

8. Enter the enable command to enter Privileged Mode. When the appliance prompts you for a password, simply press (at this point, the password is blank): ciscoasa>enable Password: ciscoasa#

9. Copy the startup configuration file into the running configuration with the following command: ciscoasa#copy startup-config running-config Destination filename [running-config]?

10. The previously saved configuration is now the active configuration, but since the safety appliance is already in Privileged Mode, privileged entrance is not disabled. Next, in configuration mode, enter the following command to turn the Privileged Mode password to a known value (in this case, we'll use the password system): asa#conf t asa(config)#enable password system

11. While still in Configuration Mode, reset the configuration register to the default of 0x01 to force the safety appliance to read its startup configuration on boot: asa(config)#config-register 0x01

12. Use the following commands to view the configuration register setting: asa(config)#exit asa#show version

13. At bottom of the yield of the show version command, you should see the following statement: Configuration register is 0x41 (will be 0x1 at next reload)

14. Save the current configuration with the copy run start command to make the above changes persistent: asa#copy run start Source filename [running-config]

15. Reload the safety appliance: asa# reload law config has been modified. Save? [Y]es/[N]o:yes

Cryptochecksum: e87f1433 54896e6b 4e21d072 d71a9cbf

2149 bytes copied in 1.480 secs (2149 bytes/sec) head somewhere with reload? [confirm]

When your safety appliance reloads, you should be able to use your newly reset password to enter privileged mode.

Copyright (c) 2007 Don R. Crawley

Password salvage on the Cisco Asa security Appliance

Be careful Out There - Wireless Internet poses security risks huge!

The convenience of Internet access at a cafe in a car or house in the garden, along with more "hot spots" where Internet access is the popularity of wireless has significantly last year. But few realize the enormous security risks with wireless access.

We lock our businesses and homes, keep our money sometimes closed the banks and so on, but do not lock our wireless access points on your PC.Numerous studies business and residential customers wireless access points have been shown to not be locked or not locked properly.

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All you need is a wireless Internet router and network card for each machine. Instead of radio signals are long cables are used to connect computers so that they are the only high-speed connection sharing wireless networks are easy to install and relatively inexpensive .. But with the comfortis a trade-off security. wireless networks, sometimes referred to as Wi-Fi or 802.11 networks use a radio link instead of cables to connect computers. Therefore anyone can listen to radio or in the range theoretically transmit data over the network.

One study showed that 90 percent of the 1,500 companies surveyed have wireless security products, security systems, a large majority on the condition that they leave their networks. The data, which were broadcast on displayAttacks by hackers (Survey Group Circulation, August 16, 2006). Other studies have shown that companies use, wireless connections, dated, old technology to lock their wireless access points.

This is scary, because hackers can get to a network via wireless and can get Social Security numbers, driver's licenses, credit card numbers and other personal and financial information. Add to the mix, they can take over your computer,and the dangers grow. Intruders do not need physical access to hardware, can in your park or apartment complex sits on the opposite side of the road. Freely available tools allow intruders to "sniff" for insecure networks. With a program like this, a hacker can access a wireless access point, run the program, and within minutes, have someone using any password.

Technology and computers are constantly evolving and changing. Along with this, white-collarCriminals such as hackers are constantly adjusted and looking for new ways to succeed. Updates for viruses, spyware and operating systems are almost daily. The safety mechanism was first built in Wi-Fi Equivalent Privacy (WEP), which allows the encryption of wireless traffic, cable. However, encryption is disabled by default in wireless devices and software, and in many cases is never turned on. But even if WEP is used, it is far from certain.

Last Years broke Ian Goldberg, a cryptographer at security and data protection software developer Zero-Knowledge Systems Inc. of Montreal, in collaboration with researchers at the University of California, Berkeley, WEP. Researchers at Rice University in Houston and AT & T Labs in Florham Park, NJ, and later discovered an easier way to break WEP.

Go Wi-Fi outside of home and office is transmitting. Without security, anyone with a> Wireless-enabled laptop or notebook computer to the network. You can get free Internet access, steal information stored on your computer, or use the system to attack something else. This could include downloading child pornography, the sharing of copyrighted content, or performing a denial-of-service attack and could be easily linked together.

This vulnerability was in "wardriving" has led to driving with a wireless-enabled device and the search for wireless networks.There are those who see it as a hobby, they do so out of curiosity and to draw attention to the degree of vulnerability. Then there are those who use wardriving for fraud. The determination of the networks is not illegal, but access to it.

In February 2006, a man in Rockford, Illinois was arrested for accessing the Internet through a wireless non-profit agency. It 'was fined $ 250 sentenced to a year of court supervision. We are still afraid? We should be. Only lastYear after numerous technical papers on fire and fire risks for wireless security, nothing has changed. The solutions are available. Part of the answer is to allow your access point security features. It 'so simple. The companies also have to encrypt the traffic for the segment and the wireless network using VLANs (Virtual Local Area Networks). IT experts recommend that a wireless company evaluation by a person other than the fact that we havewho raised him. This will determine if the network is blocked. If not, can and should be done as soon as possible. IT companies such as Elite (http://www.eliteitpc.com) can provide these solutions for corporate and residential customers.

Be careful Out There - Wireless Internet poses security risks huge!

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