Soluții

How to protect agains an Evil Twin Attack

An Evil Twin attack is a type of wireless security threat where an attacker creates a fake wireless access point with the same name as a legitimate one, in order to trick users into connecting to it. Once a user connects to the fake access point, the attacker can intercept and eavesdrop on all of their internet traffic, steal sensitive information such as passwords and financial data, or even inject malware onto their device.

Here are some steps you can take to protect yourself against Evil Twin attacks:

  1. Verify the name of the wireless network: Before connecting to a wireless network, make sure that you are connecting to the correct one by verifying the name (SSID) of the network.
  2. Use encryption: Always use a secure encryption protocol such as WPA2 when connecting to a wireless network, to prevent unauthorized access to your data.
  3. Keep your device’s software updated: Regularly update your device’s software to ensure that it is protected against the latest security threats.
  4. Use a virtual private network (VPN): A VPN encrypts your internet traffic and helps protect you against eavesdropping and interception.
  5. Be cautious when connecting to public Wi-Fi: Be cautious when connecting to public Wi-Fi networks, as these are often the target of Evil Twin attacks. Avoid accessing sensitive information such as online banking or shopping sites on public Wi-Fi.
  6. Use a network security tool: Consider using a network security tool such as a personal firewall or antivirus software to protect your device and network against attacks.
  7. Stay informed: Stay informed about the latest security threats and best practices for protecting yourself against them.

It’s also important to be aware of the signs of an evil twin attack, such as a sudden loss of internet connection, slow internet speeds, or being redirected to a login page when you try to access a website. If you suspect that you have fallen victim to an evil twin attack, immediately disconnect from the network and take the necessary steps to secure your device, such as changing your passwords and running a security scan.

Additionally, organizations can take steps to prevent evil twin attacks by implementing strong network security measures, such as using encrypted connections, implementing access controls, and regularly monitoring network activity for unusual activity.

It is also recommended that organizations conduct regular security awareness training for employees to educate them about the dangers of evil twin attacks and how to stay safe while using public Wi-Fi networks.

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How to protect agains Password Spraying Attack

Password spraying: Password spraying is a type of cyber attack that involves using a single, commonly-used password to try to gain access to multiple accounts, rather than using a unique password for each account. The goal is to identify vulnerable accounts by trying a small number of passwords against a large number of usernames, rather than trying a large number of passwords against a single username. Password spraying is often used against organizations with weak password policies, or those that allow users to reuse passwords across multiple accounts.

Password spraying is a type of brute-force attack where the attacker targets multiple accounts with a small number of passwords, rather than using a different password for each account. The goal of password spraying is to identify which accounts are using weak passwords, so that the attacker can then focus their efforts on cracking those accounts using more traditional brute-force methods.

Password spraying is effective because many users still use weak, easily guessable passwords, such as “password123” or “admin”. The attacker starts by trying a few common passwords against a large number of accounts, hoping to find a small number of accounts that use one of those passwords. They can then use those accounts to escalate their privileges and gain access to sensitive data.

To protect against password spraying attacks, you can follow these steps:

  1. Use strong passwords: Use strong and unique passwords for each of your accounts, and make sure they are at least 12 characters long and include a mix of letters, numbers, and symbols.
  2. Enable two-factor authentication (2FA): Two-factor authentication provides an extra layer of security by requiring a second factor, such as a security token or a one-time code sent to your phone, in addition to your password.
  3. Regularly update your passwords: Regularly change your passwords and use a password manager to securely store your passwords.
  4. Monitor your accounts: Regularly monitor your accounts for any suspicious activity and report any unauthorized access immediately.
  5. Be cautious of phishing scams: Be cautious of phishing scams that try to trick you into giving up your password, and always verify the authenticity of emails and websites before entering your password.
  6. Use a security solution: Consider using a security solution such as a personal firewall or antivirus software to protect your devices and networks against attacks.
  7. Stay informed: Stay informed about the latest security threats and best practices for protecting yourself against them.
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How To: Check Ram Size From Redhat Linux Desktop System

You can use any one of the following command line tools to view the ram size under Red hat Enterprise Linux desktop or server based system:

  1. /proc/meminfo file –
  2. free command –
  3. top command –
  4. vmstat command –
  5. dmidecode command –
  6. Gnonome System Monitor gui tool –

Open a command-line terminal (select Applications > Accessories > Terminal), and then type the following commands:

$ cat /proc/meminfo

MemTotal:        8388608 kb
MemFree:         4033789 kB
Buffers:          133628 kB
Cached:          1735174 kB
SwapCached:            0 kB
Active:          1512812 kB
Inactive:        1024508 kB
Active(anon):    1170235 kB
Inactive(anon):    12566 kB
Active(file):     758121 kB
Inactive(file):  1136720 kB
Unevictable:        2388 kB
Mlocked:            2388 kB
HighTotal:       7400016 kB
HighFree:        4520172 kB
LowTotal:         789480 kB
LowFree:          511884 kB
SwapTotal:      15998968 kB
SwapFree:       15998968 kB
Dirty:               236 kB
Writeback:             0 kB
AnonPages:       1210488 kB
Mapped:           170524 kB
Shmem:             12424 kB
Slab:              65648 kB
SReclaimable:      46280 kB
SUnreclaim:        19368 kB
KernelStack:        3960 kB
PageTables:        10276 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:    20093716 kB
Committed_AS:    2906208 kB
VmallocTotal:     122880 kB
VmallocUsed:       72700 kB
VmallocChunk:      23036 kB
HardwareCorrupted:     0 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:       59384 kB
DirectMap2M:      851968 kB

The vmstat command can display memory statistics including additional information about processes, paging, block IO, traps, and cpu activity. Type the following command:
$ vmstat
$ vmstat -s

You can also use the dmidecode command for dumping a computer’s DMI (some say SMBIOS) table which can provide details about installed RAM and its speed:
# dmidecode --type memory
Sample outputs:

# dmidecode 2.10
SMBIOS 2.5 present.

Handle 0x0016, DMI type 16, 15 bytes
Physical Memory Array
	Location: System Board Or Motherboard
	Use: System Memory
	Error Correction Type: None
	Maximum Capacity: 64 GB
	Error Information Handle: Not Provided
	Number Of Devices: 8

Handle 0x0017, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x0016
	Error Information Handle: No Error
	Total Width: 72 bits
	Data Width: 64 bits
	Size: 2048 MB
	Form Factor: DIMM
	Set: 1
	Locator: DIMM1A
	Bank Locator: Bank1
	Type: DDR2
	Type Detail: Synchronous
	Speed: 667 MHz
	Manufacturer: 0000
	Serial Number: 00000000
	Asset Tag: Not Specified
	Part Number:                   

Handle 0x0018, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x0016
	Error Information Handle: No Error
	Total Width: Unknown
	Data Width: Unknown
	Size: No Module Installed
	Form Factor: DIMM
	Set: 1
	Locator: DIMM1B
	Bank Locator: Bank1
	Type: DDR2
	Type Detail: Synchronous
	Speed: 667 MHz
	Manufacturer:     
	Serial Number:         
	Asset Tag: Not Specified
	Part Number:                   

Handle 0x0019, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x0016
	Error Information Handle: No Error
	Total Width: 72 bits
	Data Width: 64 bits
	Size: 2048 MB
	Form Factor: DIMM
	Set: 1
	Locator: DIMM2A
	Bank Locator: Bank2
	Type: DDR2
	Type Detail: Synchronous
	Speed: 667 MHz
	Manufacturer: 0000
	Serial Number: 00000000
	Asset Tag: Not Specified
	Part Number:                   

Handle 0x001A, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x0016
	Error Information Handle: No Error
	Total Width: Unknown
	Data Width: Unknown
	Size: No Module Installed
	Form Factor: DIMM
	Set: 1
	Locator: DIMM2B
	Bank Locator: Bank2
	Type: DDR2
	Type Detail: Synchronous
	Speed: 667 MHz
	Manufacturer:     
	Serial Number:         
	Asset Tag: Not Specified
	Part Number:                   

Handle 0x001B, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x0016
	Error Information Handle: No Error
	Total Width: 72 bits
	Data Width: 64 bits
	Size: 2048 MB
	Form Factor: DIMM
	Set: 1
	Locator: DIMM3A
	Bank Locator: Bank3
	Type: DDR2
	Type Detail: Synchronous
	Speed: 667 MHz
	Manufacturer: 0000
	Serial Number: 00000000
	Asset Tag: Not Specified
	Part Number:                   

Handle 0x001C, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x0016
	Error Information Handle: No Error
	Total Width: Unknown
	Data Width: Unknown
	Size: No Module Installed
	Form Factor: DIMM
	Set: 1
	Locator: DIMM3B
	Bank Locator: Bank3
	Type: DDR2
	Type Detail: Synchronous
	Speed: 667 MHz
	Manufacturer:     
	Serial Number:         
	Asset Tag: Not Specified
	Part Number:                   

Handle 0x001D, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x0016
	Error Information Handle: No Error
	Total Width: 72 bits
	Data Width: 64 bits
	Size: 2048 MB
	Form Factor: DIMM
	Set: 1
	Locator: DIMM4A
	Bank Locator: Bank4
	Type: DDR2
	Type Detail: Synchronous
	Speed: 667 MHz
	Manufacturer: 0000
	Serial Number: 00000000
	Asset Tag: Not Specified
	Part Number:                   

Handle 0x001E, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x0016
	Error Information Handle: No Error
	Total Width: Unknown
	Data Width: Unknown
	Size: No Module Installed
	Form Factor: DIMM
	Set: 1
	Locator: DIMM4B
	Bank Locator: Bank4
	Type: DDR2
	Type Detail: Synchronous
	Speed: 667 MHz
	Manufacturer:     
	Serial Number:         
	Asset Tag: Not Specified
	Part Number:
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How to create New Simple Volume with Windows Disk Management

The Disk Management in Windows is used for creating and managing disk partitions. It allows deleting, formatting, and creating simple volumes. A simple volume is partly like a partition but still contains differences. It does not have the limitations on partition size and volume number. Windows Disk Management is equipped with a new simple volume wizard to help you create a simple volume on a disk.

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