Ein Fehler bei der Herstellung von RJ45-Steckern an einem Ethernet-Kabel. Wo ist der Fehler?
, technologie , informatik , computer , internet , cyber sicherheit , hacker , hacking , netzwerk , ethernet , rj45 , tech , internet , hackers , hacking , pc , lan
Como resolver todos os exercícios PACKET TRACER do curso Cisco CYBERSECURITY Essentials
, cyber security , ciber segurança , cyber security awareness , hacker , hacking , hackers , packet tracer , cisco , curso cisco , cisco course , CISCO NETACAD
2393 trillion (2 393 000 000 000 000) tweets disappeared! Twitter X problems
, social network , tech , hacker , hackers , twitter , x , facebook , meta , instagram , youtube , twitter is down , x is down , facebook is down , instagram is down , youtube is down
The most common mistake when making RJ45 plugs on a ethernet cable. Where is the error?
, ethernet , rj45 , tech , computers , sysadmin , internet , cyber security , cyber , security , hacker , hackers , hacking , fiber optics , pc , network , lan , diy , ai
Comment passer de Windows 10 à Windows 11 ou 12 gratuitement – Mise à niveau de l'ordinateur
, ordinateur , technologie , internet , cyber sécurité , sécurité , hacker , hackers , pc , tech , windows , windows 11 , windows 12 , macbook , ai , malware
이더넷 케이블에 RJ45 플러그를 만들 때 가장 흔히 저지르는 실수입니다. 오류는 어디에 있습니까
기술 , 사이버보안 , 사이버 , 보안 , 해커 , 해킹 , 디지털 , ethernet , internet , rj45 , tech , sysadmin , helpdesk , hacker , hackers , hacking , pc , lan
Une erreur courante lors de la création de fiches RJ45 sur un câble Ethernet. Où est l'erreur ?
ethernet , câble , rj45 , technologie , tech , informatique , ordinateur , sysadmin , internet , cyber sécurité , hacker , hackers , piratage , numérique , pc
Un errore comune quando si realizzano connettori RJ45 su un cavo Ethernet. Dov‘è l‘errore?
ethernet , cavo , rj45 , tecnologia , tech , informatica , computer , sysadmin , internet , cyber , hacker , hackers , hacking , digitale , pc , network , lan
O erro mais frequente quando cravas fichas RJ45 de cabo de ethernet. Onde está o erro?
ethernet , cabo , rj45 , tecnologia , tech , informática , computador , sysadmin , internet , ciber segurança , segurança , hacker , hackers , hacking , pc , network , lan
Burla no TikTok – Cuidado com esta burla da velhinha a querer oferecer dinheiro
burla , ladrão , ladrões , crime , ciber crime , ciber segurança , tiktok , instagram , facebook , whatsapp , youtube , hacker , hackers , dinheiro , scammer , scam
Connectivity mistake on a T568B Ethernet cable, the wires are swapped
ethernet , ethernet cable , rj45 , t568b , technology , informatics , computers , sysadmin , helpdesk support , internet , cybersecurity , hacker , hacking , computer technician
Network cable with T568b standard - Can you see the problem?
ethernet , ethernet cable , rj45 , t568b , technology , informatics , computers , sysadmin , helpdesk support , internet , cybersecurity , hacker , hacking , computer technician , fiber optics
Problema com cabo de rede com standard T568b – Consegue ver o erro?
7 tipos de hackers informáticos: White hat, Grey hat, Black hat, Green hat, Blue hat, Red hat
O termo “hacker” costuma ser retratado de forma negativa pelos mídia, como sinónimo de ciber criminosos. Quando as pessoas ouvem a palavra “hacker”, imediatamente imaginam uma pessoa sombria com um computador numa sala escura.
How to use the “Nmap, the network mapper” tool to scan the system and map the network, to detect open ports on the system, identifying threats and vulnerabilities that may exist on the system and compromising data security and unauthorized access to system. The network and system administrator can use Nmap to monitor hosts and manage update schedules and service patches, problems with the version of the installed system, and detect services, packet filters, and firewalls that are running on the system. system. By identifying the various vulnerabilities that may exist in the system, the administrator can take precautions to interrupt or block possible threats to the system and improve the cyber security of the system, computer or server.
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Manage access on a Linux system https://youtu.be/b1vTw9gPnLs
Security audit of a Linux system https://youtu.be/PyG-_oO3YoE
Cracking user passwords on a system https://youtu.be/6GhkY-_oC-w
Steganography to hide files within files https://youtu.be/YrknHWxVRLw
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How to use steganography to hide and encrypt files within files. Using the Steghide tool to encrypt and hide a text file (odt, docx, word) inside an image or photo (jpg, jpeg, png). Thus hiding a password-protected file within other files, which only you know exists, to protect and prevent someone from being able to read the document even if they steal the image file. This process works with any type of file: document, photo, image, video, audio, applications, etc., so you can hide an encrypted file within any other file, maintaining a normal appearance and operation. To perform this process, the user needs to have both files on the computer, choose the file he wants to hide and a password / password for access, and the file he wants to serve as a container and which can be executed normally. Steghide will also allow you to reverse the process, to extract the hidden and encrypted file, to have access to the hidden data again.
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Manage access on a Linux system https://youtu.be/b1vTw9gPnLs
Security audit of a Linux system https://youtu.be/PyG-_oO3YoE
Cracking user passwords on a system https://youtu.be/6GhkY-_oC-w
Steganography to hide files within files https://youtu.be/YrknHWxVRLw
Check for open ports on a Linux system https://youtu.be/LU42fFdcFbQ
How to use the John the Ripper tool to crack or recover the passwords of users of a Linux system. The program will use a predefined dictionary to compare all password hashes for user accounts and thus discover users' secret passwords. This process can be fast, take hours, or days, it depends on the complexity of the passwords that need to be broken, that is why you should use a passphrase instead of a password with letters, numbers and symbols, to make this process difficult or impossible for cyber criminals. As you can see in the tutorial, I will use the passwd and shadow file from a Linux system, and in a matter of seconds I will discover the passwords of 5 users.
John the Ripper is an open source tool for auditing and recovering passwords for operating systems. The program supports hundreds of hash types and encryption, including for: passwords for users of Linux, BSD, Solaris, AIX, QNX, macOS, Windows systems, as well as for web applications such as WordPress, groupware, SQL databases, LDAP, and also capture WPA-PSK WiFi network traffic, SSH encrypted private keys, GnuPG, cryptocurrency wallets. The process can also be applied to ZIP, RAR, 7z, or PDF and Microsoft Office documents, and many others.
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Security audit of a Linux system https://youtu.be/PyG-_oO3YoE
Cracking user passwords on a system https://youtu.be/6GhkY-_oC-w
Steganography to hide files within files https://youtu.be/YrknHWxVRLw
Check for open ports on a Linux system https://youtu.be/LU42fFdcFbQ
How to do a complete security audit
of a Linux, macOS, BSD, Solaris or Unix system with the Lynis tool, to identify
vulnerabilities, security problems, wrong configurations or unprotected
services, and to be able to solve the problems to harden and protect the system
against cybercriminal attacks over the Internet
The Lynis program will make a
detailed scan of the system, and all of its security defenses to detect
problems or vulnerabilities that may exist and compromise access to the system
and data. The results of the scan will be displayed for various categories and
services running, indicating whether everything is fine, installed, poorly
configured, vulnerable, and suggestions you can make to solve the problem,
configure or activate the service.
It is very important that a network administrator and a system or server, perform a professional audit of the system, to improve the security of the system or server, and ensure that the system is not compromised or vulnerable to attacks, does not have services vulnerable to access unauthorized, and able to block cybercriminal attacks via the internet or the local area network (LAN), in order to prevent the system from failing or being the victim of theft of data and stored information.
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Security audit of a Linux system https://youtu.be/PyG-_oO3YoE
Cracking user passwords on a system https://youtu.be/6GhkY-_oC-w
Steganography to hide files within files https://youtu.be/YrknHWxVRLw
Check for open ports on a Linux system https://youtu.be/LU42fFdcFbQ
How to manage access for the users on a Linux system using commands on the terminal/console for system access control. How to create new users, with a password and personal information about each user. Verify that the user has been successfully created and has the respective directory created, and is added to the passswd and shadow file. Create groups and add users to a group so that they can have special group accesses to which the group has access. Administer and change the permissions of users, directories and files, through symbolic and absolute permissions, using the chmod command to add or remove permissions for users, groups and others.
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Manage access on a Linux system https://youtu.be/b1vTw9gPnLs
Security audit of a Linux system https://youtu.be/PyG-_oO3YoE
Cracking user passwords on a system https://youtu.be/6GhkY-_oC-w
Steganography to hide files within files https://youtu.be/YrknHWxVRLw
Check for open ports on a Linux system https://youtu.be/LU42fFdcFbQ
MSRC / Pela Equipe MSRC / 15 de março de 2021 / CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, CVE-2021-27065, mitigações parciais
A Microsoft lançou uma nova ferramenta de mitigação com um clique, a Ferramenta de Mitigação do Microsoft Exchange On-Premises para ajudar os clientes que não têm segurança dedicada ou equipes de TI a aplicar essas atualizações de segurança. Testamos essa ferramenta em implantações do Exchange Server 2013, 2016 e 2019. Esta nova ferramenta foi projetada como uma atenuação temporária para clientes que não estão familiarizados com o processo de patch / atualização ou que ainda não aplicaram a atualização de segurança do Exchange local.
Ao baixar e executar essa ferramenta, que inclui o Microsoft Safety Scanner mais recente, os clientes atenuarão automaticamente o CVE-2021-26855 em qualquer servidor Exchange no qual ele esteja implantado. Essa ferramenta não é uma substituição para a atualização de segurança do Exchange, mas é a maneira mais rápida e fácil de reduzir os riscos mais altos para Exchange Servers locais conectados à Internet antes de aplicar patches.
Recomenda-se que todos os clientes que ainda não aplicaram a atualização de segurança do Exchange local:
1. Baixe esta ferramenta https://aka.ms/eomt
2. Execute-o em seus servidores Exchange imediatamente.
3. Em seguida, siga as orientações mais detalhadas para garantir que seu Exchange local esteja protegido https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server/
4. Se você já estiver usando o Microsoft Safety Scanner, ele ainda está ativo e recomendamos mantê-lo em execução, pois pode ser usado para ajudar com atenuações adicionais https://docs.microsoft.com/en-us/windows/security/threat-protection/intelligence/safety-scanner-download
Uma vez executada, a ferramenta Run EOMT.ps1 executará três operações: Mitigar ataques conhecidos atuais usando CVE-2021-26855 usando uma configuração de reescrita de URL. Faça a varredura do Exchange Server usando o Microsoft Safety Scanner. Tente reverter quaisquer alterações feitas por ameaças identificadas.
fonte: https://msrc-blog.microsoft.com/2021/03/15/one-click-microsoft-exchange-on-premises-mitigation-tool-march-2021/
