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Recomendações de segurança


herakty

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Como são recomendações a um nível base e geral achei que não deveria ser colocado na área de segurança mas na área geral, pois acho que será a área mais vista pelas pessoas com menos conhecimentos técnicos e que ainda não estão bem conscientes de certos pergios... penso eu, podendo estar errado, claro

e estou a colocar aqui porque estava a investigar sobre um novo vírus especializado em home banking (roubar dados bancários necessários a certas operações)... alerto aqui que há operações bancárias que se podem efectuar sem todos aqueles procedimentos de segurança das transferências on-line, como por exemplo criar créditos falsos em vosso nome e compras de bens, etc, etc

uma das coisas que mais valor têm no mercado negro do cracking são dados civis... dados normais mas reais sobre alguém, para falsificação de documentos da imigração ilegal apoiada pela mafia... algo que parece um grande nada pode criar o maior problema da vossa vida...

como não quero passar a ideia de fim do mundo mas sim alertar e fazer com que todos aumentem as preocupações sobre segurança coloco aqui algumas recomendações que achei muito interessantes no site da symantec

dizia que isto surgiu porque estou a investigar um novo virus, ou uma variação de um virus "infosteal" que não se têm alastrado muito porque é usado selectivamente, dai o meu interesse B) (gosto de coisas diferentes)

é um virus usado para "alvos"... isto envolve gandes cenas e até chega a envolver o assalto a casas de ricos para fisicamente instalar o virus... estamos a falar de grandes contas, mas qualquer um pode ser vitima

mas falarei das questões técnicas na area de segurança, aqui só queria fazer copy-paste de umas recomendações simples mas interessantes

e já sei que a maioria já sabe isto tudo... mas basta que uma pessoa fique com mais uma dica e já foi proveitoso  B) B)

Recommendations

Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

    * Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.

    * Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.

    * Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.

    * Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.

    * Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.

    * Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.

    * If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.

    * Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.

    * Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.

    * Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.

    * Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.

    * If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.

    * For further information on the terms used in this document, please refer to the Security Response glossary.

teckV

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