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  2. About error message 'We have found a virus on your attachment ...

    help.aol.com/articles/message-we-have-found-a...

    You may receive the message "We have found a virus on your attachment...Send your email again...ML0021" because the AOL email virus scan detected a virus on the file you’re attempting to send as an attachment. Once a file has been rejected by the AOL email service as containing a virus, it can’t be sent even if the virus is cleaned by a ...

  3. Port knocking - Wikipedia

    en.wikipedia.org/wiki/Port_knocking

    Port knocking is a flexible, customisable system add-in. If the administrator chooses to link a knock sequence to an activity such as running a shell script, other changes such as implementing additional firewall rules to open ports for specific IP addresses can easily be incorporated into the script. Simultaneous sessions are easily accommodated.

  4. Sophos - Wikipedia

    en.wikipedia.org/wiki/Sophos

    Sophos Ltd. is a British security software and hardware company. It develops and markets managed security services and cybersecurity software and hardware, such as managed detection and response, incident response and endpoint security software. [ 4][ 5] Sophos was listed on the London Stock Exchange until it was acquired by Thoma Bravo in ...

  5. Rootkit - Wikipedia

    en.wikipedia.org/wiki/Rootkit

    Rootkit. A rootkit is a collection of computer software, typically malicious, designed to enable access to a computer or an area of its software that is not otherwise allowed (for example, to an unauthorized user) and often masks its existence or the existence of other software. [1] The term rootkit is a compound of "root" (the traditional name ...

  6. McAfee: Disable or enable virus protection - AOL Help

    help.aol.com/articles/mcafee-disable-or-enable...

    If you disable virus protection, your computer will not be monitored for virus activity. If you must stop virus protection, ensure that you are not connected to the Internet. Note: Non-members or those on the Free AOL plan can subscribe to McAfee Internet Security Suite – Special Edition from AOL for a substantially discounted annual fee.

  7. Antivirus software - Wikipedia

    en.wikipedia.org/wiki/Antivirus_software

    Antivirus software (abbreviated to AV software ), also known as anti-malware, is a computer program used to prevent, detect, and remove malware . Antivirus software was originally developed to detect and remove computer viruses, hence the name. However, with the proliferation of other malware, antivirus software started to protect against other ...

  8. Why did I receive an email from MAILER-DAEMON? - AOL Help

    help.aol.com/articles/what-is-a-mailer-daemon...

    The most common reason for a failed delivery is that the email address entered isn't valid. If the delivery failure message says the account doesn't exist double check the spelling of the address you entered. A single misplaced letter could cause a delivery failure. If the message keeps getting bounced back, make sure the account is closed or ...

  9. Ransomware - Wikipedia

    en.wikipedia.org/wiki/Ransomware

    Ransomware is a type of cryptovirological malware that permanently blocks access to the victim's personal data unless a "ransom" is paid. While some simple ransomware may lock the system without damaging any files, more advanced malware uses a technique called cryptoviral extortion. It encrypts the victim's files, making them inaccessible, and ...