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I occasionally get the following Norton Notification:<br />
<br />
Vulnerability BLOCKED<br />
When: (date and time)<br />
From: (IP address of another computer on my network<br />
Attack Name: Portscan<br />
Application: /mach_kernel<br />
<br />
Is this anything serious, or is it just normal network activity?<br />
<br />
If it matters, the notification shows up on my MacBook. The IP address in the notification is a PC.<br />
<br />
Thanks in advance for your help.<br />
<br />

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I occasionally get the following Norton Notification:

Vulnerability BLOCKED
When: (date and time)
From: (IP address of another computer on my network
Attack Name: Portscan
Application: /mach_kernel

Is this anything serious, or is it just normal network activity?

If it matters, the notification shows up on my MacBook. The IP address in the notification is a PC.

Thanks in advance for your help.



Norton Notification: Vulnerability BLOCKED

Anti-virus software was originally developed to detect and remove computer viruses. However, with the proliferation of other kinds of malware, antivirus software started to provide protection from other computer threats. In particular, modern antivirus software can protect from malicious browser helper objects (BHOs), browser hijackers, ransomware, keyloggers, backdoors, rootkits, trojan horses, worms, malicious layered service providers (LSPs), dialers, fraud tools, adware and spyware. Some products also include protection from other computer threats, such as infected and malicious URLs, spam, scam and phishing attacks, online identity theft (privacy), online banking attacks, social engineering techniques, Advanced Persistent Threat (APT), botnets and DDoS attacks.

Anti-Virus Apps

Software firewalls, also known as host-based firewalls, provide a layer of software on one host that controls network traffic in and out of that single machine. Most operating systems now include firewall software, but many available software firewalls include central distribution, antivirus systems and disaster recovery.

Software Firewalls

Security is the protection of information systems from theft or damage to the hardware, the software, and the information on them, as well as from disruption or misdirection of the services they provide. The main goal of security is protecting assets, and an asset is anything of value and worthy of protection.  Information Security is a discipline of protecting information assets from threats through safeguards to achieve the objectives of confidentiality, integrity, and availability or CIA for short. On the other hand, disclosure, alteration, and disruption (DAD) compromise the security objectives.