Protocol Blocked

Protocol Blocked Details

If your computer displays a protocol blocked error message, several possibilities exist including the following three common ones:

  1. intentional port blocking by an employer or parent,
  2. intentional port blocking by a Web browser
  3. port blocking by a computer security program

For example, an employer or parent may be concerned about the types of websites you are visiting or considering visiting. Whether the employer doesn’t want employees going to job hunting sites like or a parent wants to ensure that children don’t visit inappropriate sites, software and Internet settings exist that will make the protocol blocked.

An employer may have the IT team block specific ports, URLs, and protocols while a parent may use parental control software to restrict access.

Web browsers also block ports and protocols that have known vulnerabilities. For example, after a cross-protocol attack in the early 2000s, Mozilla responded by changing how protocols access certain ports. Port blocking by browsers could generate protocol-blocked messages.

Another common cause of protocol blocked messages comes from computer security software that recognizes a specific URL or protocol as being potentially malicious. In most cases, if you encounter a message saying “protocol blocked,” there’s likely a good reason.

Associated Applications for Protocol Blocked

Firewalls, computer monitoring software, parental controls software, and Web browsers.

The solution to fix Blocked Protocol

PC Health AdvisorPCHA will scan all running processes to find applications that are running with and without your permission. Once the scan completes you are given easy instructions to kill running processes and programs that are no longer desired. PCHA will even identify malicious and hidden programs. Follow the recommendations made by the software or click the super-easy “FIX ALL” button and everything will be fixed according to PCHA recommendations.

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