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Port knocking is totally dependent on the robustness of the port knocking daemon. The failure of the daemon will deny port access to all users and from a usability and security perspective, this is an undesirable single point of failure. Modern port knocking implementations mitigate this issue by providing a process-monitoring daemon that will ...
The Trusted Computer Security Evaluation Criteria (TCSEC) was a set of criteria, now deprecated, that had been established by the National Computer Security Center, an agency managed by the United States' National Security Agency. Lampson's definition of a covert channel was paraphrased in the TCSEC [3] specifically to refer to ways of ...
Against some port knocking designs, DoS attacks are a major problem, but against othes, they are impratical or would require massive resources to be effective. Again, see this for descriptions of port knocking designs. DoS attacks are a weakness of certain specific designs, not a systemic flaw in the port knocking concept.
In computer networking, a firewall pinhole is a port that is not protected by a firewall to allow a particular application to gain access to a service on a host in the network protected by the firewall. [1] [2] Leaving ports open in firewall configurations exposes the protected system to potentially malicious abuse.
802.1X-2001 defines two logical port entities for an authenticated port—the "controlled port" and the "uncontrolled port". The controlled port is manipulated by the 802.1X PAE (Port Access Entity) to allow (in the authorized state) or prevent (in the unauthorized state) network traffic ingress and egress to/from the controlled port.
In computer networking, TCP Stealth is a proposed modification of the Transmission Control Protocol (TCP) to hide open ports of some TCP services from the public, in order to impede port scans. It is somewhat similar to the port knocking technique. [1] [2] As of May 2015 it is an IETF Internet Draft specification. [3]
The Iranian hackers accused by the U.S. government Wednesday of carrying out hundreds of ransomware attacks against American targets were working for two Iranian companies the Department of ...
A man-on-the-side attack is a form of active attack in computer security similar to a man-in-the-middle attack.Instead of completely controlling a network node as in a man-in-the-middle attack, the attacker only has regular access to the communication channel, which allows him to read the traffic and insert new messages, but not to modify or delete messages sent by other participants.