Author Archives: Allen Rodriguez
Security models are abstractions that make policy enforceable. They define what subjects may do to objects, which information flows are permitted, how integrity is protected, and where trust should be denied by default. The ISC2 CISSP body of knowledge uses classic models such as Bell-LaPadula, Biba, Clark-Wilson, and Brewer-Nash because each isolates a different security […]
Organizations rarely depend only on the vendors they contract with directly. A cloud provider depends on data-center, identity, networking, software, and support suppliers. A SaaS platform may use subprocessors for hosting, analytics, support, payment processing, or AI services. Those indirect dependencies are fourth parties from the customer’s perspective. ISACA CISM places that exposure inside information-security […]
Incident management readiness is the condition in which an organization can move from an alert to coordinated action without inventing the process during the crisis. ISACA CISM treats incident management as a management capability built on authority, communications, evidence, recovery priorities, and continuous improvement—not merely as a technical response task. A response plan can look […]
An incident can be technically contained and still become a business crisis if communication fails. Executives may make decisions from stale information, customers may hear conflicting messages, regulators may receive incomplete notices, employees may use compromised communication channels, and responders may lose time answering the same questions repeatedly. The ISACA CISM perspective places communication inside […]
A post-incident review should convert the experience of an incident into better decisions, controls, architecture, and operating behavior. In the ISACA CISM context, the review is not a retrospective storytelling exercise and it is not a search for someone to blame. It is a management mechanism for identifying why the organization produced the outcome it […]
A modern application is rarely built from source code written entirely inside one organization. It depends on package registries, open-source libraries, container images, build runners, compilers, CI/CD services, code-signing systems, artifact repositories, infrastructure modules, SaaS integrations, and the identities that connect those systems. ISC2 CISSP treats this trust chain as part of security architecture and […]
Data classification reduces risk only when a label changes how data is handled. A four-level scheme displayed in a policy document does not help unless people and systems can determine what a label means for access, storage, sharing, retention, monitoring, encryption, and disposal. In ISC2 CISSP, classification connects business value and sensitivity to concrete protection […]
Network and penetration testing sit on opposite sides of the same operational question: how a network is expected to behave, and what happens when someone deliberately searches for ways around those expectations. The strongest engineering practice understands both. Network teams build addressing, switching, routing, access, resilience, and observability; penetration testers challenge trust assumptions, authorization boundaries, […]
Packet filters help analysts reduce a large stream of frames into the evidence needed for one question. The first distinction is fundamental: a capture filter decides which packets are recorded in the first place, while a display filter decides which already-captured packets are shown. For CompTIA Network+ N10-009, knowing that difference prevents a common troubleshooting […]
NTLM relay is a credential-relay problem, not a password-cracking problem. An attacker who can influence where a Windows system authenticates may capture an NTLM authentication exchange and present it to another service that accepts the same form of authentication without sufficiently binding the exchange to the intended server or secure channel. The attacker does not […]
Fiber troubleshooting is less about recognizing connector names than about isolating where optical loss, contamination, polarity, or physical damage enters the link. CompTIA Network+ N10-009 expects that evidence-driven sequence: identify the fiber type and interface, understand the expected path, inspect and clean connectors, measure loss correctly, and avoid replacing components at random. Fiber behaves differently […]
Kerberos attack paths are easiest to understand by following trust relationships rather than memorizing attack names. In an Active Directory environment, Kerberos uses tickets so users and services can authenticate without sending a password to every resource. That design is strong when identities, service accounts, delegation, time, name resolution, and domain controllers are well managed, […]
DHCP snooping and Dynamic ARP Inspection protect different parts of the same local-network trust problem. DHCP snooping controls which switch ports are allowed to provide DHCP server messages and builds a binding table from observed address assignments. Dynamic ARP Inspection, or DAI, can use that binding information to validate ARP traffic before it is forwarded. […]
API authorization testing asks whether an identified caller can perform a particular action on a particular object, not simply whether a login succeeded. A network segment or gateway may authenticate a request while the application fails to verify that an invoice belongs to the caller’s tenant. CompTIA Network+ N10-009 provides the network segmentation and secure-service […]
Cryptographic systems fail in practice when organizations focus on algorithms but neglect the keys that make those algorithms trustworthy. A strong cipher cannot protect data if private keys are copied without control, symmetric keys are never rotated, recovery copies are exposed, or compromised keys remain valid. The ISC2 CISSP blueprint treats cryptography as part of […]
