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Networking ACLs [ edit ] On some types of proprietary computer hardware (in particular, routers and switches ), an access-control list provides rules that are applied to port numbers or IP addresses that are available on a host or other layer 3 , each with a list of hosts and/or networks permitted to use the service.
Standard ACLs: the simplest type of ACL filtering traffic solely based on source IP addresses. Standard ACLs are typically deployed to control access to network devices for network management or remote access. For example, one can configure a standard ACL in a router to specify which systems are allowed to Telnet to it.
Network access control (NAC) is an approach to computer security that attempts to unify endpoint security technology (such as antivirus, host intrusion prevention, and vulnerability assessment), user or system authentication and network security enforcement.
TCP Wrappers (also known as tcp_wrappers) is a host-based networking ACL system, used to filter network access to Internet Protocol servers on operating systems such as Linux or BSD. It allows host or subnetwork IP addresses , names and/or ident query replies, to be used as tokens on which to filter for access control purposes.
A network and wildcard mask combination of 1.1.1.1 0.0.0.0 would match an interface configured exactly with 1.1.1.1 only, and nothing else. Wildcard masks are used in situations where subnet masks may not apply. For example, when two affected hosts fall in different subnets, the use of a wildcard mask will group them together.
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Keeping patients’ injured knees at 90 degrees immobilizes torn ACLs in a way that “maximizes” healing, he said, similar to stabilizing broken and fractured bones inside a cast.
Access control lists (ACLs) are used in traditional discretionary access-control (DAC) systems to affect low-level data-objects. RBAC differs from ACL in assigning permissions to operations which change the direct-relations between several entities (see: ACLg below).