Delete the whole acl The setfacl command's -b option removes the acl from the specified file. /test$ setfacl -b file33 paul@laika paul@laika: /test$ getfacl file33 # owner: paul # group: paul user::rw- group::r— other::r— acl mask The acl mask specifies the maximum permissible values for each element in the acl. This mask is computed each time the setfacl or chmod commands are executed. The —no-mask option disables the computation. /test$ setfacl —no-mask -m paul@laika file33 u:sandra:7 paul@laika:/test$ getfacl file33 # owner: paul # group: paul user::rw- user:sandra:rwx # rw- group: rw- mask: rw- other: rw-
On some kinds of proprietary computer hardware (most notably routers and switches), an access-control list contains rules that apply to port numbers or IP addresses accessible on a host or other layer 3 device, each with a list of approved hosts and/or networks. While it is feasible to construct access-control lists based on network domain names, this is a dubious practice since TCP, UDP, and ICMP headers do not carry domain names. As a result, the device enforcing the access-control list must translate names to numeric addresses independently. This creates an extra attack surface for an attacker attempting to penetrate the access-control list-protected system's security. ACLs may be configured on both individual servers and routers. Access-control lists may be designed to control both incoming and outgoing traffic, and hence function similarly to firewalls in this context. ACLs, like firewalls, may be governed by security legislation and standards such as the PCI DSS. Implementations of SQL [adjust]
ACL sample
The following example ACL defines the resource owner and a set of permits for a bucket. The format is the Amazon S3 REST API's XML representation of an ACL. The owner of the bucket has FULL CONTROL over the resource. Additionally, the ACL demonstrates how rights on a resource are provided to two AWS accounts identified by their canonical user IDs and two of the preset Amazon S3 groups covered in the prior section.
Windows ACLs use a distinct paradigm for defining permissions for the file owner and owning group. Windows 2000 introduced the idea of an owning group. This results in inconsistent outcomes when file ownership changes. In POSIX ACLs, both the access ACL and the default ACL include entries for the owner and owning group. When access to an object is checked, these items are connected with the object's current owner and owning group. Windows ACLs offer two pseudo groups named Creator Owner and Creator Group that function similarly to inheritable rights, but do not permit these pseudo groups for access-defining entries. When an object inherits rights, the abstract entries are translated to particular user and group entries.
