- #Use a controller on nfs 2 se generator
- #Use a controller on nfs 2 se full
- #Use a controller on nfs 2 se series
Processes run in domains, and are therefore separated from each other. Improved mitigation for privilege escalation attacks. SELinux policy is administratively-defined and enforced system-wide. Stepping beyond traditional UNIX permissions that are controlled at user discretion and based on Linux user and group IDs, SELinux access decisions are based on all available information, such as an SELinux user, role, type, and, optionally, a security level. Access is only allowed if an SELinux policy rule exists that specifically allows it.įine-grained access control. SELinux policy rules define how processes interact with files, as well as how processes interact with each other. There is a policy rule that permits Apache (the web server process running as httpd_t) to access files and directories with a context normally found in /var/With SELinux, even if Apache is compromised, and a malicious script gains access, it is still not able to access the /tmp directory.Īll processes and files are labeled. The type context for files and directories normally found in /var/The type context for web server ports is http_port_t. For example, the type name for the web server is httpd_t.
#Use a controller on nfs 2 se full
The SELinux type information is perhaps the most important when it comes to the SELinux policy, as the most common policy rule which defines the allowed interactions between processes and system resources uses SELinux types and not the full SELinux context. SELinux contexts have several fields: user, role, type, and security level. SELinux policy rules are not used if DAC rules deny access first, which means that no SELinux denial is logged if the traditional DAC rules prevent the access. Remember that SELinux policy rules are checked after DAC rules. By default, the policy does not allow any interaction unless a rule explicitly grants access.
#Use a controller on nfs 2 se series
The SELinux policy uses these contexts in a series of rules which define how processes can interact with each other and the various system resources. For example, a file can have multiple valid path names on a system that makes use of bind mounts. Not only does this provide a consistent way of referencing objects in the SELinux policy, but it also removes any ambiguity that can be found in other identification methods. A SELinux context, sometimes referred to as an SELinux label, is an identifier which abstracts away the system-level details and focuses on the security properties of the entity. Every process and system resource has a special security label called an SELinux context. Security Enhanced Linux (SELinux) implements Mandatory Access Control (MAC). The standard access policy based on the user, group, and other permissions, known as Discretionary Access Control (DAC), does not enable system administrators to create comprehensive and fine-grained security policies, such as restricting specific applications to only viewing log files, while allowing other applications to append new data to the log files. Transferring SELinux settings to another system with semanage Using the SELinux System Role to apply SELinux settings on multiple systems Deploying the same SELinux configuration on multiple systems Creating and using an SELinux policy for a custom container
#Use a controller on nfs 2 se generator
Introduction to the udica SELinux policy generator Creating and enforcing an SELinux policy for a custom application Custom SELinux policies and related tools Configuring Multi-Category Security for data confidentiality Using Multi-Category Security (MCS) for data confidentiality Troubleshooting problems related to SELinux Adjusting the policy for sharing NFS and CIFS volumes using SELinux booleans Customizing the SELinux policy for the Apache HTTP server in a non-standard configuration Configuring SELinux for applications and services with non-standard configurations Confining an administrator using sudo and the sysadm_r role Confining an administrator by mapping to sysadm_u Adding a new user as an SELinux-confined user Adding a new user automatically mapped to the SELinux unconfined_u user
Enabling SELinux on systems that previously had it disabled Permanent changes in SELinux states and modes Providing feedback on Red Hat documentation.