services/Shell.md
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## Entropy shellbox
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The Entropy shellbox runs a [Grsecurity](https://grsecurity.net/) secured kernel, along with various other hardening features such as [RBAC](https://en.wikipedia.org/wiki/Role-based_access_control) and some sysctl tweaks. It has an internal mail system which anyone can use to contact a shell user (`[user]@entropy.aix.ovh`). Mail is also accepted to shell users from external mail servers. Additionally, it has all of the [BlackArch tools](http://www.blackarch.org/tools.html) installed and available for everyone to use.
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-To further enhance security, the ownership of various SUID executables and logs has been restricted to members of certain groups, which are nicely explained by the [MOTD](https://entropy.aix.ovh/shell/motd).
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+To further enhance security, the ownership of various SUID executables and logs has been restricted to members of certain groups, which are nicely explained by the [MOTD](https://entropy.aix.dn42/shell/motd) ([altlink](https://entropy.aix.ovh/shell/motd)).
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By default, users will be part of only `tpe` and `audit` groups (as well as their own) but may request to be added to other groups. Please note that only `execve()` and `chdir()` calls are logged as a result of a user's membership of the `audit` group.
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