services/Shell.md
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| mortzu | shell.mortzu.dn42 | dn42 only | - | - |
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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 and some sysctl tweaks. It has an internal mail system which anyone can use to contact a shell user (<user>@entropy.aix.[ovh|dn42]). 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:
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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|dn42]). 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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```
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tpe: allows you to execute files not in root-owned
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directories writeable only by root