If this interests someone in the VMS land to broaden his expertise to non VMS operating systems

[Ph Vouters]

http://vouters.dyndns.org/tima/Linux-SELinux-HP-UX-OpenVMS-ACLs-Securing_file_accesses.html

[Craig A Berry]

Regarding the claim "on OpenVMS, you are unable to place an ACL on a socket device."  Are you sure?  I'm not going to take the time to prove it, but this BG device sure looks like it could take an ACL:

$ show security/class=device bg21812:

_BG21812: object of class DEVICE
     Owner: [IDE$SERVER]
     Protection: (System: RWPL, Owner: RWPL, Group: RWPL, World: RWPL)
     Access Control List: <empty>

Also, please, please use real subject lines instead of the boilerplate "If this interests someone..."  Folks stand a better chance of knowing whether something will interest them if they know what "this" refers to.