Dear all,
I will shortly be creating a public service on a private box that will
include shell access to untrusted users and would like your opinion on
the best way to go about this.
Obviously jails are a good start, but my main concern is whether to go
for one large jail for all the restricted users or one small jail per user.
I do not have a wealth of real IPs at my disposal but accountability
and security is paramount, therefore I would like to use local IPs
through NAT (within the one box) whilst retaining the translation logs.
I would like to use one local IP per user in order to keep track of
activity. I can afford a few real IPs for the purpose.
The accounts themselves will be supremely limited. No root access,
just basics such as ssh, perhaps telnet, mutt etc. I do not want the
users to have the ability to run any scripts, so perl etc is out, but I
suppose the NAT firewall will be a fallback if any compiled programs are
uploaded.
Each user account is likely to have email/gpg etc but I'm happy to
control that from the host system with virtual users and simply deliver
into the jail. It is not necessary for the jails to run any services,
except the ability to SSH in.
As you can see there are factors pulling in both directions, what would
you recommend as the best direction to go?
Sincerely,
Elliot Crosby-McCullough
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