<s>
NuFW	B-Protocol
is	O
a	O
software	O
package	O
that	O
extends	O
Netfilter	B-Application
,	O
the	O
Linux	O
kernel-internal	O
packet	B-Application
filtering	I-Application
firewall	B-Application
module	O
.	O
</s>
<s>
NuFW	B-Protocol
adds	O
authentication	O
to	O
filtering	O
rules	O
.	O
</s>
<s>
NuFW	B-Protocol
is	O
also	O
provided	O
as	O
a	O
hardware	O
firewall	B-Application
,	O
in	O
the	O
EdenWall	O
firewalling	O
appliance	O
.	O
</s>
<s>
NuFW	B-Protocol
has	O
been	O
restarted	O
by	O
the	O
FFI	O
and	O
renamed	O
into	O
UFWI	O
.	O
</s>
<s>
NuFW	B-Protocol
/	O
UFWI	O
is	O
an	O
extension	O
of	O
Netfilter	B-Application
which	O
brings	O
the	O
notion	O
of	O
user	O
to	O
IP	O
filtering	O
.	O
</s>
<s>
NuFW	B-Protocol
/	O
UFWI	O
can	O
:	O
</s>
<s>
Perform	O
accounting	O
,	O
routing	B-Protocol
and	O
Quality	O
of	O
service	O
(	O
QOS	O
)	O
based	O
on	O
users	O
and	O
not	O
simply	O
on	O
IPs	O
.	O
</s>
<s>
NuFW	B-Protocol
/	O
UFWI	O
refuses	O
the	O
idea	O
of	O
IP	O
==	O
user	O
as	O
an	O
IP	B-Protocol
address	I-Protocol
can	O
easily	O
be	O
spoofed	O
.	O
</s>
<s>
which	O
is	O
connected	O
to	O
clients	O
and	O
Nufw	B-Protocol
.	O
</s>
<s>
The	O
Nufw	B-Protocol
client	O
sees	O
that	O
a	O
connection	O
is	O
being	O
initiated	O
and	O
sends	O
a	O
user	O
request	O
packet	O
.	O
</s>
<s>
The	O
Nufw	B-Protocol
server	O
queues	O
the	O
packet	O
and	O
sends	O
an	O
auth	O
request	O
packet	O
to	O
the	O
Nuauth	O
server	O
.	O
</s>
<s>
The	O
Nufw	B-Protocol
server	O
transmits	O
the	O
packet	O
following	O
the	O
answer	O
given	O
to	O
its	O
request	O
.	O
</s>
<s>
NuFW	B-Protocol
is	O
the	O
only	O
real	O
Authentication	O
firewall	B-Application
,	O
as	O
it	O
never	O
associates	O
a	O
user	O
with	O
his	O
machine	O
.	O
</s>
