<s>
Firestarter	B-Language
is	O
a	O
personal	B-Protocol
firewall	I-Protocol
tool	O
that	O
uses	O
the	O
Netfilter	B-Application
(	O
iptables/ipchains	O
)	O
system	O
built	O
into	O
the	O
Linux	B-Operating_System
kernel	I-Operating_System
.	O
</s>
<s>
Firestarter	B-Language
provides	O
a	O
graphical	O
interface	O
for	O
configuring	O
firewall	B-Application
rules	O
and	O
settings	O
.	O
</s>
<s>
Firestarter	B-Language
also	O
provides	O
facilities	O
for	O
port	B-Protocol
forwarding	I-Protocol
,	O
internet	O
connection	O
sharing	O
and	O
DHCP	B-Protocol
service	O
.	O
</s>
<s>
Firestarter	B-Language
is	O
free	B-License
and	I-License
open-source	I-License
software	I-License
and	O
uses	O
GUI	O
widgets	O
from	O
GTK+	B-Application
.	O
</s>
<s>
Note	O
that	O
it	O
uses	O
GTK2	B-Application
and	O
has	O
not	O
been	O
upgraded	O
to	O
use	O
GTK3	B-Application
so	O
the	O
last	O
Linux	B-Operating_System
distributions	O
it	O
will	O
run	O
on	O
are	O
Ubuntu	O
18	O
,	O
Debian	O
9	O
,	O
etc	O
.	O
</s>
