<s>
MaraDNS	B-Protocol
is	O
an	O
open-source	O
(	O
BSD	O
licensed	O
)	O
Domain	B-Protocol
Name	I-Protocol
System	I-Protocol
(	O
DNS	B-Protocol
)	O
implementation	O
,	O
which	O
acts	O
as	O
either	O
a	O
caching	O
,	O
recursive	O
,	O
or	O
authoritative	O
nameserver	O
.	O
</s>
<s>
MaraDNS	B-Protocol
has	O
a	O
string	O
library	O
,	O
which	O
is	O
buffer	O
overflow	O
resistant	O
and	O
has	O
its	O
own	O
random	O
number	O
generator	O
.	O
</s>
<s>
While	O
MaraDNS	B-Protocol
does	O
not	O
directly	O
support	O
BIND	O
zone	O
files	O
,	O
its	O
zone	O
file	O
format	O
is	O
similar	O
and	O
a	O
converter	O
to	O
convert	O
from	O
BIND	O
's	O
zone	O
file	O
format	O
is	O
included	O
.	O
</s>
<s>
MaraDNS	B-Protocol
runs	O
as	O
an	O
unprivileged	O
user	O
inside	O
of	O
a	O
chroot	O
environment	O
,	O
while	O
MaraDNS	B-Protocol
specifies	O
the	O
user	O
and	O
group	O
to	O
run	O
as	O
by	O
user-ID	O
,	O
Simon	O
Burnet	O
has	O
made	O
a	O
patch	O
that	O
makes	O
it	O
possible	O
to	O
supply	O
a	O
username	O
MaraDNS	B-Protocol
can	O
add	O
both	O
IP	O
records	O
and	O
the	O
corresponding	O
PTR	O
"	O
reverse	O
DNS	B-Protocol
lookup	O
"	O
record	O
.	O
</s>
<s>
It	O
can	O
be	O
used	O
as	O
a	O
master	O
DNS	B-Protocol
server	O
,	O
and	O
,	O
with	O
some	O
caveats	O
,	O
as	O
a	O
slave	O
DNS	B-Protocol
server	O
.	O
</s>
<s>
MaraDNS	B-Protocol
currently	O
does	O
not	O
support	O
DNSSEC	B-Protocol
because	O
of	O
a	O
lack	O
of	O
money	O
for	O
the	O
developer	O
to	O
implement	O
it	O
using	O
the	O
LibTom	O
library	O
.	O
</s>
<s>
Deadwood	O
includes	O
built-in	O
"	O
DNS	B-Protocol
wall	O
"	O
filtering	O
(	O
to	O
protect	O
against	O
external	O
domains	O
which	O
resolve	O
to	O
local	O
IPs	O
)	O
,	O
the	O
ability	O
to	O
read	O
and	O
write	O
the	O
cache	O
to	O
a	O
file	O
,	O
DNS-over-TCP	O
support	O
,	O
the	O
ability	O
to	O
optionally	O
reject	O
MX	O
,	O
IPv6	O
AAAA	O
,	O
and	O
PTR	O
queries	O
,	O
code	O
that	O
stops	O
AR-spoofing	O
attacks	O
,	O
among	O
other	O
features	O
.	O
</s>
<s>
MaraDNS	B-Protocol
releases	O
are	O
distributed	O
with	O
a	O
BSD-type	B-Operating_System
license	I-Operating_System
.	O
</s>
