<s>
pdnsd	B-Application
is	O
a	O
caching	B-Protocol
DNS	B-Protocol
proxy	B-Application
server	I-Application
created	O
originally	O
by	O
Thomas	O
Moestl	O
and	O
currently	O
maintained	O
by	O
Paul	O
Rombouts	O
.	O
</s>
<s>
pdnsd	B-Application
is	O
configurable	O
by	O
a	O
config	O
file	O
or	O
using	O
the	O
program	O
pdns-ctl	O
that	O
comes	O
with	O
the	O
package	O
.	O
</s>
<s>
Unlike	O
BIND	B-Protocol
,	O
pdnsd	B-Application
stores	O
cached	O
DNS	B-Protocol
records	O
on	O
disk	O
for	O
long	O
term	O
retention	O
and	O
will	O
not	O
purge	O
the	O
cache	O
upon	O
program	O
startup	O
or	O
shutdown	O
.	O
</s>
<s>
pdnsd	B-Application
is	O
designed	O
to	O
be	O
highly	O
adaptable	O
to	O
situations	O
where	O
net	O
connectivity	O
is	O
slow	O
,	O
unreliable	O
,	O
unavailable	O
,	O
or	O
highly	O
dynamic	O
,	O
as	O
is	O
the	O
case	O
with	O
Wi-Fi	B-Application
hotspots	I-Application
or	O
dialup	O
internet	O
.	O
</s>
<s>
This	O
program	O
also	O
has	O
limited	O
capability	O
of	O
acting	O
as	O
an	O
authoritative	O
nameserver	O
for	O
a	O
local	O
DNS	B-Protocol
zone	I-Protocol
within	O
a	O
private	B-Protocol
network	I-Protocol
.	O
</s>
<s>
The	O
program	O
is	O
released	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
.	O
</s>
