<s>
W3Perl	B-Protocol
is	O
a	O
free	B-Application
software	I-Application
logfile	O
analyser	O
,	O
which	O
can	O
parse	O
Web/FTP/Mail/CUPS/DHCP/SSH	O
and	O
Squid	O
logfiles	O
.	O
</s>
<s>
Most	O
major	O
web	O
logfile	O
formats	O
are	O
supported	O
(	O
Web	O
:	O
CLF/ECLF/NECLF	O
on	O
Unix	O
,	O
IIS/W3C	O
on	O
Microsoft	O
;	O
Mail	O
:	O
Postfix/Sendmail/Exim	O
)	O
,	O
as	O
well	O
as	O
split/compressed	O
files	O
.	O
</s>
<s>
Essential	O
features	O
like	O
hosts	O
,	O
pages	O
,	O
scripts	O
,	O
countries	O
,	O
filetype	O
,	O
traffic	O
,	O
hourly	O
,	O
daily	O
,	O
weekly	O
,	O
monthly	O
,	O
referrer	B-Protocol
,	O
user	B-Protocol
agent	I-Protocol
,	O
and	O
error	O
are	O
available	O
along	O
with	O
other	O
specific	O
W3Perl	B-Protocol
stats	O
like	O
real-time	O
and	O
session	O
stats	O
.	O
</s>
<s>
W3Perl	B-Protocol
has	O
an	O
administration	O
interface	O
which	O
allows	O
building	O
configuration	O
files	O
from	O
a	O
web	O
interface	O
.	O
</s>
<s>
Written	O
in	O
Perl	B-Language
,	O
W3Perl	B-Protocol
can	O
be	O
installed	O
on	O
any	O
operating	B-General_Concept
system	I-General_Concept
that	O
supports	O
Perl	B-Language
.	O
</s>
<s>
W3Perl	B-Protocol
is	O
licensed	O
under	O
the	O
GNU	B-License
GPL	I-License
.	O
</s>
<s>
Blocking	O
referrer	B-Protocol
spam	O
have	O
been	O
added	O
but	O
as	O
it	O
is	O
based	O
on	O
a	O
blacklist	O
,	O
the	O
file	O
must	O
be	O
updated	O
regularly	O
.	O
</s>
<s>
AWStats	O
has	O
a	O
large	O
user	O
base	O
,	O
is	O
very	O
powerful	O
but	O
still	O
lacks	O
some	O
of	O
the	O
features	O
of	O
W3Perl	B-Protocol
.	O
</s>
