<s>
mod_proxy	O
is	O
an	O
optional	O
module	O
for	O
the	O
Apache	B-Application
HTTP	I-Application
Server	I-Application
.	O
</s>
<s>
This	O
module	O
implements	O
a	O
proxy	B-Application
,	O
gateway	B-Application
or	O
cache	B-Protocol
for	O
Apache	B-Application
.	O
</s>
<s>
It	O
implements	O
proxying	B-Application
capability	O
for	O
AJP13	B-Application
(	O
Apache	B-Application
JServ	I-Application
Protocol	I-Application
version	O
1.3	O
)	O
,	O
FTP	B-Protocol
,	O
CONNECT	O
(	O
for	O
SSL	B-Protocol
)	O
,	O
HTTP/0.9	B-Protocol
,	O
HTTP/1.0	B-Protocol
,	O
and	O
(	O
since	O
Apache	O
1.3.23	O
)	O
HTTP/1.1	B-Protocol
.	O
</s>
<s>
The	O
module	O
can	O
be	O
configured	O
to	O
connect	O
to	O
other	O
proxy	B-Application
modules	O
for	O
these	O
and	O
other	O
protocols	O
.	O
</s>
<s>
One	O
powerful	O
feature	O
of	O
Apache	B-Application
is	O
flexible	O
virtual	O
hosting	O
—	O
multiple	O
virtual	O
hosts	O
on	O
a	O
single	O
server	O
.	O
</s>
<s>
mod_proxy	O
can	O
help	O
to	O
improve	O
LAMP	B-Application
security	O
or	O
to	O
strip	O
SSL	B-Protocol
from	O
HTTP	B-Protocol
requests	I-Protocol
.	O
</s>
<s>
This	O
module	O
was	O
experimental	O
in	O
Apache	B-Application
1.1.x	O
.	O
</s>
<s>
As	O
of	O
Apache	B-Application
1.2	O
,	O
mod_proxy	O
stability	O
was	O
greatly	O
improved	O
.	O
</s>
<s>
Since	O
Apache	B-Application
2.0	O
,	O
proxy	B-Application
features	O
are	O
divided	O
into	O
several	O
modules	O
in	O
addition	O
to	O
mod_proxy	O
:	O
mod_proxy_http	O
,	O
mod_proxy_ftp	O
,	O
and	O
mod_proxy_connect	O
—	O
moreover	O
,	O
caching	O
is	O
provided	O
by	O
mod_cache	O
and	O
related	O
modules	O
.	O
</s>
<s>
Since	O
Apache	B-Application
2.2	I-Application
,	O
mod_proxy_ajp	O
and	O
mod_proxy_balancer	O
have	O
been	O
added	O
as	O
well	O
.	O
</s>
<s>
As	O
of	O
Apache	B-Application
2.4	I-Application
,	O
mod_proxy_fcgi	O
was	O
also	O
added	O
,	O
to	O
proxy	B-Application
FastCGI	O
requests	O
to	O
another	O
server	O
,	O
superseding	O
mod_fcgid	O
and	O
mod_fastcgi	O
.	O
</s>
