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  <H1 align="center">The c-icap project</H1> 
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									<li> <a href="about.html" target="_self">About c-icap</a></li>
									<li> <a href="install.html" target="_self">Installation</a></li>
									<li> <a href="configure.html" target="_self">Configuration guide</a></li>
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<H2>INSTALL</H2>

<P>Go to the
sources directory and run: 
</P>

<pre> 
  ./configure --prefix=/usr/local/c-icap
</pre>

<P>If you
don't have ClamAV installed, run: 
</P>

<pre>
     ./configure --prefix=/usr/local/c-icap --without-clamav
</pre>

<P>In this case, only the echo service will be created.
</P>

<p>
For more configure options run:
</p>
<pre>
./configure --help
</pre>

<P>After the configuration process, you can compile and install the software as
follows: 
</P>

<pre> 
    make
    make install
</pre>

<P>Then, edit to the file <i>/usr/local/c-icap/etc/c-icap.conf</i>. It contains a
set of default values that configure the c-icap server. Finally, you
can run the c-icap server: 
</P>

<pre>
    /usr/local/c-icap/bin/c-icap
</pre>

<P>
If you want to display debugging information on the terminal, the previous
command should be executed with following arguments: 
</P>

<pre>
    /usr/local/c-icap/bin/c-icap -N -D -d 10
</pre>   
 
<P>
The first
argument <I>-N</I> prevents the c-icap server from forking in the
background, the second argument <I>-D</I> enables the printing of
messages to standard output, and the third argument <I>-d 10</I>
enables the printing of full debugging information. 
</P>

FreeBSD users can also download the c-icap from 
<A href="http://www.freshports.org/www/c-icap/">FreshPorts</A> site.

<H3>Testing your instalation</H3>

To test your c-icap server you can use the icap-client utility which 
included in c-icap package.
From the same host simply run icap-client without any arguments.
This will do an options request to the icap server in localhost. 
You must see something like that:

<pre>
tsantila@barbarian:~>  /usr/local/c-icap/bin/icap-client
ICAP server:localhost, ip:127.0.0.1, port:1344

OPTIONS:
        Allow 204: Yes
        Preview: 1024
        Keep alive: Yes

ICAP HEADERS:
        ICAP/1.0 200 OK
        Methods: RESPMOD, REQMOD
        Service: C-ICAP/030606 server - Echo demo service
        ISTag: "5BDEEEA9-12E4-2"
        Max-Connections: 20
        Options-TTL: 3600
        Date: Sun, 04 Jun 2006 16:18:55 GMT
        Preview: 1024
        Allow: 204
        Transfer-Preview: *
        Encapsulated: null-body=0
</pre>

To check the "/bin/ls" file with clamav antivirus using the icap server run:
<pre>
tsantila@barbarian:~> /usr/local/c-icap/bin/icap-client -f /bin/ls  \
            -s "srv_clamav?allow204=on&force=on&sizelimit=off&mode=simple"
ICAP server:localhost, ip:127.0.0.1, port:1344

No modification needed (Allow 204 responce)
</pre>
The Allow204 responce means that no virus found in this file.<br>
In this example we called the srv_clamav service with arguments:
<br><I>allow204=on</I> to allow 204 responces outside previews. If you omit this argument then
   the srv_clamav service will send back unmodified the file we sent.
<br><I>force=on</I> to scan the file even if its file type does not included in srv_clamav.ScanFileTypes directive
in c-icap.conf file.
<br><I>sizelimit=off</I> to ignore srv_clamav.MaxObjectSize directive in c-icap.conf file
<br><I>mode=simple</I> to only repsonce with allow204 whan no virus found and an error message if  virous found.

<p>
Send a virus file to examine srv_clamav's behaviour when a virus found:
<pre>
tsantila@barbarian:~> /usr/local/c-icap/bin/icap-client -f /usr/local/src/clamav-0.83/test/clam.exe \
   -s "srv_clamav?allow204=on&force=on&sizelimit=off&mode=simple"
ICAP server:localhost, ip:127.0.0.1, port:1344

VIRUS FOUND

You try to upload/download a file that contain the virus
ClamAV-Test-File
This message generated by C-ICAP srvClamAV/antivirus module
</pre>

<H3>Installing SQUID</H3>

<P>
Download the Squid 3.0 proxy server from 
<A href="http://www.squid-cache.org/Versions/v3/3.0/">squid site</A>.
</P>

<P>To enable ICAP support in Squid, you must configure it using
<I>--enable-icap-client</I>. Below, is the command I used
in my workstation running Linux SUSE 9.1: 
</P>

<pre>
    ./configure --with-pthreads --enable-basic-auth-helpers=getpwnam,LDAP,PAM\
                --enable-snmp --enable-ssl\
                --enable-linux-netfilter --enable-icap-client\
                --enable-external-acl-helpers=ip_user,ldap_group,unix_group\
                --enable-digest-auth-helpers=password

</pre>
<P>
In the configuration file of Squid enter the following lines: 
</P>
<pre>
	icap_enable          on
	icap_preview_enable  on
	icap_preview_size    128
	icap_send_client_ip  on
	icap_send_auth_user  on
	
	icap_auth_scheme     Local://%u

icap_service         service_avi_req reqmod_precache 0 icap://localhost:1344/srv_clamav
	icap_service         service_avi respmod_precache 1 icap://localhost:1344/srv_clamav
	
        icap_class           class_antivirus service_avi service_avi_req
	icap_access          class_antivirus allow all
	
</pre>
	
<P>If c-icap does not reside in the same machine as Squid, change the line
icap://localhost:1344/srv_clamav to
icap://<I>cicap_hostname</I>:1344/srv_clamav, where <I>cicap_hostname</I>
is the hostname or the IP address of the c-icap server. For more
information, read the Squid's manual. 
</P>

<p>
You can use <i>icap_access</i> directive to define sites which must passed or no
 to the icap server.

<!--
<H3>c-icap for Win32</H3>

<p>
The Win32 implementations is in early development state so you should only use it for 
experimentation purposes. 
</p>

<p>
For Cygwin environment the installation procedure of c-icap
is similar with that for UNIX systems.
</p>
<p>
   If you ident to use the Win32 native implementation of c-icap you need the Microsoft C/C++ compiler and 
   the nmake utility. Just run:
 <pre>
          nmake -f makefile.w32  nodebug=1
 </pre>
 Then copy the files <i>c_icap.dll, c-icap.exe and  srv_echo.dll</i>  to a directory  and build  the  <i>c-icap.conf</i> file
 Then  run
 <pre>
     c-icap.exe  -f c-icap.conf  -D -d 10
 </pre>
 Only the echo service works in the Win32 native implementation.
</p>
-->

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			           &copy; Tsantilas Christos,  email: chtsanti at users dot sourceforge dot net
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