Squid + SquidClamav2015/06/01

	Install SquidClamav and Configure Proxy Server to scan downloaded files to protect from virus.
[1]	Install Clamav first, refer to here.
[2]	Install Clamav Server.

[root@prox ~]#

dnf -y install clamav-server clamav-server-systemd

[root@prox ~]#

cp /usr/share/doc/clamav-server*/clamd.conf /etc/clamd.d/squid.conf

[root@prox ~]#

vi /etc/clamd.d/squid.conf

# line 8: comment out

Example

# line 14: uncomment and change

LogFile

/var/log/clamd.squid

# line 66: uncomment and change

PidFile

/var/run/clamd.squid/clamd.pid

# line 70: uncomment

TemporaryDirectory /var/tmp

# line 85: uncomment and change

LocalSocket

/var/run/clamd.squid/clamd.sock

# line 101: uncomment

TCPSocket 3310

# line 195: change

User

squidclamav

[root@prox ~]#

useradd -d /var/tmp -M -s /sbin/nologin squidclamav

[root@prox ~]#

mkdir /var/run/clamd.squid

[root@prox ~]#

chown squidclamav. /var/run/clamd.squid

[root@prox ~]#

cp /usr/share/doc/clamav-server*/clamd.sysconfig /etc/sysconfig/clamd.squid

[root@prox ~]#

vi /etc/sysconfig/clamd.squid

# line 1, 2: uncomment and change

CLAMD_CONFIGFILE=/etc/clamd.d/

squid.conf

CLAMD_SOCKET=/var/run/

clamd.squid

/clamd.sock

[root@prox ~]#

vi /etc/tmpfiles.d/clamd.squid.conf

# create new

d /var/run/clamd.squid 0755 squidclamav squidclamav -

[root@prox ~]#

vi /usr/lib/systemd/system/clamd@.service

# add follows to the end

[Install]
WantedBy=multi-user.target

[root@prox ~]#

touch /var/log/clamd.squid

[root@prox ~]#

chown squidclamav. /var/log/clamd.squid

[root@prox ~]#

chmod 600 /var/log/clamd.squid

[root@prox ~]#

systemctl start clamd@squid

[root@prox ~]#

systemctl enable clamd@squid

[3]	Install c-icap.

[root@prox ~]#

dnf -y install gcc make

[root@prox ~]#

curl -L -O http://downloads.sourceforge.net/project/c-icap/c-icap/0.3.x/c_icap-0.3.5.tar.gz

[root@prox ~]#

tar zxvf c_icap-0.3.5.tar.gz

[root@prox ~]#

cd c_icap-0.3.5

[root@prox c_icap-0.3.5]#

./configure

[root@prox c_icap-0.3.5]#

make

[root@prox c_icap-0.3.5]#

make install

[root@prox c_icap-0.3.5]#

[root@prox ~]#

cp /usr/local/etc/c-icap.conf /etc

[root@prox ~]#

vi /etc/c-icap.conf

# line 140: change admin address

ServerAdmin

root@srv.world

# line 149: change hostname

ServerName

prox.srv.world

# line 517: add

Service squidclamav squidclamav.so

[root@prox ~]#

vi /etc/tmpfiles.d/c-icap.conf

# create new

d /var/run/c-icap 0755 root root -

[root@prox ~]#

vi /usr/lib/systemd/system/c-icap.service

# create new

[Unit]
Description=c-icap service
After=network.target

[Service]
Type=forking
PIDFile=/var/run/c-icap/c-icap.pid
ExecStart=/usr/local/bin/c-icap -f /etc/c-icap.conf
KillMode=process

[Install]
WantedBy=multi-user.target

[4]	Install SquidClamav ( Download latest version of it from the following link ). http://sourceforge.net/projects/squidclamav/files/squidclamav/

[root@prox ~]#

curl -L -O http://downloads.sourceforge.net/project/squidclamav/squidclamav/6.13/squidclamav-6.13.tar.gz

[root@prox ~]#

tar zxvf squidclamav-6.13.tar.gz

[root@prox ~]#

cd squidclamav-6.13

[root@prox squidclamav-6.13]#

./configure --with-c-icap

[root@prox squidclamav-6.13]#

make

[root@prox squidclamav-6.13]#

make install

[root@prox squidclamav-6.13]#

[root@prox ~]#

ln -s /usr/local/etc/squidclamav.conf /etc/squidclamav.conf

[root@prox ~]#

vi /etc/squidclamav.conf

# line 18: change( destination URL for redirect. Create it first )

redirect

http://www.srv.world/error.html

# line 27: change( same with clamd )

clamd_local

/var/run/clamd.squid/clamd.sock

[5]	Configure Squid.

[root@prox ~]#

vi /etc/squid/squid.conf

# add follows to the end

icap_enable on
icap_send_client_ip on
icap_send_client_username on
icap_client_username_header X-Authenticated-User
icap_service service_req reqmod_precache bypass=1 icap://127.0.0.1:1344/squidclamav
adaptation_access service_req allow all
icap_service service_resp respmod_precache bypass=1 icap://127.0.0.1:1344/squidclamav
adaptation_access service_resp allow all

[root@prox ~]#

systemctl start c-icap

[root@prox ~]#

systemctl enable c-icap

[root@prox ~]#

systemctl restart squid

[6]	It's OK all. Next, try to access to the site below from a ClientPC with Web browser, http://eicar.org/85-0-Download.html then, click the test Virus "eicar.com" to make sure to redirect the site you configured.

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