Script to Disable Mouse Right Click

Script to Disable Mouse Right Click

<script type="text/javascript">
    $(document).ready(function() {
        $(".disableEvent").on("contextmenu",function(){
             alert('right click disabled');
           return false;
        }); 
    });
</script>

Script to Disable Cut Copy & Paste

Using this script, you can prevent user to cut (CTRL+X), copy (CTRL+C) and paste (CTRL+V)content from your web pages.

<script type="text/javascript">
    $(document).ready(function() {
       $('.disableEvent').bind('cut copy paste', function (e) {
        e.preventDefault();
    });
    });
</script>




As far as I can see, the secret sauce is, that Ctrl+S does NOT fire the keypress event, only the keydown event.






$(document).bind('keydown', 'ctrl+s', function(e) {
    e.preventDefault();
    alert('Ctrl+S');
    return false;
});
Only with jQuery:



$(document).bind('keydown', function(e) {
  if(e.ctrlKey && (e.which == 83)) {
    e.preventDefault();
    alert('Ctrl+S');
    return false;
  }
});

Disable saving web page with CTRL-S using JQuery





Use below JQuery code to disable saving web page using "CTRL-S" keyword 
directly. This will work well on all browser (IE, Firefox, Google 
chrome).



// To prevent saving web site directly using "ctrl-s"

$(document).bind('keydown keypress', 'ctrl+s', function () {
        $('#save').click();
        return false;
    });

 

firewallD command add & remove

port enable or not 
[root@proxy ]# firewall-cmd --zone=public --query-port=80/tcp

remove rules:

firewall-cmd --permanent --zone=public --remove-forward-port port=80:proto=tcp:toport=3128:toaddr=192.168.1.179
success
 

firewall-cmd --reload

remove port nmuber: 

[root@proxy ~]# firewall-cmd --permanent --zone=public --remove-port=80/tcp
success
[root@proxy ~]# firewall-cmd --reload
success
 

list firewall rules:

firewall-cmd --list-all

list active zone


firewall-cmd --get-active-zone

How to Configure Squid 3.x as Transparent Proxy on CentOS 7

 

vi /etc/squid/squid.conf

# Squid normally listens to port 3128

http_port 3128  transparent

visible_hostname proxyserver.nagarajanewlife.com

acl our_network  src 192.168.1.0/24

http_access allow our_network

firewall-cmd --permanent --zone=public --add-forward- port=80:proto=tcp:toport=3128:toaddr=192.168.1.175

firewall-cmd --permanent --zone=public --add-port=3128/tcp
firewall-cmd --permanent --add-masquerade

firewall-cmd --reload

systemctl restart squid

# firewall-cmd --list-all


$ sudo vi /etc/sysctl.conf
then change the following parameter to ‘1’, i.e.
net.ipv4.ip_forward = 1
Save file & exit. Now execute the following command to implement the changes made,
$ sudo sysctl -p






Dhcp server configure 

vi /etc/dhcp/dhcpd.conf
edit the default gateway 192.168.1.175 # systemctl restart squid

How to Set Time centos 7

timedatectl set-timezone Asia/Kolkata

timedatectl set-ntp true

timedatectl set-ntp 1




 or

timedatectl set-timezone UTC

      timedatectl set-time 15:58:30

Failed to set time: Automatic time synchronization is enabled
 

timedatectl set-ntp false 

Setup network on CentOS 7 minimal

First, type “nmcli d” command in your terminal for quick list ethernet card installed on your machine:











 

Type “nmtui” command in your terminal to open Network manager. After opening Network manager chose “Edit connection” and press Enter (Use TAB button for choosing options).

service network restart

ERROR: No forward-proxy ports configured centos 7

# tail -f /var/log/squid/cache.log 
ERROR: No forward-proxy ports configured
ERROR: No forward-proxy ports configured
ERROR: No forward-proxy ports configured
ERROR: No forward-proxy ports configured

Solution:

http_port 3128 

http_port 8080 intercept

how to install squid centos 7 minmal

#yum -y install epel-release

 #  yum -y update

   #yum clean all

#yum install squid -y

 
 

how to remove port number in firewalld centos 7

Solution: Do not forget the --runtime-to-permanent

$ firewall-cmd --zone=public --remove-port=10050/tcp
$ firewall-cmd --runtime-to-permanent 
$ firewall-cmd --reload 

 

# firewall-cmd --list-all