dear all..
i wish if someone could help me to find a solution to block viber application on mobile phones and PC's
i tried to block the following ports provided by Viber ,but no success

TCP: 5242,4244
UDP: 5243 , 9785

its really urget and would appreciate any help

Post your config and rules you already set for the viber blocking. Someone could tell you what is wrong.

/ip firewall address-list
add address=1.1.1.0/24 list=limitted-group
src-address-list=limitted-group
/ip firewall filter
add action=drop chain=forward dst-port=5242 protocol=tcp src-address-list=\
limitted-group
add action=drop chain=forward dst-port=4244 protocol=tcp src-address-list=\
limitted-group
add action=drop chain=forward dst-port=5243 protocol=udp src-address-list=\
limitted-group
add action=drop chain=forward dst-port=9785 protocol=udp src-address-list=\
limitted-group
/ip firewall mangle
add action=mark-packet chain=forward dst-port=80,433 new-packet-mark=new-PM \
passthrough=no protocol=tcp src-address-list=limitted-group
add action=mark-connection chain=forward dst-port=80,344 new-connection-mark=\
MC packet-mark=new-PM protocol=tcp src-address-list=limitted-group

its not work for me !!

Will anyone help us to block Viber. Plz, post Layer 7 protocol script[/color] to block viber

Vibe uses HTTPS protocols, so?

Rather than trying to block port/protocol combinations, perhaps block outbound traffic to the Viber IP space? I'm not terribly familiar with the application, but I'm sure they have some subnet of IP addresses used for logins and coordination between its users. If you can block traffic to their command and control, you should be able to kill the app.

Rather than trying to block port/protocol combinations, perhaps block outbound traffic to the Viber IP space? I'm not terribly familiar with the application, but I'm sure they have some subnet of IP addresses used for logins and coordination between its users. If you can block traffic to their command and control, you should be able to kill the app.

Looks like they're hosted on Amazon AWS, so blocking by IP could potentially disable other services you don't want to block. Perhaps a layer 7 regexp blocking viber.com requests?

I wonder if their CnC depends on some hostname in DNS that can be interfered with.....