Hi, my ISP give me this info: 
IP: 213.215.114.87, Mask: 255.255.255.224, Gateway: 213.215.114.87, DNS1:62.168.101.70

Now I need pass trought monowall but its problem... what i did wrong, what are necessary settings? 
(i need only firewall)

System
General setup: add DNS srvers (others fields are left by default)
Interfaces: 
LAN - 192.168.100.100 / 24, 
WAN: Type: Static, IP 213.215.114.87 / 27, Gateway: 213.215.114.1, (others fields are left by
default) 

That is all what i did. Is it enought? 

IP address of my PC: 192.168.100.87, mask: 255.255.255.0, gateway: 192.168.100.100

thanks