In this example,

Rule 3
Source IP : 192.168.120.0
Source Port : Any
Dest Port: Any
Destination Port : Any
Action: Allow

Rule 4
Source IP : 192.168.120.0
Source Port : Any
Dest Port: 192.168.120.4 ( DNS server )
Destination Port : 53
Action: Allow
Doesn't rule 3 nullify rule 4, as rule 3 allows 192.168.120.0 to connect to anything on any port, which means that it could connect to the DNS server as well ?