Packet Filtering Ruleset for Network

Absolute newbie here, I have to write a filtering rule set to block all inbound connections to a Web server (IP address = 200.1.2.3), an external e-mail server (IP address = 200.1.2.4), and some internal workstations with network address of 192.168.1.0/24. Here's my attempt, but I'm not sure if I'm on the right path. Here's my table:

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Action	Source Address	Dest Address	Protocol	Source Port	Dest Port
Deny	Any	200.1.2.3	Any	Any	80
Deny	Any	200.1.2.4	Any	Any	25
Deny	Any	192.168.1.1/24	Any	Any	Any
Deny	Any	192.168.2.1/24	Any	Any	Any
Deny	Any	192.168.3.1/24	Any	Any	Any