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Dear Experts, <br />
I want to allow only specified IP addresses(not subnet) to access through PIX 515 and block other all IPs which are located in same subnet or different subnet. &nbsp;Therefore, how to do it by using PIX 515. Could you give a suggesion. 
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Dear Experts, 
I want to allow only specified IP addresses(not subnet) to access through PIX 515 and block other all IPs which are located in same subnet or different subnet.  Therefore, how to do it by using PIX 515. Could you give a suggesion. 

allowed IP addresses

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).