Cocoa Packet Analyzer Cocoa Packet Analyzer is a native Mac OS X implementation of a network protocol analyzer and packet sniffer. CPA supports the industry-standard PCAP packet capture format for reading, capturing and writing packet trace files. Similar to FireSheep it allows you to listen on network communications on unsecured networks Features Packet capturing (NOT available for the Mac App Store version!). Analyze, display and filter packet trace files. Supports PCAP packet capture format. QuickLook plugin to get an overview already in Finder. Intel 64-bit CPU support. Printing of packets. Japanese and German localization. Supported Types and Protocols: Ethertypes: ARP, IP (v4/v6), PPP, PPPoED/S, 802.1Q VLAN, MPLS Linktypes: Loopback, PPP IP-Protocols: IP (v4/v6), TCP, UDP, ICMP (v4/ v6), IGMP, MPLSinIP, L2TP, Mobility PPP-Protocols: IP, LCP, IPCP (v4/v6), CCP, PAP, CHAP PPPoE Discovery and Sessionstages Port based protocol detection: DHCPv6, L2TP, RADIUS, ESP Download MacUpdate