Question 1

What are the essential Wireshark display filters for Cisco devices?

Accepted Answer

Use 'cdp || hsrp || eigrp || vtp || dtp || sccp || pagp' to filter proprietary Cisco control plane protocols, HSRP redundancy, EIGRP routing, VTP/DTP trunking, and SCCP VoIP traffic in Wireshark.

Question 2

How to filter Palo Alto Networks GlobalProtect traffic in Wireshark?

Accepted Answer

Use the display filter 'tcp.port in {4795 4796 4797} || udp.port == 4501 || pan_oss' to isolate GlobalProtect portal, gateway, IPsec VPN tunnels, and PAN-OS HA state sync.

Question 3

How to filter F5 BIG-IP persistence cookies and mcpd in Wireshark?

Accepted Answer

Filter F5 load balancer sessions using 'http.cookie contains "BIGipServer" || http.cookie contains "TS" || tcp.port == 4353 || http.server contains "BigIP"' to track server persistence and internal control traffic.

Question 4

How to isolate Zscaler cloud proxy traffic in Wireshark?

Accepted Answer

Use 'tls.handshake.extensions_server_name contains "zscaler" || tls.handshake.extensions_server_name contains "zscloud" || http.host contains "zscaler" || http.user_agent contains "Zscaler"' to capture Zscaler TLS SNIs, PAC files, and ZCC agent traffic.