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#Wireshark capture filter to specific top level domain how to
#Wireshark capture filter to specific top level domain verification
#Wireshark capture filter to specific top level domain windows

To find an IP address for a specific domain, resolve the IP address of the specific domain using nslookup as shown below.

NOTE: Make sure to mark the time of the test (when the issue has been reproduced), along with the domain being accessed

#Wireshark capture filter to specific top level domain windows

Wireshark can be used for capturing the same on Windows On macOS, use tcpdump: sudo tcpdump -i all -k INP -w gptest.pcapng Always take packet captures for both physical and tunnel interface when reporting split-tunnel issues to Palo Alto Networks support. This is considered the most reliable method to track the traffic for specific domains.

To track traffic for a specific domain, enable wireshark (or tcpdump) packet captures on the client machine on the physical and tunnel (utun) interface.

More information can be found in this article: Information about Network Monitor 3.

For application visibility on Windows platforms, Microsoft Network Monitor can also be utilized.

We can also utilize 'whois' lookup utility to find the public IP address associated with specific domains or ISPs.

On macOS, use ‘netstat -arn’ or 'lsof -n -i | grep ' command, and on a Windows machine, this ‘netstat -anob’ command can be used.

You can also verify the connection table on the client machine and confirm that specific application connections are going via physical interface and not the tunnel interface.

Make sure to mark the time of the test (when the issue has been reproduced), along with the domain being accessed

Change the debug level to “Dump”, to make sure that PanGPS.log will contain the details related to split-tunnel functionality (Settings -> Troubleshooting -> Logging Level).

Gpsplit :933 0x59bc4620 binding to interface en0, index 3 NOTE: If an FQDN resolves to multiple IP addresses, all the IP addresses will be added to the exclude rules. Gpsplit :860 Rule 3: 3APP /Applications/RingCentral for Mac.app/Contents/MacOS/Softphone > 2PHY (0) Gpsplit :860 Rule 2: 3APP %AppData%\Local\RingCentral\SoftPhoneApp\Softphone.exe > 2PHY (0) Gpsplit :860 Rule 1: 3APP %AppData%\Local\RingCentral\SoftPhoneApp\SoftPhoneMapiBridge.exe > 2PHY (0) Here, Rule 0 to 3 corresponds to the IP address of the domain and application we have configured on the gateway.

Thus, traffic for the RingCentral application will be excluded from the VPN tunnel. In the logs below, we can see that ‘.’ application is bound to physical interface en0. Within the GlobalProtect logs bundle, also review gpsplit.log (the equivalent file on the macOS is PanNExt.log) and see the split tunnel and application rules applied.Applications/RingCentral for Mac.app/Contents/MacOS/Softphone %AppData%\Local\RingCentral\SoftPhoneApp\SoftPhoneMapiBridge.exe %AppData%\Local\RingCentral\SoftPhoneApp\Softphone.exe Within GlobalProtect logs bundle, review PanGPS.log and verify that based on the configuration on the gateway GlobalProtect receives:.

#Wireshark capture filter to specific top level domain how to

For steps on collecting GlobalProtect logs refer to: How to Collect Logs From GlobalProtect Clients. This can be verified by collecting GlobalProtect logs.

First step is to verify whether the configuration on the gateway for ‘Split Tunnel Domain’ or ‘Split Application’ has been pushed correctly on the GlobalProtect app or not.

To verify and troubleshoot the split tunnel domain and application traffic features, you can utilize the following steps:

#Wireshark capture filter to specific top level domain verification

The following verification and troubleshooting steps are written with consideration of the configuration specified in GlobalProtect: Implement Split Tunnel Domain, Applications, Exclude Video Traffic Configuration and applies to any such configurations. For a configuration guide of this feature, refer to Optimized Split Tunneling for GlobalProtect and GlobalProtect: Implement Split Tunnel Domain and Applications.

This will help administrators during implementation and operational maintenance of these features. The objective of this document is to provide enterprise administrators with troubleshooting tips and tricks related to Split Tunnel Domain & Applications and Exclude Video Traffic features. Hence, customers are advised to carefully review before enabling this feature and then decide whether the split tunnel meets their environment needs. NOTE: Split-tunnel traffic is not inspected by next-generation firewall and, therefore, does not have the threat-protection offered by Palo Alto Networks.