We have a few users that have real difficulty with reestablishing connectivity via netskope when their macs come out of sleep/hibernate. The common thread between them is that they are also using dongles with ethernet connections to the internet.
One fix that appears to help some users is turning off IPV6 ( changing to link-local) on any ethernet dongle that is attached.
Stuff like this: 2023/10/18 10:48:21.862277 stAgentNE p434 t53767 critical nsDNSProcessor.cpp:149 dnsProcessor Failed to get DNS resolver values 2023/10/18 10:48:21.993231 stAgentNE p434 t16007 info networkMonitor.cpp:358 networkMonitor New Network Change event received 2023/10/18 10:48:21.994177 stAgentNE p434 t16007 info networkMonitor.cpp:337 networkMonitor Best route interface new ip 0.0.0.0
Netskope support is blaming the dongles, but there are no issues with NS is disabled.
@mdmeow12123 am only disabling IPv6 on specific clients when DNS failures occur. It seems to only affect those clients using a public IPv6 address (starts with 2001:xxxx) and with some ISP's or some Android phone hotspots. For these reasons, we have not disabled IPv6 for everyone. Also, this was only reported for our Windows clients.