Hi Matt, Sorry, I somehow overlooked your last message. I tested also with the released version of Big Sur 11.2 and it is the same. In Catalina, I see the proxy settings being applied when parsing the IP packets but not in all versions of Big Sur. Our customer is asking for a "Radar" ticket so that they follow the issue from their end. Where can I get that information? Thanks for the help. Dankira.

Thank you, Matt. Dankira.

This issue is fixed in Big Sur Version 11.3 Beta (20E5210c).

Thank you, Matt. I submitted a bug: https://feedbackassistant.apple.com/feedback/8983799 Thanks, Dankira.

The call for sysConf[kSCPropNetProxiesProxyAutoConfigURLString] as? String actually shows what’s set in the systemwide proxy setting. However, it is not giving the desired effect. I am not sure if this works because the Systemwide proxy settings gets invalidated when a packet-tunnel extension is loaded. This has been my experience working with iOS and OSX. So, I am not sure if this is a valid test.  I have been doing my test by hard-coding the proxy return. It always return something like “return "PROXY x.x.x.x:80"; . Nothing going DIRECT. I see the agent downloading the pac script when running wireshark so I am sure the setting is received by the packet-tunnel framework. The issue is more that each http request is not utilizing the proxy setting.  We’re using Packet Tunnel Provider in destination IP mode. We are using “packetFlow.readPackets { }” interface to pull data. I also tried pushing “Global Proxy” through JAMF. I see only “Description” and “Auto” being pushed. I don’t see “ProxyPACURL” being pushed onto the MacBook. I am not sure if this an issue with Apple or JAMF. The agent is still working under Catalina but not on Big Sur. I am wondering as to what changed. Thanks, Dankira.

Need to do more test.

The issue is both on Big Sur Verrsion 11.0.1 and 11.1 Thanks, Dankira.

If I set it manually from "System Preferences -> Network -> WiFi -> Advanced -> Proxies -> Automatic Proxy Configuration", it works. If I push a "Global HTTP Proxy" profile, it works when using Chrome but not with Safari. Thanks, Dankira.

There was actually an outage this morning since 8:00AM EST. It's fixed now..like 5minutes ago.

This server is acting up again. It started again around 10:45 EST.

I am wondering if anyone here came to any solution in regard to upload issue through packet tunnel. During uploading on high speed network, we always get this error “utun_output - ctl_enqueuembuf failed: 55”. Download is fine. We tried tuning some of kernel buffer sizes (going through “sysctl -a”) but no success. We're testing on macOS Monterey ver. 12.2 Apple M1 chip. Any response is greatly appreciated. Thanks, Dankira.

rrinehart - Thanks for confirming.