rrinehart - Thanks for confirming.

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.

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

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

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.

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

Need to do more test.

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.

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