network setting for Configure Log Level • Available syslog levels are ERR, WARN, INFO, DEBUG, TRACE • MCM log is save in /var/log/syslog Set to Default MCM Configuration Set all configuration if traffic are drop or accept as expected # nft monitor trace a. Add trace_chain before the existing input chain nft add chain inet filter trace_chain { type filter hook prerouting priority -1\; } inet filter trace_chain meta nftrace set 1 c. Monitor trace (you can use another device with ncat tool to test it)dd nftrace flag moxa@moxa-tbbbb1182816:/# sudo nft monitor trace trace id d51bda11

tracing: Why is a packet being dropped or a request rejected. The policy tracing framework allows to trace the policy decision process for both, running workloads and based on arbitrary label defini�ons. Integrated capability of the Linux kernel to accept compiled bytecode that is run at various hook / trace points within the kernel. Cilium compiles BPF programs and has the kernel run them at key points in way to verify if and what policy rules apply between two endpoints. We can use the cilium policy trace to simulate a policy decision between the source and des�na�on endpoints. We will use the example

tracing: Why is a packet being dropped or a request rejected. The policy tracing framework allows to trace the policy decision process for both, running workloads and based on arbitrary label definitions. Integrated capability of the Linux kernel to accept compiled bytecode that is run at various hook / trace points within the kernel. Cilium compiles BPF programs and has the kernel run them at key points way to verify if and what policy rules apply between two endpoints. We can use the cilium policy trace to simulate a policy decision between the source and destination endpoints. We will use the example

tracing: Why is a packet being dropped or a request rejected. The policy tracing framework allows to trace the policy decision process for both, running workloads and based on arbitrary label definitions. Integrated capability of the Linux kernel to accept compiled bytecode that is run at various hook / trace points within the kernel. Cilium compiles BPF programs and has the kernel run them at key points in way to verify if and what policy rules apply between two endpoints. We can use the cilium policy trace to simulate a policy decision between the source and destination endpoints. We will use the example

"application/x-www-form-urlencoded", "Host": "httpbin.org", "User-Agent": "curl/7.79.1", "X-Amzn-Trace-Id": "Root=1-625a7542-3994f1a24d276db65e59c88f" }, "json": null, "origin": "193.138.218.212", -- ----870c3eede45c997d", "Host": "httpbin.org", "User-Agent": "curl/7.79.1", "X-Amzn-Trace-Id": "Root=1-625a755e-2b91ece7042683285bd91332" }, "json": null, "origin": "193.138.218.212", "application/x-www-form-urlencoded", "Host": "httpbin.org", "User-Agent": "curl/7.79.1", "X-Amzn-Trace-Id": "Root=1-62795cf0-2f1afd31178c28137be111d6" }, "json": null, "origin": "193.138.218.212",

"application/x-www-form-urlencoded", "Host": "httpbin.org", "User-Agent": "curl/7.79.1", "X-Amzn-Trace-Id": "Root=1-625a7542-3994f1a24d276db65e59c88f" }, "json": null, "origin": "193.138.218.212", "url": boundary=------------------------ ˓→870c3eede45c997d", "Host": "httpbin.org", "User-Agent": "curl/7.79.1", "X-Amzn-Trace-Id": "Root=1-625a755e-2b91ece7042683285bd91332" }, "json": null, "origin": "193.138.218.212", "url": "application/x-www-form-urlencoded", "Host": "httpbin.org", "User-Agent": "curl/7.79.1", "X-Amzn-Trace-Id": "Root=1-62795cf0-2f1afd31178c28137be111d6" }, "json": null, "origin": "193.138.218.212", "url":

iputils-tracepathV:2, I:31 45 test trace the network path to a remote host ethtool V:94, I:268 739 test display or change Ethernet device settings mtr-tiny V:5, I:47 156 test::low- level trace the network path to a a remote host (curses) mtr V:5, I:42 209 test::low- level trace the network path to a remote host (curses and GTK) gnome-nettool V:0, I:18 2492 test::low- level tools for common network information level check DNS zone information using nameserver lookups dnstracer V:0, I:1 59 test::low- level trace a chain of DNS servers to the source Table 5.1: List of network configuration tools Debian Reference

tracing: Why is a packet being dropped or a request rejected. The policy tracing framework allows to trace the policy decision process for both, running workloads and based on arbitrary label definitions. way to verify if and what policy rules apply between two endpoints. We can use the cilium policy trace to simulate a policy decision between the source and destination endpoints. We will use the example [https://cilium.readthedocs.io/en/latest/gettingstarted/minikube/#getting-started-using-minikube] to trace the policy. In this example, there is: deathstar service identified by labels: org=empire, class=deathstar

tracing: Why is a packet being dropped or a request rejected. The policy tracing framework allows to trace the policy decision process for both, running workloads and based on arbitrary label definitions. way to verify if and what policy rules apply between two endpoints. We can use the cilium policy trace to simulate a policy decision between the source and destination endpoints. We will use the example HTTP-Aware Policy Enforcement Guide [https://cilium.readthedocs.io/en/latest/gettingstarted/http/] to trace the policy. In this example, there is: deathstar service identified by labels: org=empire, class=deathstar

tracing: Why is a packet being dropped or a request rejected. The policy tracing framework allows to trace the policy decision process for both, running workloads and based on arbitrary label definitions. way to verify if and what policy rules apply between two endpoints. We can use the cilium policy trace to simulate a policy decision between the source and destination endpoints. We will use the example [https://cilium.readthedocs.io/en/latest/gettingstarted/minikube/#getting-started-using-minikube] to trace the policy. In this example, there is: deathstar service identified by labels: org=empire, class=deathstar