Topical Takes

Short, opinionated posts on eBPF, Linux internals, and the tools we all run in production.

AlleBPF59linux59yeet56AI agents29observability20networking12security10claude-code7containers4HTTP4production4sandboxing4tcpdump4tracing4uprobes4API debugging3bcc3bpftrace3debugging3egress3exectop3incident-response3kubernetes3omarchy3supply chain3TLS3troubleshooting3audit2auditd2BSON2capabilities2ci2codex2databases2DNS2execsnoop2hyprland2MongoDB2mysql2oom2packet-capture2performance2permissions2postgres2processes2quickshell2runtime-debugging2ssh2TCP2802.111agent-security1agentic network operations1ai-sre1bar-widget1benchmarks1biolatency1bpf-verifier1bubblewrap1build-performance1cgroups1Cilium1CO-RE1confidential-computing1context-switches1cpu-accounting1cryptojacking1devops1docker1exfiltration1hardening1integration-testing1kprobes1kworker1landlock1latency1local-llm1logging1make1MCP1memory1n-plus-one1nodejs1npm1off-cpu1ollama1openssl1opentelemetry1plugin1policy1postinstall1prepared statements1privilege1proc-filesystem1process-attribution1process-masquerading1proctop1profiling1query-shapes1Redis1refusal1RESP1rf1root-cause-analysis1runqlat1schedstat1seccomp1slowlog1SQLite1SSRF1stratum1sudo1syscall1systemd1tcp-retransmits1terminal-bench1threat-modeling1tunnels1websocket1wifi1wireguard1wireless1wss1yeetkit1+123 more

All eBPF59 linux59 yeet56 AI agents29 observability20 networking12 security10 claude-code7 containers4 HTTP4 production4 sandboxing4 tcpdump4 tracing4 uprobes4 API debugging3 bcc3 bpftrace3 debugging3 egress3 exectop3 incident-response3 kubernetes3 omarchy3 supply chain3 TLS3 troubleshooting3 audit2 auditd2 BSON2 capabilities2 ci2 codex2 databases2 DNS2 execsnoop2 hyprland2 MongoDB2 mysql2 oom2 packet-capture2 performance2 permissions2 postgres2 processes2 quickshell2 runtime-debugging2 ssh2 TCP2 802.111 agent-security1 agentic network operations1 ai-sre1 bar-widget1 benchmarks1 biolatency1 bpf-verifier1 bubblewrap1 build-performance1 cgroups1 Cilium1 CO-RE1 confidential-computing1 context-switches1 cpu-accounting1 cryptojacking1 devops1 docker1 exfiltration1 hardening1 integration-testing1 kprobes1 kworker1 landlock1 latency1 local-llm1 logging1 make1 MCP1 memory1 n-plus-one1 nodejs1 npm1 off-cpu1 ollama1 openssl1 opentelemetry1 plugin1 policy1 postinstall1 prepared statements1 privilege1 proc-filesystem1 process-attribution1 process-masquerading1 proctop1 profiling1 query-shapes1 Redis1 refusal1 RESP1 rf1 root-cause-analysis1 runqlat1 schedstat1 seccomp1 slowlog1 SQLite1 SSRF1 stratum1 sudo1 syscall1 systemd1 tcp-retransmits1 terminal-bench1 threat-modeling1 tunnels1 websocket1 wifi1 wireguard1 wireless1 wss1 yeetkit1

October 19, 2026

Does the Codex Sandbox Block Network Access on Linux? (2026)

workspace-write ships with network_access = false, so sandboxed commands are put in a network namespace. What that never covered is Codex itself: model requests, MCP connections, web search and connector calls all originate outside the command sandbox. How to tell which side a connection came from.

AI agentscodexsandboxingsecuritynetworkingeBPFlinuxyeet

September 18, 2026

How Do I Sandbox Codex on Linux? (2026)

Codex enforces its Linux sandbox with bubblewrap plus seccomp, so it inherits bubblewrap's properties and its failure modes. What read-only, workspace-write and danger-full-access actually permit, why OpenAI rejected the legacy Landlock path, what the network proxy does not filter, and how to tell the sandbox is working rather than silently failing with exit code 0.

codexai-agentssandboxingbubblewrapseccompeBPFlinuxyeet