docs: RFC for seccomp-notify network enforcement#14
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Design proposal for kernel-level domain/IP filtering using SECCOMP_RET_USER_NOTIF. Alternative to Landlock TCP port restriction for standalone deployments without a proxy. Implementation: ~300-500 LOC, 2-3 weeks. All kernel features available on RHEL 9 / OpenShift 4.18. Ref: NVIDIA#899
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Summary
Design-only RFC for kernel-level domain/IP filtering using seccomp-notify
(
SECCOMP_RET_USER_NOTIF). The supervisor interceptsconnect()at thesyscall dispatch boundary, evaluates against a DNS-pinned allowlist, and
performs on-behalf-of operations via
pidfd_getfd().This is a design document, not an implementation. The RFC lives at
docs/rfcs/seccomp-notify-network-enforcement.md.Relationship to other PRs
These are complementary, not competing. Landlock port restriction forces traffic
through the proxy. seccomp-notify provides domain filtering at the syscall level
when no proxy is available.
Effort estimate
~300-500 LOC, 2-3 weeks for implementation (separate PR).
Assisted-By: Claude Code