Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add commands/wangke19/gemini-ai-helpers/node-kernel-iptablesgit clone --depth 1 https://github.com/wangke19/gemini-ai-helpersWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/commands/wangke19/gemini-ai-helpers/node-kernel-iptables)<a href="https://agentmods.dev/commands/wangke19/gemini-ai-helpers/node-kernel-iptables"><img src="https://agentmods.dev/badge/commands/wangke19/gemini-ai-helpers/node-kernel-iptables.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00012 | $0.02321 |
| Opus 5 | $0.00006 | $0.01161 |
| Sonnet 5 | $0.00002 | $0.00464 |
| Haiku 4.5 | $0.00001 | $0.00232 |
Grade A, and why
node-kernel-iptables scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 233 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Name
openshift:node-kernel-iptables
Synopsis
/openshift:node-kernel-iptables <node> <image> --command <cmd> [--table <table>] [--filter <params>]
Description
The openshift:node-kernel-iptables command allows interaction with the kernel to list packet filter rules. Iptables and ip6tables are used to inspect the tables of IPv4 and IPv6 packet filter rules in the Linux kernel.
In OVN-Kubernetes environments, iptables rules are crucial for:
- Network address translation (NAT) for services
- Packet filtering and security policies
- Connection tracking integration
- SNAT/DNAT for egress and ingress traffic
- Debugging packet flow issues
The command uses oc debug to create an ephemeral container with host network access, then executes iptables operations. The image must contain iptables or ip6tables CLI utilities.
Implementation
This command invokes the openshift-node-kernel skill which provides kernel-level packet filter inspection capabilities:
- Parameter Validation: Validates required node, image, and command parameters
- Utility Check: Verifies the debug image contains
iptablesorip6tablesutilities - Command Execution: Uses
oc debugto create ephemeral container and execute iptables commands - Output Filtering: Removes common oc debug warnings to provide clean output
Skill Reference:
- Implementation:
extensions/openshift/skills/openshift-node-kernel/node-kernel-iptables.sh - Helper functions:
extensions/openshift/skills/openshift-node-kernel/kernel-helper.sh - Documentation:
extensions/openshift/skills/openshift-node-kernel/SKILL.md
Parameters
Required Parameters
-
node: Name of the Kubernetes node where iptables rules should be extracted.
- Must be a valid node name in the cluster
- Example:
ovn-control-plane,ovn-worker,worker-0
-
image: Container image to use for creating a debug connection to the node.
- Must contain
iptablesand/orip6tablesutilities - Common images:
registry.redhat.io/rhel9/support-toolsnicolaka/netshoot
- Must contain
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- today First seen · 233 lines · 12 tokens per session scan A a54e4de75cb8
node-kernel-iptables is a command published in the GitHub repository wangke19/gemini-ai-helpers (2 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 12 tokens to every session and 2,321 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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