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 skills/validatorsdao/slv/slv-nftablesnpx skills add ValidatorsDAO/slv --skill slv-nftablesgit clone --depth 1 https://github.com/ValidatorsDAO/slvWrote 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/skills/validatorsdao/slv/slv-nftables)<a href="https://agentmods.dev/skills/validatorsdao/slv/slv-nftables"><img src="https://agentmods.dev/badge/skills/validatorsdao/slv/slv-nftables.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 | $0.00128 | $0.02124 |
| Opus 5 | $0.00064 | $0.01062 |
| Sonnet 5 | $0.00026 | $0.00425 |
| Haiku 4.5 | $0.00013 | $0.00212 |
Grade B, and why
slv-nftables scanned grade B with 1 finding 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 4d ago.
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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
sudo nft add element inet filter allowAll_v4 { 198.51.100.42 } How it starts
The opening of the file, as written. The whole thing — 194 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SLV nftables Skill
Inventory-driven nftables ruleset deployer. One playbook
(cmn/deploy_nftables.yml) serves every slv role — Hermes, Pythnet
RPC, Solana RPC, validators — by reading the firewall description from
the same inventory that already configures the service itself.
What it does
- Renders
/etc/nftables.conf+ fragments under/etc/nftables.d/and/etc/nftables.sets.d/from Jinja2 templates. - Validates the rendered config (
nft -c) before applying. If validation fails, the previous config is restored and the playbook aborts — you cannot lock yourself out via a bad template. - Applies atomically (
nft -f). - Seeds allowlist sets with IPs from inventory, preserving any
elements added at runtime with
nft add element …so re-running the playbook never wipes manual additions. - Exports the live ruleset back into
/etc/nftables.confand enablesnftables.serviceso the same ruleset is restored on reboot.
Ruleset shape
chain input (default: drop)
├─ accept loopback
├─ accept established/related
├─ accept icmp / icmpv6
├─ banAll_v4 drop (highest priority)
├─ mgmt_ips_v4 accept (full access)
├─ allowAll_v4 accept (runtime additions, full access)
├─ mgmt_ips_v4 → tcp dport ssh_port accept (belt-and-suspenders)
├─ public_tcp_ports / public_udp_ports accept
└─ restricted_ports[]: allow_<port>_v4 accept else drop
Inventory variables
| Variable | Required | Default | Description |
|---|---|---|---|
mgmt_ips_v4 |
yes | — | List of IPv4/CIDR with full access. Empty list aborts the playbook. |
mgmt_ips_v6 |
no | [] |
Same for IPv6 |
ban_ips_v4 |
no | [] |
Hard-deny list (evaluated first) |
ssh_port |
no | 22 |
SSH port to keep open from mgmt |
public_tcp_ports |
no | [] |
TCP ports/ranges accepted from any source |
public_udp_ports |
no | [] |
UDP ports/ranges accepted from any source |
restricted_ports |
no | [] |
Per-port allowlist (see below) |
disable_ufw |
no | true |
Stop/disable ufw to avoid conflict |
preserve_existing |
no | true |
Preserve runtime nft add element additions |
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 4d ago First seen · 194 lines · 128 tokens per session scan B ae969f9e257e
slv-nftables is a skill published in the GitHub repository ValidatorsDAO/slv (89 stars, last pushed 2d ago), licensed Apache-2.0. It adds 128 tokens to every session and 2,124 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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