Vpn Security Check

What it does

When your agent uses it

• User asks check security
• Has security concerns

Example prompts

• “check security”
• “is my VPN safe”
• “audit security”
• “/vpn-security-check”

Requirements

• Python 3

Workflow steps

7 steps, taken from the step headings in SKILL.md.

1. 1SSH Hardening
2. 2Firewall
3. 3Intrusion Prevention
4. 4VPN Service Security
5. 5Camouflage
6. 6Secrets Management
7. 7System Updates

What it can do on your machine

Read from SKILL.md and the folder at commit 486bf50. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • python
  • git
  • apt

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Vpn Security Check loads about 1.5k tokens when it runs. Until then it costs about 54 tokens; SKILL.md has 651 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~54

When it runs · the whole SKILL.md, loaded when a task matches

~1.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

• NoteMentions a .env fileSKILL.md:124

  **6a. .env Not in Git**

• NoteMentions a .env fileSKILL.md:126

  nd (local): Check `.gitignore` includes `.env` AND `git ls-files .env` returns nothing

• NoteMentions a .env fileSKILL.md:130

  | .env is gitignored and not tracked | PASS |

• NoteMentions a .env fileSKILL.md:131

  | .env is tracked in git | CRITICAL FAIL — `git rm --cached .env` immediately. Credentials are exposed! |

• NoteMentions a .env fileSKILL.md:177

  6a. .env в git:            [PASS/CRITICAL]

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from Sergei-thinker/vpn-setup at commit 486bf50, republished under its MIT licence (© Sergei-thinker). 651 words, ~1,548 tokens.

name

vpn-security-check

description

Infrastructure security audit for VPN server. Use when user asks 'check security', 'is my VPN safe', 'audit security', 'security check'. Also use after deployment when user has security concerns.

EVERY CHECK MUST RUN A COMMAND. NO ASSUMPTIONS.

Аудит безопасности VPN-сервера:

  SSH:
    1a. SSH-порт:              [PASS/FAIL]
    1b. Парольная авторизация: [PASS/WARN]
  
  Firewall:
    2a. UFW:                   [PASS/FAIL]
    2b. Открытые порты:        [PASS/WARN]
  
  Защита от вторжений:
    3a. fail2ban:              [PASS/FAIL]
  
  VPN-сервис:
    4a. Панель 3X-UI:          [PASS/WARN]
    4b. Версия Xray:           [PASS/WARN]
  
  Камуфляж:
    5a. Nginx:                 [PASS/WARN]
  
  Секреты:
    6a. .env в git:            [PASS/CRITICAL]
    6b. Файл credentials:     [PASS/WARN]
  
  Обновления:
    7.  Системные:             [PASS/WARN]

Итого: X/10 проверок пройдено

© Sergei-thinker, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .claude/skills/vpn-security-check of Sergei-thinker/vpn-setup.

Open the folder on GitHubat commit 486bf50