[river0525]

Summary by CodeRabbit

• バグ修正
  • 設定から読み込んだ、数字とピリオドのみで構成されるDNSサーバー宛ての通信（UDP/TCP、ポート53）が許可されるようになりました。
  • DNSサーバーの設定がない場合や形式が対象外の場合も、ファイアウォールの設定を続行します。
  • Docker埋め込みDNSへの通信は引き続き利用でき、任意の宛先へのDNS通信は許可されません。

[coderabbitai]

Caution

Review failed

The pull request is closed.

Recent review info

Run configuration

• Source mode: Auto
• Repository: AtCoder-NoviSteps/AtCoderNoviSteps
• Branch: fix/devcontainer-upstream-dns
• File: .coderabbit.yaml
• Commit: 0ef0d96
• Layers: Repository YAML
• Review profile: ASSERTIVE
• Plan: Advanced
• Run ID: 965779b8-6641-4769-bf41-e0690997e036

Commits

Reviewing files that changed from the base of the PR and between 805c97c and 0ef0d96.

Files selected for processing: 1

• .devcontainer/init-firewall.sh

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Walkthrough

/etc/resolv.conf の ExtServers コメントから DNS アドレスを読み込みます。値が数字とピリオドのみで構成される場合、その宛先への UDP/TCP 53 番ポートを許可します。埋め込み DNS 127.0.0.11 の許可ルールは維持します。

Changes: DNS ファイアウォール設定

Layer / File(s)	Summary
上流 DNS の許可ルール .devcontainer/init-firewall.sh	ExtServers から読み取った値が数字とピリオドのみで構成される場合、その宛先への UDP/TCP 53 番ポートの許可ルールを追加します。それ以外の値はスキップします。埋め込み DNS 127.0.0.11 の許可ルールは維持します。

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Merge Risk: Minimal · up to b89f0

Existing DNS failures may persist on older Docker versions or during firewall reinitialization, but this change does not make them worse.

Pre-merge checks: 5

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		タイトルは、上流 DNS への問い合わせをファイアウォールが遮断する問題の修正を明確に示しています。変更内容の主目的と一致しています。
Docstring Coverage		No eligible functions found in the changed files. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentat…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

No eligible functions found in the changed files. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 0 functions across 1 files.

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[coderabbitai]

• Fix comments: Fix CodeRabbit comments on this PR

[KATO-Hiro]

修正していただき、ありがとうございます

前段の検証は使用されていない可能性が高いと判断し、削除しました
ご了承ください

LGTM です
マージします