---
title: "サービス拒否（denial of service）"
description: "セキュリティ攻撃方法の一つ。サービスできない正当なリクエストなどを大量に送りつけてシステムを過負荷状態にする。"
type: term
term_id: 667
language: 日本語
language_code: jp
canonical: "https://glossary.istqb.org/jp/term/denial-of-service-5"
slug: "サーヒス拒否-denial-of-service"
url: "https://istqb-glossary.page/jp/%E3%82%B5%E3%83%BC%E3%83%92%E3%82%B9%E6%8B%92%E5%90%A6-denial-of-service/"
---

# サービス拒否（denial of service）

セキュリティ攻撃方法の一つ。サービスできない正当なリクエストなどを大量に送りつけてシステムを過負荷状態にする。

## Present in syllabi


- Advanced Technical Test Analyst 2012
- Advanced Security Tester 2016
- Foundation Extension - Performance Testing 2018
- Advanced Technical Test Analyst 2019

## Translations


- [English](https://istqb-glossary.page/denial-of-service/) — denial of service
- [Deutsch](https://istqb-glossary.page/de/dienstblockade/) — Dienstblockade
- [Italiano](https://istqb-glossary.page/it/denial-of-service/) — denial of service
- [Português (Brasil)](https://istqb-glossary.page/br/denial-of-service/) — denial of service
- [Polski](https://istqb-glossary.page/pl/blokada-us%C5%82ug/) — blokada usług
- [Português](https://istqb-glossary.page/pt/negacao-de-servico/) — negação de serviço
- [Čeština](https://istqb-glossary.page/cz/odepreni-sluzeb-dos/) — odepření služeb (DOS)
- [Svenska](https://istqb-glossary.page/se/denial-of-service/) — denial of service
- [Svenska](https://istqb-glossary.page/se/fornekande-av-tjansten/) — förnekande av tjänsten
- [Norsk](https://istqb-glossary.page/no/dos-angrep/) — DoS angrep
- [Norsk](https://istqb-glossary.page/no/tjenestenektangrep/) — tjenestenektangrep

Read this term online: https://istqb-glossary.page/jp/%E3%82%B5%E3%83%BC%E3%83%92%E3%82%B9%E6%8B%92%E5%90%A6-denial-of-service/

Markdown variant of the HTML page at https://istqb-glossary.page/jp/%E3%82%B5%E3%83%BC%E3%83%92%E3%82%B9%E6%8B%92%E5%90%A6-denial-of-service/ — part of the
ISTQB Glossary (https://istqb-glossary.page), a linkable, machine-readable
republication of the ISTQB glossary under fair use. No affiliation with ISTQB.