本議程將分享利用學校 DNS server 增進網路安全的實務經驗、包含 query log 跟 DNS sinkhole，並詳盡介紹其原理和架設過程。從蒐集資料開始，分析資料，推測原因，利用有限的資源及權限，制定相關對策，並帶入實作過程。在這段摸索的過程中，我學到了不少全新的知識，也發生許多有趣的事，希望能藉此機會將這些經驗與大家分享。先備知識
無
SITCON 2020 共筆 SITCON 2020 2020 共筆 R1歡迎大家來到SITCON 2020 ヽ(✿ﾟ▽ﾟ)ノ
共筆入口：https://hackmd.io/@SITCON/2020
手機版請點選上方 按鈕展開議程列表。
請從這裡開始
computer -> dns -> cache
遞迴查詢：www.hsnu.tw
.tw ->root
.tw DNS ->hsnu.tw
www.hsnu.tw -> hsnu.tw DNS
學校免費的電腦
猜測原因：53 port?
computer -> DNS
root
.com DNS
Malware
Query Log
rndc status
query is off
rndc querylog
named.log
不要拿youtube做測試，我讓全校兩三天不能看youtube
(優質學長的作為)
可以幹別人的就幹別人的
or
or
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| 19^th^ | 19th | ||
| H~2~O | H2O | ||
| ++Inserted text++ | Inserted text | ||
| ==Marked text== | Marked text | ||
| [link text](https:// "title") | Link | ||
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在筆記中貼入程式碼 | |
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| {%youtube youtube_id %} | Externals | ||
| $L^aT_eX$ | LaTeX | ||
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