NAT & NAPT - Mooneey/Facebook_Crawling GitHub Wiki

  1. ๊ฐœ์š”
  • private IP ์ฃผ์†Œ์™€ global IP ์ฃผ์†Œ๋ฅผ ๋ณ€ํ™˜ํ•˜์—ฌ private IP ์ฃผ์†Œ๊ฐ€ ํ• ๋‹น๋œ ์ปดํ“จํ„ฐ์— ๋Œ€ํ•ด ์ธํ„ฐ๋„ท ์•ก์„ธ์Šค๋ฅผ ๊ฐ€๋Šฅํ•˜๊ฒŒ ํ•  ๋•Œ ์‚ฌ์šฉํ•˜๋Š” ๊ธฐ์ˆ ๋กœ๋Š” NAT์™€ NAPT๊ฐ€ ์žˆ์Šต๋‹ˆ๋‹ค.
  1. NAT(Network Address Translation)

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  • private IP ์ฃผ์†Œ๊ฐ€ ํ• ๋‹น๋œ client๊ฐ€ ์ธํ„ฐ๋„ท์ƒ์— ์žˆ๋Š” ์„œ๋ฒ„์— ์•ก์„ธ์Šค ํ•  ๋•Œ NAT ๋ผ์šฐํ„ฐ๋Š” client์˜ private IP๋ฅผ NAT๊ฐ€ ๊ฐ€์ง€๊ณ  ์žˆ๋Š” global IP๋กœ ๋ณ€ํ™˜ํ•˜์—ฌ ์š”์ฒญ์„ ์†ก์‹ ํ•ฉ๋‹ˆ๋‹ค.

  • ์‘๋‹ต์€ NAT ๋ผ์šฐํ„ฐ๊ฐ€ ์†ก์‹ ์ฒ˜์˜ client์˜ private IP ์ฃผ์†Œ๋กœ ๋ณ€ํ™˜ํ•˜์—ฌ ์†ก์‹ ํ•ฉ๋‹ˆ๋‹ค.

  1. NAPT(Network Address Port Translation)

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  • private IP์™€ ํ•จ๊ป˜ port๋„ ๊ฐ™์ด ๋ณ€ํ™˜ํ•˜๋Š” ๊ธฐ์ˆ ์ž…๋‹ˆ๋‹ค.

  • private IP๋ฅผ global IP๋กœ ๋ณ€ํ™˜ํ•  ๋•Œ private IP๋ณ„๋กœ ์„œ๋กœ ๋‹ค๋ฅธ port๋กœ ๋ณ€ํ™˜ํ•ฉ๋‹ˆ๋‹ค.

  • Linux์—์„œ NAPT๋ฅผ ๊ตฌ์ถ•ํ•˜๋Š” ๊ฒƒ์„ IP ๋งˆ์Šค์ปค๋ ˆ์ด๋“œ๋ผ๊ณ  ๋ถ€๋ฆ…๋‹ˆ๋‹ค.