๐ŸŒ‰ ์ธํ„ฐํŽ˜์ด์Šค ๋ณด์•ˆ ์•”ํ˜ธํ™” ํ”„๋กœํ† ์ฝœ(PPTP, L2TP, SSL, S-HTTP) | ๐Ÿš€์ •์ฒ˜๊ธฐ ์‹ค๊ธฐ ๋Œ€๋น„ ๋ฌธ์ œ ํฌํ•จ

์ •์ฒ˜๊ธฐ์ธํ„ฐํŽ˜์ด์Šค๋ณด์•ˆํ”„๋กœํ† ์ฝœ์•”ํ˜ธํ™”๋„คํŠธ์›Œํฌ๋ณด์•ˆ
์ฝ๋Š”๋ฐ ์•ฝ 6๋ถ„ ์ •๋„ ์†Œ์š”
์ฒ˜์Œ ์“ฐ์—ฌ์ง„ ๋‚ : 2025-07-12
๋งˆ์ง€๋ง‰์œผ๋กœ ๊ณ ์ณ์ง„ ๋‚ : 2025-07-12
์ด ๊ธ€์„ ๋ณด๋Ÿฌ์˜จ ํšŸ์ˆ˜: 57

์š”์•ฝ

์ •๋ณด์ฒ˜๋ฆฌ๊ธฐ์‚ฌ ์‹ค๊ธฐ ์‹œํ—˜์˜ ์ธํ„ฐํŽ˜์ด์Šค ๋ณด์•ˆ ํŒŒํŠธ์—์„œ ๋‹ค๋ฃจ๋Š” ๋‹ค์–‘ํ•œ ๋ฐ์ดํ„ฐ ์•”ํ˜ธํ™” ์ „์†ก ํ”„๋กœํ† ์ฝœ(PPTP, L2TP, IPSec, SSL/TLS, S-HTTP)์˜ ํ•ต์‹ฌ ๊ฐœ๋…๊ณผ ํŠน์ง•์„ ์ •๋ฆฌํ•˜๊ณ , ์‹ค๊ธฐ ๋Œ€๋น„ ๋ฌธ์ œ๋กœ ๋งˆ๋ฌด๋ฆฌํ•ฉ๋‹ˆ๋‹ค.

๐Ÿ’ก ์ธํ„ฐํŽ˜์ด์Šค ๋ณด์•ˆ ํ”„๋กœํ† ์ฝœ์€ ์ •์ฒ˜๊ธฐ ์‹ค๊ธฐ ์‹œํ—˜์—์„œ ์ธํ„ฐํŽ˜์ด์Šค ๊ตฌํ˜„ ๊ฒ€์ฆ ํŒŒํŠธ์˜ ํ•ต์‹ฌ ์ฃผ์ œ์ž…๋‹ˆ๋‹ค. ๊ฐ ํ”„๋กœํ† ์ฝœ์˜ ๋™์ž‘ ๊ณ„์ธต๊ณผ ํŠน์ง•์„ ๋ช…ํ™•ํžˆ ์ดํ•ดํ•˜๊ณ  ์•”๊ธฐํ•˜๋Š” ๊ฒƒ์ด ์ค‘์š”ํ•ฉ๋‹ˆ๋‹ค. ์ด ํฌ์ŠคํŠธ๋กœ ์™„๋ฒฝํ•˜๊ฒŒ ์ •๋ฆฌํ•ด ๋ณด์„ธ์š”!

์ธํ„ฐํŽ˜์ด์Šค ๋ณด์•ˆ ํ”„๋กœํ† ์ฝœ ์š”์•ฝํ‘œ

์ข…๋ฅ˜ํ”„๋กœํ† ์ฝœ๋™์ž‘ ๊ณ„์ธตํ‚ค์›Œ๋“œ
ํ„ฐ๋„๋ง(VPN)PPTP๋ฐ์ดํ„ฐ ๋งํฌ ๊ณ„์ธตPPP ๊ธฐ์ดˆ
L2F๋ฐ์ดํ„ฐ ๋งํฌ ๊ณ„์ธต์‹œ์Šค์ฝ” ๊ฐœ๋ฐœ, UDP ์‚ฌ์šฉ
L2TP๋ฐ์ดํ„ฐ ๋งํฌ ๊ณ„์ธตํ„ฐ๋„๋ง๋งŒ ์ œ๊ณต, ์•”ํ˜ธํ™”๋Š” IPSec๊ณผ ๊ฒฐํ•ฉ
IPSec๋„คํŠธ์›Œํฌ ๊ณ„์ธตIP ํŒจํ‚ท ๋‹จ์œ„ ์•”ํ˜ธํ™”, ๊ฐ•๋ ฅํ•œ ๋ณด์•ˆ ์ œ๊ณต
์›น ํŠธ๋ž˜ํ”ฝ ์•”ํ˜ธํ™”SSL/TLS์ „์†ก ๊ณ„์ธต์›น ํ†ต์‹  ์•”ํ˜ธํ™” ํ‘œ์ค€, HTTPS์˜ ๊ธฐ๋ฐ˜
S-HTTP์‘์šฉ ๊ณ„์ธตํด๋ผ์ด์–ธํŠธ ์„œ๋ฒ„ ๊ฐ„ ๋ฉ”์‹œ์ง€ ๋‹จ์œ„ ์•”ํ˜ธํ™”
HTTPS์‘์šฉ ๊ณ„์ธตHTTP over SSL/TLS, ํ†ต์‹  ์ฑ„๋„ ์ „์ฒด ์•”ํ˜ธํ™”

๐Ÿ” ๋ฐ์ดํ„ฐ ์ „์†ก ๊ตฌ๊ฐ„ ์•”ํ˜ธํ™”์˜ ํ•„์š”์„ฑ

์šฐ๋ฆฌ๊ฐ€ ์‚ฌ์šฉํ•˜๋Š” ์• ํ”Œ๋ฆฌ์ผ€์ด์…˜๋“ค์€ ์ˆ˜๋งŽ์€ ์ธํ„ฐํŽ˜์ด์Šค๋ฅผ ํ†ตํ•ด ์„œ๋กœ ๋ฐ์ดํ„ฐ๋ฅผ ์ฃผ๊ณ ๋ฐ›์Šต๋‹ˆ๋‹ค. ์ด๋•Œ ๋ฐ์ดํ„ฐ๊ฐ€ ์•”ํ˜ธํ™”๋˜์ง€ ์•Š์€ ํ‰๋ฌธ(Plain Text) ํ˜•ํƒœ๋กœ ์ „์†ก๋œ๋‹ค๋ฉด, ๊ณต๊ฒฉ์ž๋Š” ์ค‘๊ฐ„์—์„œ ๋ฐ์ดํ„ฐ๋ฅผ ๊ฐ€๋กœ์ฑ„(์Šค๋‹ˆํ•‘, Sniffing ๐Ÿ”—) ๋ฏผ๊ฐํ•œ ์ •๋ณด๋ฅผ ์‰ฝ๊ฒŒ ํƒˆ์ทจํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

์ด๋Ÿฌํ•œ ์œ„ํ˜‘์„ ๋ฐฉ์ง€ํ•˜๊ธฐ ์œ„ํ•ด ๋ฐ์ดํ„ฐ ์ „์†ก ๊ตฌ๊ฐ„์—์„œ ์•”ํ˜ธํ™”๋ฅผ ์ ์šฉํ•˜๋Š” ๊ฒƒ์ด ํ•„์ˆ˜์ ์ด๋ฉฐ, ์ด๋ฅผ ์ง€์›ํ•˜๋Š” ๋‹ค์–‘ํ•œ ํ”„๋กœํ† ์ฝœ์ด ์กด์žฌํ•ฉ๋‹ˆ๋‹ค. ๊ฐ ํ”„๋กœํ† ์ฝœ์˜ ๊ณ„์ธต, ํŠน์ง•, ์žฅ๋‹จ์ ์„ ์ดํ•ดํ•˜๋Š” ๊ฒƒ์ด ์ค‘์š”ํ•ฉ๋‹ˆ๋‹ค.


๐ŸŒ ์ฃผ์š” ์•”ํ˜ธํ™” ์ „์†ก ํ”„๋กœํ† ์ฝœ

ํ„ฐ๋„๋ง ํ”„๋กœํ† ์ฝœ (VPN)

ํ„ฐ๋„๋ง ํ”„๋กœํ† ์ฝœ์€ ์ฃผ๋กœ ๊ฐ€์ƒ ์‚ฌ์„ค๋ง(VPN)์„ ๊ตฌ์ถ•ํ•˜๋Š” ๋ฐ ์‚ฌ์šฉ๋˜๋ฉฐ, ์ธํ„ฐ๋„ท๊ณผ ๊ฐ™์€ ๊ณต์šฉ ๋„คํŠธ์›Œํฌ๋ฅผ ๋งˆ์น˜ ์ „์šฉ์„ ์ฒ˜๋Ÿผ ์•ˆ์ „ํ•˜๊ฒŒ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ๋„๋ก ๋ฐ์ดํ„ฐ ํŒจํ‚ท์„ ์บก์Аํ™”ํ•˜๋Š” ๊ธฐ์ˆ ์ž…๋‹ˆ๋‹ค.

PPTP (Point-to-Point Tunneling Protocol)

PPTP๋Š” ๋งˆ์ดํฌ๋กœ์†Œํ”„ํŠธ๊ฐ€ ๊ฐœ๋ฐœํ•œ ์ดˆ์ฐฝ๊ธฐ VPN ํ”„๋กœํ† ์ฝœ์ž…๋‹ˆ๋‹ค.
  • ๊ณ„์ธต: ๋ฐ์ดํ„ฐ ๋งํฌ ๊ณ„์ธต(2๊ณ„์ธต)์—์„œ ๋™์ž‘ํ•ฉ๋‹ˆ๋‹ค.
  • ํŠน์ง•: ๊ตฌํ˜„์ด ๊ฐ„๋‹จํ•˜๊ณ  ์†๋„๊ฐ€ ๋น ๋ฅด๋‹ค๋Š” ์žฅ์ ์ด ์žˆ์Šต๋‹ˆ๋‹ค.
  • ๋ณด์•ˆ: ํ˜„์žฌ๋Š” ์—ฌ๋Ÿฌ ๋ณด์•ˆ ์ทจ์•ฝ์ ์ด ๋ฐœ๊ฒฌ๋˜์–ด ๊ฑฐ์˜ ์‚ฌ์šฉ๋˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค.

L2F (Layer 2 Forwarding)

L2F๋Š” ์‹œ์Šค์ฝ”(Cisco)์—์„œ ๊ฐœ๋ฐœํ•œ ํ„ฐ๋„๋ง ํ”„๋กœํ† ์ฝœ์ž…๋‹ˆ๋‹ค.
  • ๊ณ„์ธต: PPTP์™€ ๋งˆ์ฐฌ๊ฐ€์ง€๋กœ ๋ฐ์ดํ„ฐ ๋งํฌ ๊ณ„์ธต(2๊ณ„์ธต)์—์„œ ๋™์ž‘ํ•ฉ๋‹ˆ๋‹ค.
  • ํŠน์ง•: PPTP์™€ ์œ ์‚ฌํ•œ ์‹œ๊ธฐ์— ๋“ฑ์žฅํ–ˆ์œผ๋ฉฐ, ์ดํ›„ L2TP๋กœ ๋ฐœ์ „ํ•˜๋ฉด์„œ ์ž์—ฐ์Šค๋Ÿฝ๊ฒŒ ๋Œ€์ฒด๋˜์—ˆ์Šต๋‹ˆ๋‹ค.

L2TP (Layer 2 Tunneling Protocol)

L2TP๋Š” PPTP์™€ L2F์˜ ์žฅ์ ์„ ๊ฒฐํ•ฉํ•œ ํ‘œ์ค€ ํ”„๋กœํ† ์ฝœ์ž…๋‹ˆ๋‹ค.
  • ๊ณ„์ธต: ๋ฐ์ดํ„ฐ ๋งํฌ ๊ณ„์ธต(2๊ณ„์ธต)์—์„œ ๋™์ž‘ํ•ฉ๋‹ˆ๋‹ค.
  • ํ•ต์‹ฌ ํŠน์ง•: ํ„ฐ๋„๋ง ๊ธฐ๋Šฅ๋งŒ ์ œ๊ณตํ•  ๋ฟ, ์ž์ฒด์ ์ธ ์•”ํ˜ธํ™” ๊ธฐ๋Šฅ์€ ์—†์Šต๋‹ˆ๋‹ค. ๋”ฐ๋ผ์„œ ๋ณด์•ˆ์„ ์œ„ํ•ด์„œ๋Š” ๋ฐ˜๋“œ์‹œ ๋‹ค๋ฅธ ์•”ํ˜ธํ™” ํ”„๋กœํ† ์ฝœ๊ณผ ํ•จ๊ป˜ ์‚ฌ์šฉํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.
  • ์กฐํ•ฉ: ์ฃผ๋กœ IPSec๊ณผ ํ•จ๊ป˜ ์‚ฌ์šฉ๋˜์–ด L2TP/IPSec ํ˜•ํƒœ๋กœ ๊ฐ•๋ ฅํ•œ ๋ณด์•ˆ์„ ์ œ๊ณตํ•ฉ๋‹ˆ๋‹ค.

IPSec (Internet Protocol Security)

IPSec์€ ๋„คํŠธ์›Œํฌ ๊ณ„์ธต(3๊ณ„์ธต)์—์„œ IP ํŒจํ‚ท ๋‹จ์œ„๋กœ ์•”ํ˜ธํ™”์™€ ์ธ์ฆ์„ ์ˆ˜ํ–‰ํ•˜๋Š” ํ”„๋กœํ† ์ฝœ์ž…๋‹ˆ๋‹ค.
  • ๊ณ„์ธต: ๋„คํŠธ์›Œํฌ ๊ณ„์ธต(3๊ณ„์ธต)์—์„œ ๋™์ž‘ํ•˜์—ฌ IP ๊ธฐ๋ฐ˜์˜ ๋ชจ๋“  ํ†ต์‹ ์— ๋ณด์•ˆ์„ ์ ์šฉํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
  • ํŠน์ง•: ๊ฐ•๋ ฅํ•œ ๋ณด์•ˆ(๊ธฐ๋ฐ€์„ฑ, ๋ฌด๊ฒฐ์„ฑ, ์ธ์ฆ)์„ ์ œ๊ณตํ•˜๋ฉฐ, L2TP์™€ ๊ฐ™์€ ๋‹ค๋ฅธ ํ”„๋กœํ† ์ฝœ๊ณผ ๊ฒฐํ•ฉํ•˜์—ฌ VPN์„ ๊ตฌํ˜„ํ•˜๋Š” ๋ฐ ํ•ต์‹ฌ์ ์ธ ์—ญํ• ์„ ํ•ฉ๋‹ˆ๋‹ค.
  • ์ƒ์„ธ ์ •๋ณด: IPSec์— ๋Œ€ํ•œ ์ž์„ธํ•œ ๋‚ด์šฉ์€ ๋ณ„๋„์˜ ํฌ์ŠคํŠธ์—์„œ ์‹ฌ๋„ ์žˆ๊ฒŒ ๋‹ค๋ฃจ์—ˆ์œผ๋‹ˆ ์•„๋ž˜ ๋งํฌ๋ฅผ ์ฐธ๊ณ ํ•˜์‹œ๊ธฐ ๋ฐ”๋ž๋‹ˆ๋‹ค. โžก๏ธ IPSec ์ƒ์„ธ ์„ค๋ช…๋ณด๊ธฐ

์›น ํŠธ๋ž˜ํ”ฝ ์•”ํ˜ธํ™” ํ”„๋กœํ† ์ฝœ

์›น ํŠธ๋ž˜ํ”ฝ์„ ์•ˆ์ „ํ•˜๊ฒŒ ๋ณดํ˜ธํ•˜๊ธฐ ์œ„ํ•ด ์‚ฌ์šฉ๋˜๋Š” ํ”„๋กœํ† ์ฝœ๋“ค์ž…๋‹ˆ๋‹ค.

SSL/TLS (Secure Sockets Layer / Transport Layer Security)

SSL/TLS๋Š” ์ „์†ก ๊ณ„์ธต(4๊ณ„์ธต)์—์„œ ๋™์ž‘ํ•˜๋ฉฐ ์›น ํ†ต์‹ ์˜ ํ‘œ์ค€ ์•”ํ˜ธํ™” ํ”„๋กœํ† ์ฝœ์ž…๋‹ˆ๋‹ค.
  • ๊ณ„์ธต: ์ „์†ก ๊ณ„์ธต(4๊ณ„์ธต)๊ณผ ์‘์šฉ ๊ณ„์ธต ์‚ฌ์ด์—์„œ ๋™์ž‘ํ•ฉ๋‹ˆ๋‹ค.
  • ํŠน์ง•:
    • TLS๋Š” SSL์˜ ํ›„์† ๋ฒ„์ „์œผ๋กœ, ํ˜„์žฌ๋Š” TLS๊ฐ€ ํ‘œ์ค€์ž…๋‹ˆ๋‹ค. (SSL 3.0 ์ดํ›„ TLS 1.0๋“ฑ์žฅ)
    • ์„œ๋ฒ„์™€ ํด๋ผ์ด์–ธํŠธ ๊ฐ„์˜ ์ธ์ฆ, ์ „์†ก๋˜๋Š” ๋ฐ์ดํ„ฐ์˜ ์•”ํ˜ธํ™”(๊ธฐ๋ฐ€์„ฑ) ๋ฐ ๋ฌด๊ฒฐ์„ฑ์„ ๋ณด์žฅํ•ฉ๋‹ˆ๋‹ค.
  • ํ•ธ๋“œ์…ฐ์ดํฌ ํ”„๋กœํ† ์ฝœ์„ ํ†ตํ•ด ๋ณด์•ˆ ์„ธ์…˜์„ ์ˆ˜๋ฆฝํ•ฉ๋‹ˆ๋‹ค.
  • ํ™œ์šฉ: HTTPS, FTPS ๋“ฑ ๋‹ค์–‘ํ•œ ์‘์šฉ ๊ณ„์ธต ํ”„๋กœํ† ์ฝœ๊ณผ ๊ฒฐํ•ฉ๋˜์–ด ์‚ฌ์šฉ๋ฉ๋‹ˆ๋‹ค.

S-HTTP (Secure Hypertext Transfer Protocol)

S-HTTP๋Š” ์›น ํŽ˜์ด์ง€(HTTP ๋ฉ”์‹œ์ง€) ๋‹จ์œ„๋กœ ์•”ํ˜ธํ™”๋ฅผ ์ œ๊ณตํ•˜๋Š” ํ”„๋กœํ† ์ฝœ์ž…๋‹ˆ๋‹ค.
  • ๊ณ„์ธต: ์‘์šฉ ๊ณ„์ธต(7๊ณ„์ธต)์—์„œ ๋™์ž‘ํ•ฉ๋‹ˆ๋‹ค.
  • ํŠน์ง•:
    • ํด๋ผ์ด์–ธํŠธ์™€ ์„œ๋ฒ„ ๊ฐ„์˜ ์ „์ฒด ํ†ต์‹  ์ฑ„๋„์„ ์•”ํ˜ธํ™”ํ•˜๋Š” HTTPS์™€ ๋‹ฌ๋ฆฌ, ํŠน์ • ๋ฉ”์‹œ์ง€๋‚˜ ํŒŒ์ผ๋งŒ ์„ ํƒ์ ์œผ๋กœ ์•”ํ˜ธํ™”ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
    • ์œ ์—ฐ์„ฑ์ด ์žˆ์ง€๋งŒ, SSL/TLS ๊ธฐ๋ฐ˜์˜ HTTPS๊ฐ€ ์‹œ์žฅ์„ ์žฅ์•…ํ•˜๋ฉด์„œ ํ˜„์žฌ๋Š” ๊ฑฐ์˜ ์‚ฌ์šฉ๋˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค.

HTTPS (Hypertext Transfer Protocol Secure)

HTTPS๋Š” HTTP์— SSL/TLS ํ”„๋กœํ† ์ฝœ์„ ๊ฒฐํ•ฉํ•˜์—ฌ ํ†ต์‹  ์ „์ฒด๋ฅผ ์•”ํ˜ธํ™”ํ•˜๋Š” ๋ฐฉ์‹์ž…๋‹ˆ๋‹ค.
  • ์ •์˜: HTTP over SSL/TLS
  • ํŠน์ง•:
    • ์›น ์„œ๋ฒ„์™€ ๋ธŒ๋ผ์šฐ์ € ๊ฐ„์˜ ๋ชจ๋“  ํ†ต์‹  ๋‚ด์šฉ์ด ์•”ํ˜ธํ™”๋˜์–ด ์ค‘๊ฐ„์ž ๊ณต๊ฒฉ(Man-in-the-Middle Attack)์„ ๋ฐฉ์ง€ํ•ฉ๋‹ˆ๋‹ค.
    • ๊ธฐ๋ณธ ํฌํŠธ๋กœ 443๋ฒˆ์„ ์‚ฌ์šฉํ•ฉ๋‹ˆ๋‹ค. (HTTP๋Š” 80๋ฒˆ)
    • ์˜ค๋Š˜๋‚  ๋ชจ๋“  ์›น์‚ฌ์ดํŠธ์˜ ํ‘œ์ค€์œผ๋กœ ์ž๋ฆฌ ์žก์•˜์Šต๋‹ˆ๋‹ค.

๐Ÿ“ ์ •์ฒ˜๊ธฐ ์‹ค๊ธฐ ๋Œ€๋น„ ๋ฌธ์ œ

๋ฌธ์ œํ„ฐ๋„๋ง ๊ธฐ๋Šฅ๋งŒ ์ œ๊ณตํ•  ๋ฟ ์ž์ฒด์ ์ธ ์•”ํ˜ธํ™” ๊ธฐ๋Šฅ์ด ์—†์–ด ๋‹ค๋ฅธ ๋ณด์•ˆ ํ”„๋กœํ† ์ฝœ๊ณผ ํ•จ๊ป˜ ์‚ฌ์šฉํ•ด์•ผ ํ•˜๋Š” 2๊ณ„์ธต ํ„ฐ๋„๋ง ํ”„๋กœํ† ์ฝœ์€ ๋ฌด์—‡์ธ๊ฐ€?
๋‹ต๋ณ€
์ •๋‹ต์ •๋‹ต ๋ณด๊ธฐ
๋ฌธ์ œ๋„คํŠธ์›Œํฌ ๊ณ„์ธต(3๊ณ„์ธต)์—์„œ IP ํŒจํ‚ท ๋‹จ์œ„๋กœ ์•”ํ˜ธํ™”์™€ ์ธ์ฆ์„ ์ˆ˜ํ–‰ํ•˜๋Š” ํ”„๋กœํ† ์ฝœ์€ ๋ฌด์—‡์ธ๊ฐ€?
๋‹ต๋ณ€
์ •๋‹ต์ •๋‹ต ๋ณด๊ธฐ
๋ฌธ์ œHTTP์— SSL/TLS๋ฅผ ๊ฒฐํ•ฉํ•˜์—ฌ ์›น ์„œ๋ฒ„์™€ ๋ธŒ๋ผ์šฐ์ € ๊ฐ„์˜ ํ†ต์‹  ์ฑ„๋„ ์ „์ฒด๋ฅผ ์•”ํ˜ธํ™”ํ•˜๋Š” ํ”„๋กœํ† ์ฝœ์€ ๋ฌด์—‡์ธ๊ฐ€?
๋‹ต๋ณ€
์ •๋‹ต์ •๋‹ต ๋ณด๊ธฐ
๋ฌธ์ œL2TP ํ”„๋กœํ† ์ฝœ์ด ๋ณด์•ˆ ๊ฐ•ํ™”๋ฅผ ์œ„ํ•ด ์ผ๋ฐ˜์ ์œผ๋กœ ํ•จ๊ป˜ ์‚ฌ์šฉํ•˜๋Š” ํ”„๋กœํ† ์ฝœ์€ ๋ฌด์—‡์ธ๊ฐ€?
๋‹ต๋ณ€
์ •๋‹ต์ •๋‹ต ๋ณด๊ธฐ

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