TEXT
·͓͖͑
▸ Postfix ͱ
▸ MTA mail transfer agent
▸ smtpd αʔόʔͰϝʔϧΛड͚औͬͯ
▸ smtp ΫϥΠΞϯτͰྡͷ MTA ʹϝʔϧΛసૹ
▸ TLS ͱ
▸ ௨৴ͷ҉߸Խ Transport Layer Security
▸ ࠓճ ྡͷMTA͘͠ϝʔϥʔ ͔Β smtpd αʔόʔ ·ͰͱɺsmtpΫϥΠ
Ξϯτ ͔Β ྡͷsmtpdαʔόʔ ͕ؒ TLS (҉߸)Խର
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ࠔͬͨ͜ͱ 1/4
▸ ͕ࣗ postfix ϝʔϧηΩϡϦςΟ Α͘Βͳ͍
▸ ͳΜͰͦΜͳਓؒΛϝΠϯͰΞαΠϯʁ
▸ શʹձ͔ࣾΒແৼΓ͞Εͨײ…Ͱ
▸ Ғ͍ਓʮࣄલௐࠪ(?)ऴΘͬͯΔ͔Βେৎʯ
w w w w w w w w w w w w w w w
▸ ࢲʮྑ͔ͬͨɻָͳࣄʹͳΓͦ͏ͩͳɻɻʯ
▸ ࢲʮͰɺݱঢ়ͷ֬ೝΛͯ͠ΈΑ͏͔ɻʯ
TEXT
ࠔͬͨ͜ͱ 4/4
▸ ΤΠδϯάظ͕ؒͳ͍ɻɻ
▸ TLS Ωϟογϡ DB ͕ංେԽ͢Δ͕݅͋;
ɻɻ
▸ ͷͪʹ RFC5077 ͷଘࡏΛΔ࣌͢Ͱʹ͠
▸ TLS1.2 ಉ࢜ͳΒ૿͑ͳ͍͕ɺSSLv3 ͱ௨৴͢Δͱ૿͑
ΔͬΆ͍ʁ
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RFC5077 ͱʁ
▸ Transport Layer Security (TLS) Session Resumption without Server-Side State
▸ https://tools.ietf.org/html/rfc5077
▸ ৄ͘͠ https://techblog.yahoo.co.jp/infrastructure/ssl-session-
resumption/