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1.1 Softether VPN とは 1.1 SoftEther VPN ?? SoftEther VPN (??????? ??????) ??????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????? ?????? VPN ????????? ?????SoftEther VPN ??????????? VPN ?????????????????????????????? 1.1.1 ?? SoftEther VPN ????SoftEther 1.0? ??????????????????? SoftEther ???????????????????? ??????????????????SoftEther???Windows ???? LAN ???????? HUB ?????????????????? 2 VPN ?????????????????????????????????????????SoftEther???????2003 ???????????? ?????????????????????? SoftEther VPN(?????????????)???SoftEther????????????VPN ?????????SoftEther VPN ???????? ??????????????? SoftEther ?????????????????? 1.1.2 VPN ????????? ?VPN (Virtual Private Network)? ??1998 ???????????????VPN ??????????????????????? ???? IP ?????????????????????????????????????????????????????????????? ??????? VPN ?????????????? ??????????????? VPN ?????????????????????????????VPN ???????? IP ???????????? 2 ???????????????? ??????????????????????????????????????????? ??????????????? LAN ????????????????????????????????????????????????????? TCP/IP ????????????????????????????????????????????????????????????????????????????????? VPN ???????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????? ???????????????????????????????????????????????????????? VPN ????????????VPN ?????????????????????????????????????????????????????????? ?????????????????????????????????? 1-1-2.png ???? VPN ????????? ???????????????????? VPN ??????????????????????? 1 ??????????????????????? ??????????????????????????? IP ?????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????? ??????????????????????????????????????????????? WAN ??????????????????????????? ????????????????? 1-1-3.png ??????????????? ?????????????????????????????????????????????????????????????????HTTP ??????? SSL ?????? HTTPS ???????????????SSH ?????????????????????????????????????????? ????????????????????????????????????????????????? 1-1-4.png ?????????????????????????? ??????????????????????????????????????? WAN ??????????????????????????????????? ?????????????????? ??? VPN ??????????????? IP ??? Ethernet ?????????????????????????????????????????? ????????????????? ???????????????????? VPN ???????????? 1 ?????????????????????????????????????? ???????????? IP ???????????????? IP ?????????????????? IP ??????????????????? IP ??? ????????????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????? ?????? IP ???????????????????????????????????? ??????????????????? IP ?????????????????????????????????????????????????? IP ????? ??????????????????????????? TCP/IP ?????????????????????????????????????????????? ? VPN ????????????????????? IP ?????????????????????????????????????????????????? ???? 1-1-5.png ????????? TCP/IP ?????????????????????????? IP ???????????????????? VPN ?????????????????????????????????????VPN ????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????? ?????????????????????????????????????????????????????????????????????????????? ?????????????????????????????????????????????????????????? VPN ?????????????? VPN ??????????????????????????????????????????? WAN ?????????????????????? 1-1-6.png VPN ?????????????????????????? ?????????????????????????? ?????? VPN ????????????????????????????????????????????????????????????????????? ?????????????????????????????????????????????? ?????????????????????? ADSL ???????????????????????????????????????????????????? ??????????????????????? ????????????????????????? IP ????????????????????????VPN ??????????????????????? ?????????????????????????????????????????????????????????????????????? 1-1-7.png ?????????????????????????? 1.1.3 ??? VPN ???????????? ?????????? VPN ??????????????????????????????1998 ???????????????????? VPN ???? ?????????????????????????????????? VPN ????????????????????????????????????????? • PPTP • L2TP / IPSec • vtun • OpenVPN • SSH ???????? • ????????? VPN ?? ?????????? VPN ????????????????????????????????????????????????????????????????? ?????????????????? ????????????????????? ???????????????????????????NAT (IP ??????)?????????????????????????????????????? ??????????????????IP ???????????????????????????????????????????????????????????? ??????????????????????? (???????) ???????Linux ???????????????????????????????? ?????????? VPN ?????????????????????????????????????????????????????????? VPN ? ?????????????????????????? TCP/IP ???????????????????????????????????????? PPTP ????? VPN ????????? GRE (Generic Routing Encapsulation) ????????????????????????? ?????? L2TP ????? VPN ????????? IPSec ??????????IPSec ??????????????????? ???????????? VPN ?????????????? TCP/IP ??????????????????????????? VPN ???????? ???????????????????????? NAT (IP ??????) ??????????????????????????????? VPN ???? ?????????? ????????? VPN ????????????? VPN ????????????????????? VPN ????????????????????? ????? IP ???????????????????????????????????????????????????????????????????????? ????????? 1-1-8.png ?????? VPN ?????? NAT???????????????????????? VPN ??????????????? ??? VPN ????????????? 3 ?????? (IP ?????) ???????????????? (TCP ?????????????????) ???????????????????????????????????????VPN ?????????????????????? VPN ????????? ???????? ???????????????????????????????????IPX/SPX ??? NetBEUI ??????????????? VPN ??? ??????????????????????????????????????????? VPN ???????????????? 1-1-9.png ??? IP ???????? VPN ?????? IP ??????????????????? IP ????????? ??? VPN ???????????? 3 (IP ???) ????????????????????????? VPN ??????????????????? ???????????????????? 1. VPN ????????????????? VPN ??????????????????????? 2. VPN ?????????????????? IP ????????? 1 ???? VPN ????????VPN ????????????????????? VPN ????????????????????????VPN ? ??????? VPN ???????????????????VPN ???????????????????????????????????????????? ?????????? VPN ??????????????????????????????????????VPN ?????????????????????? ?????????????????????????????????????????????????????????? VPN ??????????????? 2 ???? VPN ???????VPN ??????????????????????????????????????????????VPN ?????? ?????????????????????????????????????????????????????????????????????????????? VPN ?????????????????????????????????VPN ??????????????? VPN ?????? IP ???????? ?? IP ?????????????????????????? ???????? VPN ????????????????? VPN ???????? VPN ????????????? IP ??????????????? ???????????????????????????????????????????????????? 1-1-10.png IP ???????????????????? IP ???? VPN ??????????? ??????????????? ??? VPN ??????????????? VPN ??????????????????????????????????????????????????? ????????????????????????????????????????????????????? ??????? VPN ???????????????????????????????????????????????????????????????????? ??? 1-1-11.png ??????? VPN ?????????? ?????????? VPN ??????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????? ???????? ????????????????? VPN ?????????????????????????????????????????????????????????? ??????????????? VPN ?????????????????????????????????????? Mbps ???? Mbps ????? ?????????????????????????????????????? ??????????? 10Mbps ? 100Mbps ?????????????????????????????????????????????????? ?????????????????????????????????????????? VPN ??????? VPN ???????????????????? ??????????????????????????????? ??? VPN ?????????????? VPN ???????? ??? VPN ???????????????????????????????????????????????????????????????????????? ???????? VPN ???????????????? 1.1.4 SoftEther VPN ???????? SoftEther VPN ???????????????? VPN ???????????????????????????????????????????? VPN ????????? SoftEther VPN ??? SoftEther VPN ?????????????????????????????????????????????????????????????????? ??????????????????????????????????????????? SoftEther VPN ??????????????????????? 2???? Ethernet ????????SoftEther VPN ??????? ??? LAN ?????????? HUB ?????? 3 ?????????????????????????????????????????? TCP/ IP ?????????????SoftEther VPN ????????????????????????????????????????????????? VPN ????????????? SoftEther VPN ?????????????? ?1.4 VPN ????????????????????????10. VPN ?????????? ???????????????? SoftEther VPN ????????????????????????????????????? 1-1-12.png SoftEther VPN ???? Ethernet ?????????????????? Ethernet ??????????????? SoftEther VPN ????? VPN ???????????????? 2 (Ethernet) ? VPN ???????????????????? 3 ?????? VPN ??????????????????????? IP ???????????SoftEther VPN ???????????????? Ethernet ?????????? 1-1-13.png ????? VPN ??????????? VPN ?????? SoftEther VPN ??? 1.1.5 NAT??????????????????????? SoftEther VPN ???VPN Server???VPN Client?????VPN Bridge???????VPN ??????????? ??????????????? VPN ???????? ???? Ethernet ????????? VPN ??????????????????????????????? IP ???????????????? SoftEther VPN ????? Ethernet ????? TCP/IP ?????????????????????? VPN ???????????? ????? ???SoftEther VPN ?? VPN ?????? TCP/IP ??????????????????????????????8888 ?? 443 ? (HTTPS ?) ????????????????????TCP/IP ???????????????? ?3.3 VPN Server ??? ????? ???? VPN ?????? TCP/IP ??????????SoftEther VPN ??????????????????????? VPN ????????? ????????????? NAT????????????????????????? VPN ???????????????? ?????????? NAT????????????????????????????? VPN ????????????????SoftEther
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