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(VPN)

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2008

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2. VPNVPN dialup -, , 1.

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IPSec 3 , L2TP.

IPSec . VPN , L2TP IPSec VPN IPSec . , IPSec IP L2TP IPX IP .

VPN , L2Tp PPTP IPSec-IPSec . VPN .

. VPN , dialup .

Microsoft-Windows 95,Windows 98,Windows NT Windows 2000- VPN , .Windows 9x Windows NT PPTP, Windows 2000 PPTP L2TP.Linux IPSec PPTP. PPT Secure Shell(SSH), RSA .

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Hypertext Markur Language(HTML)-

Web . , .

Extensible Markur Language(XML) Commerce XML (cXML).- HTML, .

Open Buying on the Internet (OBI)- (e-commerce).

VPN VPN VPN -. -. VPN IP (forwarding).

LAN . (dial on demand) . , , dialup . , . - ISP VPN. , VPN , .VPN

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, . : Point-to-Point Tunneling Protocol (PPTP)

Layer 2 Forwarding (L2F)

Layer 2 Tunneling Protocol (L2TP)

IPSec

Secure Shell (SSH) Secure Shell 2 (SSH2)

Crypto IP Encapsulation (CIPE)

PPTPPPTP Microsoft , PPP, WAN . :

1- PPTP PPP , IP,IPX NetBEUI , Generic Routing ncapsulation (GRE) . IP IP . VPN , VPN .2- , . VPN Microsoft MPPE PPTP .

PPTP-Linux , Linux UNIX . PPTP . PPTP ( PoPTop) Linux,Sun Solaris,FreeBSD UNIX. Windows , PPTP-Linux .Macintosh Windows PPTP , Network Telesystems TunnelBuilder.Cisco L2F 1996. IOS. PPTP, L2F Frame Relay ., PPTP IP, , L2F . L2F .

L2FPMicrosoft Cisco PPTP L2F L2TP. L2TP IP, PPTP. L2FTP ,Frame Relay X.25. WAN IP. L2TP . , (QoS)

L2TP , .

L2TP, PPTP, .

L2TP -IP , ATM Frame Relay .

IPSec , , , L2TP. , . IPSec IP .IPSec : Authentication Header (A) Encapsulating Security Payload (ESP). . , , . , , . . , .ESP . , () IP . DES 3DES.

SSH/SSH2

SSH UNIX r , rsh,rlogin rcp. SSH .SSH2 , , VPN , linux UNIX. VPN , SSH2, VPN .SSH Windows.

CIPECIPE Linux, IP . OSI . . , , VPN. CIPE - - IPSec. . , , . , , : MPPE

IPSec VPNd SSH MPPE PPTP- VPN ( PPP dialup ) 40,56 128 .128 ( ) .

IPSec DES 3DES L2TP .

- . - .VPNd linux Blowfish. 64- , - 32 448 . : . , GOLDFISH,DOSFISH TWOFISH.UNIX SSH .

VPN.

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VPN , VPN . .

, Extensible Authentication Protocol (EAP) Challnge Handshake Authentication Protocol (PAP) Shiva PAP (SPAP). , VPN, ,

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VPN , - .

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"VPN fix" 0,03 / , 0,11 ./.!

"VPN fix"?

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IP VPN - , outsourcing . LAN-to-LAN . 100% . , . : ( Voice Video) ( Interactive data, Business data Standard data).

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(BGP4, OSPF)

gateway VPN ;

, Voice gateway, on-net calls

Dial back-up, ISDN back-up .

IPSec VPN

SSL

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