IP 317 318 IP 319 322 327 332 335 337 339 339 340 342 DNS ProxyDNS 344 DNS 344 DNS 348 DNS 349 DNS 350 DHCP 352
DHCP 353 DHCP 355 NAT 35 NAT 359 30 34 ID 38 371 374 CBCP 375 CBCP 377 379 380 TA 382 URL URL 394 39 398 E 399 400 402 405 408 TEL 411 414 415 418 419
IP IP IP ProxyDNS ProxyDNS IP NAT NAT P.35 IP 317
2 LAN 2 2 LAN ISDN LAN LAN IP LAN 318 IP
IP IP IP TCP IP UDP TCP ICMP IP UDP TCP ICMP PING IP TCP TCP TCP TCP TCP TCP TCP IP 319
2 TCP TCP SYN ACK 2 TCP SYN ACK TCP 1 0 1 1 0 1 SYN=1 ACK=0 TCP IP IP TCP/IP telnet 23 IP IP IP IP P.01 320 IP
NAT IP IP IP IP NAT NAT IP 2 A. B. A B IP 321
2 TCP TCP TCP TCP LAN FTP WWW FTP DNS ftp DNS DNS DNS ftp DNS FTP DNS DNS ftp-data 322 IP
LAN 192.18.1.0/24 FTP LAN 192.18.1.0/24 WAN DNS FTP 1 192.18.1.0/24 FTP 21 ftp TCP 2 1 DNS 1 192.18.1.0/24 DNS 53 domain UDP 2 1 1 passive IP 323
2 FTP 21 TCP LAN 1. 2. 3. IP IP 4. IP tcp IP 192.18.1.0 24 IP 21 ftp TCP 5. 324 IP
FTP LAN. 3. 5. IP tcp IP 21 ftp IP 192.18.1.0 24 TCP DNS 53 UDP LAN 7. 3. 5. IP udp IP 192.18.1.0 24 IP 53 domain TCP IP 325
2 DNS LAN 8. 3. 5. IP udp IP 53 domain IP 192.18.1.0 24 TCP 9. 3. 5. IP IP IP TCP 10. 11. 12. 32 IP
LAN WWW LAN LAN WWW LAN 192.18.1.2/32 WWW LAN 192.18.1.3/32 WWW LAN 192.18.1.0/24 WAN DNS LAN WWW 1 192.18.1.2/32 80 www-http 2 1 WWW 1 192.18.1.3/32 WWW 80 www-http 2 1 DNS 1 192.18.1.0/24 DNS 53 domain UDP 2 1 1 IP 327
2 LAN 80 LAN 1. 2. 3. IP IP 4. IP tcp IP IP 192.18.1.2 32 TCP 5. 80 WWW-http 328 IP
LAN LAN. 3. 5. IP tcp IP 192.18.1.2 32 80 WWW-http IP TCP WWW 80 LAN 7. 3. 5. IP tcp IP 192.18.1.3 32 IP 80 WWW-http TCP IP 329
2 WWW LAN 8. 3. 5. IP tcp IP 80 www-http IP 192.18.1.3 32 TCP DNS 53 UDP LAN 9. 3. 5. IP udp IP 192.18.1.0 24 IP 53 domain TCP 330 IP
DNS LAN 10. 3. 5. IP udp IP 53 domain IP 192.18.1.0 24 TCP 11. 3. 5. IP IP IP TCP 12. 13. 14. IP 331
2 LAN NetBIOS 137 139 NetBIOS 137 139 1 137 139 2 137 139 Windows TCP NetBIOS 137 139 332 IP
137 139 1. 2. 3. IP IP 4. IP IP IP 137-139 TCP 5. IP 333
2 137 139. 3. 5. IP IP 137-139 IP TCP 7. 8. 9. 334 IP
LAN 192.18.1.0/24 100.100.100.100 1 192.18.1.0/24 100.100.100.100 IP 335
2 100.100.100.100 LAN 1. 2. 3. IP IP 4. IP IP 192.18.1.0 24 IP 100.100.100.100 32 TCP 5.. 7. 8. 33 IP
PING ICMP PING ICMP IP DNS PING PING 1 ICMP IP 337
2 ICMP 1. 2. 3. IP IP 4. IP icmp IP IP TCP 5.. 7. 8. 338 IP
3 IP P.11 339
2 WWW A WWW B A A mailhost.provider.or.jp WWW B ProxyDNS DNS ProxyDNS P.344 340
internet A ISP-A B ISP-B 1. 2. internet 3. ISP-A 4. 5. POP3 mailhost.provider.or.jp. 7. 8. 9. 10. DNS ISP-B 341
2 2 A B A 2,000 900 10 3 901 B 970 00 10 01 1 20 1,200 A 2,000 A 1,000 A 970 B 3,970 B 2,000 A 970 B,000 B 8,970 A 900 B 300 2,000 A 970 B 0 2,970 2,970 900 A ISP-A 901 B ISP-B internet A ISP-A B ISP-B 1. 2. internet 342
3. ISP-A 1 1 1 4. 4. ISP-A 5. 15. 7. 8. 9. 900 343
2 DNS ProxyDNS ProxyDNS DNS DNS DNS DNS DNS DNS IP ProxyDNS DNS ProxyDNS DNS 344 DNS ProxyDNS
ProxyDNS 172.1.0.0/1 kaisya.kaisya.co.jp internet ProxyDNS 1. ProxyDNS ProxyDNS 2. ProxyDNS 3..kaisya.co.jp DNS kaisya 4. ProxyDNS 5. ProxyDNS DNS ProxyDNS 345
2. IP 172.1.0.0 1 255.255.0.0 DNS kaisya 7. ProxyDNS internet ProxyDNS 8. 2. 4. ProxyDNS DNS internet 9. 5. 7. ProxyDNS IP 0 0.0.0.0 DNS internet 10. ISDN DNS ProxyDNS ISDN P.9 34 DNS ProxyDNS
Windows 98 1. 2. 3. TCP/IP 4. TCP/IP DNS 5. DNS. DNS IP 7. OK 8. DHCP ISDN DNS ProxyDNS DNS IP ProxyDNS DHCP DHCP DNS IP IP ProxyDNS DNS ProxyDNS 347
2 DNS ProxyDNS DNS DNS DNS RFC1877 1. ProxyDNS ProxyDNS 2. ProxyDNS 3. DNS DNS 4. ProxyDNS 5. DNS 348 DNS ProxyDNS
DNS DNS QTYPE Windows 2000 DNS SOA SRV 33 ISDN P.9 ProxyDNS A 1 DNS SOA DNS 1. ProxyDNS ProxyDNS 2. ProxyDNS 3. SOA DNS ProxyDNS 349
2 4. ProxyDNS 5. DNS DNS IP DNS ProxyDNS DNS LAN LAN DNS 1. 2. 350 DNS ProxyDNS
3. IP IP DHCP DNS 4. 5. DNS DNS ProxyDNS 351
2 DHCP DHCP IP IP DHCP IP DHCP IP IP DNS IP DHCP IP IP IP IP MAC DHCP IP DHCP DHCP IP MAC MAC LAN IP NAT IP DHCP DHCP 352 DHCP
DHCP DHCP IP 192.18.1.1 DHCP IP 192.18.1.2 192.18.1.33 IP 32 LAN / 192.18.1.0/24 1. LAN LAN 2. IP IP 192.18.1.1 LAN IP 24 + 1 DHCP 353
2 DHCP DHCP IP 192.18.1.2 32 DHCP 32 3. 4. 354 DHCP
DHCP DHCP DHCP LAN / 192.18.1.0/24 IP MAC 00:00:0e:12:34:5 IP 192.18.1.2 LAN DHCP DHCP 1. 2. 3. IP 192.18.1.2 MAC 00:00:0e:12:34:5 DHCP DNS 4. 5. DHCP 32 DHCP 355
2 NAT NAT NAT LAN NAT 1 LAN 35 NAT
IP InterNIC IP LAN WAN LAN IP LAN NAT LAN NAT NAT NAT 2 NAT NAT NAT NAT NAT NAT IP NAT 357
2 NAT NAT 1 1 NAT NAT NAT LAN Web NAT IP 358 NAT
NAT NAT NAT NAT 1 NAT NAT WWW FTP IP NAT 359
2 NAT ISDN LAN 10.10.10.9/29 WWW FTP IP 10.10.10.100 03-1234-578 ID userid userpass / 192.18.1.0/24 192.18.1.255 0 9 A Z a z < > & P.00 30 NAT
1. ISDN ISDN 2. 03-1234-578 ID userid userpass 3. 1. 2. 3. NAT NAT NAT 10.10.10.100 3 NAT NAT ftp DNS NAT NAT NAT 31
2 4. NAT OK NAT 5. IP IP 192.18.1.2 IP www,http IP 10.10.10.98 www,http NAT NAT NAT IP NAT IP. 7. 4.. IP IP 192.18.1.3 ftp IP IP 10.10.10.99 ftp 8. 9. 10. 32 NAT
NAT NAT NAT IP 25 32 NAT NAT 33
2 ISDN +TA ISDN +ISDN ISDN +PIAFS +PHS PHS ISDN ISDN TA&PHS P.125 LAN PHS ID mobile mobilepass PHS TA ID soho sohopass 34
LAN / 192.18.1.0/24 IP 192.18.1.34 192.18.1.35 ID 1. 2. ISDN ISDN 3. 35
2 1. 2. 3. 192.18.1.34 2 4. 1. 2. PAP CHAP MP 3. 3
1. 2. ID PPP 3. ID mobile mobilepass 4. 5. 2. 4. < TA> ID soho sohopass. 7. 37
2 ID PPP ID ID ID ISDN 2 ID kawasaki kawapass PAP/CHAP MP 38 ID
kaisya kawasaki LAN ISDN P.104 1. 2. ISDN 3. 1. 2. PAP CHAP MP 3. ID 39
2 1. 2. kaisya 3. kawasaki 4. ID kawasaki kawapass 5.. 7. 8. 370 ID
Wakeup on LAN OFF PHS Wakeup on LAN AMD OFF Magic Packet Wakeup on LAN OFF OFF Wakeup on LAN Wakeup on LAN ISDN PHS 371
2 1. 2. 3. MAC MAC Wake-up-ID 19 Wake-up-ID ISDN Wake-up-ID Wake-up-ID Magic Packet Wake-up-ID DHCP DNS MAC P.31 4. 5. 372
1. ISDN 2. Wake-up-ID Magic Packet Magic Packet OS 373
2 2 CBCP Windows 95/98/2000/Me Windows NT 3.51/4.0 ISDN ID ISDN NTT 374
Microsoft CBCP CBCP 4Kbps 4Kbps 32Kbps 32Kbps 1 CBCP 2 CBCP 3 4 CBCP CBCP 03-3333-3333 0 kaisya office LAN P.120 375
2 1. 2. kaisya 3. office 4. CBCP 0 03-3333-3333 :0 5.. 7. 8. 37
CBCP < PHS> +PHS CBCP 10 outside PHS TA&PHS P.125 1. 2. outside 3. PHS 377
2 4. CBCP 10 070-1234-578 :10 5.. 7. 8. P.34 378
ISDN 2 0 kaisya tokyo LAN ISDN P.104 1. 2. kaisya 3. tokyo 379
2 4. 0 5.. 7. 8. ISDN 2 10 380
kaisya kawasaki LAN ISDN P.104 1. 2. kaisya 3. kawasaki 4. 10 5.. 7. 8. 381
2 TA TA TA LAN TA TA NAT NAT TA Windows 95 98 2000 VPN RS232C TA PPP OS Windows 95 98 2000 Windows 95 Microsoft Windows 95 1.3 TA MP TA DNS TA 2 B 1 1 TA 1 TA TA 382 TA
ISDN IP 192.18.1.2 03-1111-1111 IP 192.18.2.1 5 ID user1 userpass TA 1. TA TA 2. TA 1 IP 192.18.1.2 32 5 3. 4. TA 383
2 VPN Windows 95 98 Windows 95 Microsoft Windows 95 1.3 Windows Web 1. 2. Windows 384 TA
3. OK 4. OK Windows 95 98 1. Windows 2. 3. 4. ISP Microsoft VPN Adapter TA 385
2 5.. IP 192.18.1.1 03-1111-1111 IP 7. 8. ISP 38 TA
9. ISP 10. 11. TCP/IP 12. TCP/IP TA 387
2 13. IP IP 14. OK 15. ISP OK 388 TA
TA Windows 95 98 1. Windows 2. ISP 3. user1 userpass 4. 5. TA 389
2 Windows 2000 1. 2. 3. 4. 5. 7.. 390 TA
7. IP 192.18.1.1 03-1111-1111 IP 8. 9. 10. TA 391
2 11. 12. 13. 14. OK 15. 392 TA
TA Windows 2000 1. 2. 3. user1 userpass 4. 5. TA 393
2 URL URL URL URL URL ProxyDNS www.danger.ne.jp URL 1. URL ProxyDNS 2. ProxyDNS 394 URL URL
3. www.danger.ne.jp 4. ProxyDNS 5. www.danger.ne.jp XXX.danger.ne.jp URL.danger.ne.jp ProxyDNS URL URL 395
2 ISDN 3 10 3 10 0 3 1 3,000 39
internet A ISP-A 0 08:00 19:00 19:00 23:00 180 180 23:00 08:00 240 1. 2. internet 3. 4. 0 180 180 240 5.. 7. 8. 397
2 50 10,000 1. 2. ISDN 50 10,000 3. 4. INS 4 - INS - NTT DoCoMo - PHS PIAFS 398
E E TEL 0 9 A Z a z < > & P.00 E E 399
2 CHECK 1 2 10 3 POP pop.server.ne.jp user1 himitu 1. E E 2. 400 E
3. user1 himitu POP3 pop.server.ne.jp 10:00 15:00 4. E 5.. / / P.434 E 401
2 PHS PHS PHS ID 1234 pop.server.ne.jp user1 himitu CHECK P.405 P.408 402 E
1. E E 2. 3. user1 himitu POP3 pop.server.ne.jp ID 1234 ID 4. E 5.. E 403
2 PHS ISDN ID 03-1111-1111 1234 P.434 404 E
1 2 10 3 friend@mail.ne.jp user2@mail.ne.jp POP pop.server.ne.jp SMTP smtp.server.ne.jp user1 himitu user1 P.400 P.402 E 405
2 1. E E 2. user1 3. / / SMTP smtp.server.ne.jp 4. OK 5. user2@mail.ne.jp. 40 E
7. 8. OK 9. friend@mail.ne.jp 10. 11. E 12. 13. E 407
2 1 2 10 3 POP pop.server.ne.jp SMTP smtp.server.ne.jp user1 himitu user2@mail.ne.jp user1 P.400 P.402 408 E
1. E E 2. user1 3. / / SMTP smtp.server.ne.jp 1 PHS 1 4. OK E 409
2 5. user2@mail.ne.jp. 7. E 8. 9. From: Si-R <user1@smtp.server.ne.jp> 1 Subject: Mail list user1 01. 02/29 10:00 : girl@mail.ne.jp 2 : Hello 1: < > 2: 410 E
TEL TEL TEL TEL TEL TEL 1 TEL TEL 2 TEL TEL 3 1 2 3 TEL 1 2 3 TEL E 411
2 1 1 user2@mail.ne.jp tel1@si-r30 smtp.server.ne.jp 1. E E 2. TEL TEL 3. 1 OK [TEL ] 4. 1 user2@mail.ne.jp tel1@si-r30 SMTP smtp.server.ne.jp POP 1 412 E
5. E. 7. TEL From: Si-R <tel1@si-r30> Subject: TEL1 Mail 01. 02/29 10:00 0311112222 031234578 E 413
2 CHECK A NTT 1. E E 2. ISDN 3. 4. TA TA ISDN 414 E
1 11 INS NTT NTT 0 9 A Z a z < > & P.00 1. 2. 415
2 3. 23 00 08:00 4. 5. 2002 1 1 0-123-457 0-123-457 1. 2. 41
3. 2002 1 1 2 00 1 0-123-457 1 0-123-457 4. 5. 417
2 OFF ON P.405 P.408 TEL P.411 P.2 P.313 ON OFF - - - ON/OFF P.428 P.307 P.415 418
TEL 1. 2. TEL 3. 4. 419
2 420