Song <Song.bbs@bbs.cynix.com.tw>
wrote in message
news:3cFTXR$6Hs@bbs.cynix.com.tw...
> ¡° ¤Þz¡mthhsieh@bbs.ee.ntu.edu.tw
(©~¤h)¡n¤§»Ê¨¥¡G
> > <²¤>
> > ----------------------------------------------------------------
> > ¤£¦n·N«ä¡A§Ú¥t¥~½Ð±Ð¤@Ó°ÝÃD:
°²³]§Ún³o¼Ë³Wµe§Úªº NAT:
> > ISP
server
> >
|
> >
|
> > ------------------
> >
192.168.1.x (¨Ï¥Î ISP ´£¨Ñªº NAT)
> > local
gateway
> > ------------------
> > |
| |
> > |
| |
> > ------------------
> > 192.168.2.x y z
(local net, ¨Ï¥Î local gateway ´£¨Ñªº NAT)
> > ¤]´N¬O¡A local gateway ¥»¨ªº¹ï¥~ IP ¤w¬O NAT
¤F¡A«h¥¦©³¤UÁÙ¥i¥H¦A
> > ¶}¥t¤@¼h NAT µ¹ local net¡A¨Ï±o local net
ùØÀY¨C¥x¾÷¾¹³£¥i¥H¡uª½±µ¡v
> > ¹ï¥~³s½u¶Ü¡H¤]´N¬O¡A local net ¥i¥Hª½±µ telnet
140.x.x.x, ¦Ó¤£»Ýn
> > ¥ý telnet ¨ì local gateway, ¦A©¹¥~ telnet¡C
>
> §Ú·Q¤º³¡¤£»Ýn¦A¬[¤@¼h NAT¡A´N¬O¤£»Ýn
ip_masq ¡A¥un±N routing
> ³]¦n´N¥i¥H¥Î¤F¡C
>
> ¥H±z¤W±ªº¨Ò¤l¨Ó»¡¡A°²³] local gateway
¹ï¥~¬° 192.168.1.1 eth0¡A
> ¹ï¤º¬° 192.168.2.254 eth1¡A¥un³o¸Ìªº
routing ³]¦n¡A¤º³¡ªº client
> ±N gateway ³]¨ì 192.168.2.254 ´N¦n¤F¡C
>
> ¦Ü©ó¯à§_ª½±µ telnet 140.x.x.x ´N±o¬Ý¬[
NAT ªº¥D¾÷¦p¦ó³]©w¤F¡C
¨S¿ù¡M±q ISP ªº NAT server ¤§«á¨ì 192.168.1.x (x °²³]¬° 252 §a)¨º¥x¥D¾÷¤§¶¡
ªº router ¡M³£¥²¶·¦³ 192.168.2.x ªº¸ô¥Ñ³]©w¡M
¨ä¤Wªº²Ä¤@Ó router (°²³]´N¬O ISP ªº NAT ¦n¤F)¡M¥¦n§â³q·Q
192.168.2.x ªº gw
³]¬° 192.168.1.252¡C
¤£¹L¡M¦A¥Î¤@Ó NAT ¤]¬O¥i¥Hªº¡C