标题: redhat共享上网 [打印本页] 作者: ╃無名草╃ 时间: 2004-10-2 13:21 标题: redhat共享上网 一、操作环境： / G4 j% ? W! y7 ~6 \: x6 i/ Q4 I1 n' a% P; q* r. q
机器系统与配置：三台机器的关健部件- Z6 S5 N! ~5 C v& U8 w% v, R
第一台：台式机，双网卡，8139和8029，操作系统RedHat 8.0 4 Z% M+ Q7 M9 r7 p1 W第二台：Toshiba notebook，PC卡。RTL-8139/8139C/8139C+，操作系统RedHat 8.0 4 i; y6 Q+ ?$ x# h7 o T第三台：台式机,8029网卡，操作系统windowme6 @' e0 |0 d, ?* n# D' d( l u
Hub[集线器]：Tp-Link 10M，8口0 ~ R' D5 t- a/ ?: l3 H) m
ADSL，乙太口，非路由。 $ [4 i' o- @4 D# W% K) T2 }6 q" m, o$ y2 j
二、网卡设置如下：( b8 y4 G" _: m$ X! \
在第一台机器的双网卡的接法：把ADSL接在eth0上，把eth1接在HUB上。 % D4 g/ J5 d( V# q$ S' M7 g; ]第一块网卡的ip设置：, h5 m7 S0 J& q, q1 z5 e8 k; N8 O. v
ip地址:192.168.0.14 j! I& u. D5 w/ K+ W6 n, J& _
掩码:255.255.255.0 ( R1 ` E5 Y$ _, h! Z1 z/ F第二块网卡的设置2 j8 r0 u) @( A, S- o8 {0 {& t
ip地址:192.168.0.2! _1 Q T* C' H+ p# b$ Z# ^! E
掩码：255.255.255.0 " g; q& w0 p) E+ Y在这两块网卡中，不要设置网关。+ D0 v; z: R j% l7 U: `
++++++++++++++++++++++++++++++++++++++++ 8 i$ ?( t/ y6 h R; \第二台：Toshiba notebook的网卡设置 7 q( F# n5 e! HIP：192.168.0.6: m9 C. v9 u0 \7 L) h
掩码：255.255.255.0 . @3 d2 D$ T3 i& D网关：192.168.0.1* m! x5 p, t) g$ i) L" W
DNS:设置电信给的，或者下面的也行$ d: G6 H9 y& q. _: C3 F+ j
202.96.134.133 * h3 Q5 G/ K1 k+ Z- t$ Z202.96.168.68 ' r u0 ]$ n3 i6 e4 ` _! s4 B+++++++++++++++++++++++++++++++++++++++++ T8 g6 F, C9 a
第三台机器的网卡设置0 | v. Q- T( M$ E' m
P：192.168.0.82 t4 U4 `) Z P$ L$ R
掩码：255.255.255.0) k3 P; \% |/ r) K* U$ J
网关：192.168.0.1$ E9 R- I5 w4 c& n& v$ i
DNS:设置电信给的，或者下面的也行; E: \/ P, m9 F) i; S
202.96.134.133 2 L+ D9 }" y+ Z) s7 C. B202.96.168.68 2 C4 l+ g" d6 i, G三、设置ppp拔号，9 i4 h$ l A% P% ]* ~( G# A6 x1 w
1]删除原来的ppp的ADSL链接。0 t1 I3 v! c' K! Y5 W
如果redhat-config-network原来已经用 redhat-config-network设置的ppp的ADSL连接拔号，用下面的命令调用删除。% K) P0 L% X% {$ |5 y* K+ M
#redhat-config-network 9 }! l2 H: I$ s/ b + J$ p; q4 N. z: M, l2]在终端上以root权限运行 P/ y& A2 z" U
#adsl-setup0 H4 U' o; u2 p4 C+ J; f' v
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[root@LinuxSir02 root]# adsl-setup9 s( X2 N; z `9 Q5 W, e
5 y+ ?& m, o$ l% ^; L& O7 L" S NWelcome to the ADSL client setup. First, I will run some checks on : Q6 o+ b6 N) l4 y Dyour system to make sure the PPPoE client is installed properly... ' S# B. c; i. Y4 ~: d8 b( A - x! H) ]% L" u1 F+ J( ?2 x7 E* v4 Y. X) r$ u
LOGIN NAME * H: P* r. p$ ? ! g9 Q8 A, V3 v) @5 U" n; FEnter your Login Name (default root): ADSL提供商给的用户名，写在这里 ! k+ ^0 G5 V* b* I! A0 i - Z5 t7 u' q% m4 }& l, yINTERFACE4 g R( r, L/ b& x1 Q6 x0 L# p
& R1 f% e( p3 ?! w7 ^" mEnter the Ethernet interface connected to the ADSL modem 1 i' i3 c8 \+ Z: K: dFor Solaris, this is likely to be something like /dev/hme0./ D) K9 f8 G0 ~6 S9 f6 {9 }9 F3 t
For Linux, it will be ethX, where 'X' is a number. 1 J: J# M& c, V P P. d- n( j(default eth0): eth0这是ADSL通过第一台机器的第一张网卡eth0提供上网2 P0 p6 P. F" r j' d3 P6 p
/ X3 Q4 L4 w2 j& C ! ~; E. A$ K8 T/ Q8 b. {Do you want the link to come up on demand, or stay up continuously?3 R5 x) k8 {& }
If you want it to come up on demand, enter the idle time in seconds 6 W3 H/ ]2 C4 ]( N7 b. |: safter which the link should be dropped. If you want the link to " B$ q5 ]3 j3 F8 E5 ystay up permanently, enter 'no' (two letters, lower-case.)0 E, w5 k6 t* t5 T, {. S
NOTE: Demand-activated links do not interact well with dynamic IP8 N& H8 r0 Y$ e2 R' v Y
addresses. You may have some problems with demand-activated links. - z& @5 T5 [' bEnter the demand value (default no):在这里按一下回车就行了。 - ^! }' `* c; r+ R* y6 v , o0 w! ?% O% l! k: RDNS% x+ E7 i$ I, G% I* ~( W# f1 @2 f
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Please enter the IP address of your ISP's primary DNS server.2 n9 N# U9 B3 n+ ?1 g9 X! A( ~
If your ISP claims that 'the server will provide dynamic DNS addresses',* a0 [; D! a# n6 [
enter 'server' (all lower-case) here.8 E$ V+ ]9 i2 u0 l5 h* ^: P
If you just press enter, I will assume you know what you are . Y/ k6 }* u- e) ndoing and not modify your DNS setup.$ A. N; O( d( D, W# R
Enter the DNS information here: 202.96.134.133这是DSN，最好用你本地电信给的* e( V. i1 n0 l7 u: T9 ?4 `
Please enter the IP address of your ISP's secondary DNS server. ' G6 e2 e/ }' W* p' _) hIf you just press enter, I will assume there is only one DNS server. : X! p# M: }( B$ Z8 {. vEnter the secondary DNS server address here: 202.96.168.68这是第二个DNS，也是电信给的。0 W& v) P1 l% j U6 A: s
7 n' _" y7 X: f! A% T6 I8 JPASSWORD; a$ }/ P2 v9 G9 N5 L
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Please enter your Password:在这里把ADSL提供商给的密码写上7 k4 N. T! d7 E5 A, d: F
Please re-enter your Password:0 Z; e. ^% k, b. w2 A4 r! w
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USERCTRL; o' @2 z" A- k/ b b- q: c) S2 e
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Please enter 'yes' (two letters, lower-case.) if you want to allow$ ~7 {' j/ k/ @- \& Z9 x
normal user to start or stop DSL connection (default yes): yes' s! @! J4 ~. I& z) H- o
/ ], j# ^" b- ?7 TFIREWALLING 0 T1 F, x. k2 l, g M& v$ ~4 Q0 I F: d! V+ z# _% @
Please choose the firewall rules to use. Note that these rules are ' r! x$ I8 T- O/ m8 Svery basic. You are strongly encouraged to use a more sophisticated $ C4 j% H% G5 x6 mfirewall setup; however, these will provide basic security. If you : Q$ i. c1 j% K. \- kare running any servers on your machine, you must choose 'NONE' and0 S7 h' G& a: C$ y1 {: @, X F' {9 A
set up firewalling yourself. Otherwise, the firewall rules will deny 6 H' W1 q; g7 g8 S, caccess to all standard servers like Web, e-mail, ftp, etc. If you. @. W) z( y' O( i$ @$ [, I
are using SSH, the rules will block outgoing SSH connections which/ K+ a# p2 v- L* o' N' @
allocate a privileged source port.& z- f f" p0 N& x8 y6 p
! r$ e& Q$ H9 mThe firewall choices are:' c" n" o- q2 {
0 - NONE: This script will not set any firewall rules. You are responsible " Y, ?7 m* b+ O1 b1 X# jfor ensuring the security of your machine. You are STRONGLY* m. v4 u/ `* J7 n) F
recommended to use some kind of firewall rules. 7 S, C( [( ~; a1 Q {1 - STANDALONE: Appropriate for a basic stand-alone web-surfing workstation8 B, o8 V, F4 T( ^- b
2 - MASQUERADE: Appropriate for a machine acting as an Internet gateway 4 Q: a3 A: w% [% p; m- kfor a LAN 0 q Y% F I, I. m6 }Choose a type of firewall (0-2): 2 / P/ A$ ~- ~' [& ~% }7 t* M6 z& h$ E 9 A4 r; a* H3 h& W- N; d( \Start this connection at boot time0 m/ ?' U, c7 S0 x% D* i/ l9 D
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Do you want to start this connection at boot time? * S$ B! H5 F. w9 E5 l! h( ~Please enter no or yes (default no):yes; M; i( M4 U! N1 Z' b/ C) R
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** Summary of what you entered **% U1 A' O3 q. j+ ~
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Ethernet Interface: eth0 0 N8 Z! z* U( hUser name: ADSL用户名 & P# b& J3 n( b; ?% k9 _1 BActivate-on-demand: No# `2 ]/ @' K& _% e7 w
Primary DNS: 202.96.134.133( R8 J: ^7 Q2 V* k: g8 D5 n h
Secondary DNS: 202.96.168.68& H+ G2 b$ n8 x) O' R/ D
Firewalling: MASQUERADE, y7 I! W& t8 _8 x0 T9 U5 Q
User Control: yes # {# \+ t1 D: M! |& Q0 fAccept these settings and adjust configuration files (y/n)?y c; b* Y; O3 v2 k" r+ l # a& R/ T1 ?0 h1 ?! z" `0 T9 g+ e, U
三、在/etc/rc.d/rc.local中加入如下： & w/ j$ F! L- r3 i 5 A) A' ^! b( o1 y( Becho 1 > /proc/sys/net/ipv4/ip_forward: P' [! r4 o" s8 g9 R: E! ~
iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -o ppp0 -j MASQUERADE ! G; K1 I$ x) Q# C0 S6 I5 W$ D" s/ r! p0 j" r( R9 d
四、重新启动机器。就OK了。这有多简单