레드햇 알짜 리눅스 6.1에서의 한국통신 ADSL과 IP MASQUERADING을 통한 내부공유방법
 Linux KT-ADSL Setup User Guide Ver.0.0.1. 2000.07.17.
 OS : ALZZA 6.1 / 2.2.12-20kr
 ## 시스템 구성
                                                                ┏ WINDOWS박스1
전화국 --- ADSL 외장형모뎀 --- [eth0]리눅스박스[eth1] --- 허브 ╋ WINDOWS박스2
                                                               ┗ WINDOWS박스3
 ### 설치개요
위 사항을 만들려고 합니다. 우선은 eth0에서 인터넷이 되는것만 해볼랍니다.
 ### 설치파일준비
[root@laneiges /temp]# ll
total 30547
drwxr-xr-x   2 root     root         1024 Jul 18 23:45 ./
drwxr-xr-x  18 root     root         1024 Jul 18 07:14 ../
-rw-r--r--   1 root     root     15079540 Jul 18 23:41 linux-2.2.13.tar.gz
-rw-r--r--   1 root     root        51821 Jul 18 23:45 pppoed0.4.tgz
[root@laneiges /temp]#
   ### 커널 소스 풀기
[root@laneiges /temp]# cp linux-2.2.13.tar.gz /usr/src/
[root@laneiges /temp]# cd /usr/src/
[root@laneiges /usr/src]# ll
total 30332
drwxr-xr-x   4 root     root         4096 Jul 18 23:56 ./
drwxr-xr-x  21 root     root         4096 Jul 18 14:20 ../
lrwxrwxrwx   1 root     root           12 Jul 18 21:04 linux -> linux-2.2.14/
-rw-r--r--   1 root     root     15079540 Jul 18 23:56 linux-2.2.13.tar.gz
drwxr-xr-x  15 1046     xfs          4096 Jul 18 22:31 linux-2.2.14/
-rw-r--r--   1 root     root     15918652 Jul 18 21:04 linux-2.2.14.tar.gz
drwxr-xr-x   7 root     root         4096 Jul 18 14:24 redhat/
[root@laneiges /usr/src]# rm -f linux
[root@laneiges /usr/src]# mkdir linux-2.2.13
[root@laneiges /usr/src]# ln -snf linux-2.2.13 linux
[root@laneiges /usr/src]# tar xvzf linux-2.2.13.tar.gz
[root@laneiges /usr/src]# cd /usr/include
[root@laneiges /usr/include]# ll asm linux scsi
[root@laneiges /usr/include]# rm -rf asm linux scsi
[root@laneiges /usr/include]# ln -s /usr/src/linux/include/asm-i386 asm
[root@laneiges /usr/include]# ln -s /usr/src/linux/include/linux linux
[root@laneiges /usr/include]# ln -s /usr/src/linux/include/scsi scsi
[root@laneiges /usr/include]# cd /temp
   ### PPPoE 커널에 패치
[root@laneiges /temp]# cp pppoed0.4.tgz /usr/local/
[root@laneiges /temp]# cd /usr/local/
[root@laneiges /usr/local]# tar xzvf pppoed0.4.tgz
[root@laneiges /usr/local]# cd /usr/src/linux/
[root@laneiges /usr/src/linux]# zcat /usr/local/pppoed-0.4/2213-pppox.gz | patch -b -p1
   ### 커널 컴파일
[root@laneiges /usr/src/linux]# make mrproper
[root@laneiges /usr/src/linux]# make xconfig
 ### 커널 컴파일 옵션
#pppoed를 사용하기 위해선 아래의 옵션들을 반드시 켜야 합니다.(Y,Yes)
Network Device support
  Y "Network device support"
  Y "tty support for ppp over X"
 #IP Masquerading으로 내부 공유를 하기 위해서는 아래의 옵션들을 반드시 켜야 합니다.(Y,Yes)
Code Maturity options
  Y "Prompt for development and/or incomplete code/drivers"
 Loadable module support
  Y "Enable loadable module"
 General Setup
  Y "Networking Suppoort"
 Networking options
  Y "Network firewalls"
  Y "TCP/IP Networking"
  Y "IP: firewalling"
  Y "IP: masquerading"
  Y "IP: ICMP masquerading"
  Y "IP: masquerading special modules suppport"
  M "IP: ipautofw masquerade support"
  M "IP: ipportfw masq support"
  M "IP: ip fwmark masq-forwarding support"
 Network device support
  Y "Network device support"
  M "Dummy net driver support"
  M "PPP (point to point) support"
 Ethernet (10 or 100Mbit)
  M "RealTek 8129/8139 (not 8019/8029!) support"
  M "PCI NE2000 support" <========매우 중요
 그외 적당한 옵션으로 자신의 시스템에 맞게 설정한 후 저장하고 나온다.
계속진행된다
   ### 커널 컴파일 실행
[root@laneiges /usr/src/linux]# make dep
[root@laneiges /usr/src/linux]# make clean
[root@laneiges /usr/src/linux]# make bzImage
[root@laneiges /usr/src/linux]# cd arch/i386/boot
   ### 커널설치
[root@laneiges /usr/src/linux/arch/i386/boot]# cp bzImage /boot/vmlinuz-2.2.13
[root@laneiges /usr/src/linux/arch/i386/boot]# cp /usr/src/linux/System.map /boot/System.map-2.2.13
[root@laneiges /usr/src/linux/arch/i386/boot]# cd /boot
[root@laneiges /boot]# rm -rf System.map
[root@laneiges /boot]# ln -s System.map-2.2.13 System.map
[root@laneiges /boot]# vi /etc/rc.d/init.d/syslog
                       daemon klogd -> daemon klogd -k /boot/System.map-'uname -r'
[root@laneiges /boot]# cd /usr/src/linux
   ### 모듈설치
[root@laneiges /usr/src/linux]# make modules
[root@laneiges /usr/src/linux]# make modules_install
[root@laneiges /usr/src/linux]# depmod -a
[root@laneiges /usr/src/linux]# cd /etc
 ### lilo 설정
[root@laneiges /etc]# vi lilo.conf
boot=/dev/hda
map=/boot/map
install=/boot/boot.b
prompt
timeout=50
default=linux
 
image=/boot/vmlinuz-2.2.12-20kr
        label=linux
        initrd=/boot/initrd-2.2.12-20kr.img
        read-only
        root=/dev/hda7
image=/boot/vmlinuz-2.2.13
        label=linux13
        read-only
        root=/dev/hda7
 [root@laneiges /etc]# lilo
Added linux *
Added linux13
  ### PPPoed를 컴파일하는 절차이다.
[root@laneiges /etc]# cd /usr/local/pppoed-0.4/
[root@laneiges /usr/local/pppoed-0.4]# make realclean
[root@laneiges /usr/local/pppoed-0.4]# make dev
[root@laneiges /usr/local/pppoed-0.4]# make depend
[root@laneiges /usr/local/pppoed-0.4]# make
[root@laneiges /usr/local/pppoed-0.4]# make install
   ### 새 커널로 부팅 -> 순서가 바뀌어야 될 수도 있음...
[root@laneiges /usr/local/pppoed-0.4]# reboot
lilo: linux13
  ### IP 설정 -> 이부분은 아무것도 하지 않았다. 그냥 내부에서 쓰는 ip로 놔두었다.
ifconfig your ethernet device. It is not necessary you give it ip address 0.0.0.0
(but it may be good practise).
Just make sure you dont have the default route set since PPPOE will give you one.
 ### 요구사항
레드햇 6.0이상에서는 pppd의 버전 2.3.7이상 요구 하지만 2.3.10이 설치되어있음...
   ### PPPoE 환경설정 1
[root@laneiges ~]# vi /etc/ppp/options
lock
local
nocrtscts
noauth
#be careful with mtu/mru if you are masquareding.
# Look at Kal Lin's page at http://www.cs.toronto.edu/~kal/hse/resource.html mru 1490
mtu 1490
#please make sure you have noaccomp for now
noaccomp
#the construct below is needed by sympatico
name "********" // 보안상 *로 표시
#you might want to change defaultroute if you have more
#than one pppoe session
defaultroute
hide-password
sync
#it might be a good idea to uncoment the debug below
#debug
#kdebug 7
#if you use the -R option to make it persistent
#then uncomment the next two lines below
#lcp-echo-interval 240
#lcp-echo-failure 3
#nodetach
#add anything else you need as well
   ### PPPoE 환경설정 2
[root@laneiges ~]# vi /etc/ppp/pap-secrets
# Secrets for authentication using PAP
# client        server  secret                  IP addresses
******** * ***** // 보안상
[root@laneiges /usr/local/pppoed-0.4]# chmod 600 /etc/ppp/pap-secrets
  ### PPPoE 실행
[root@laneiges ~]# cd /usr/sbin/pppoed
[root@laneiges /usr/sbin/pppoed]# ./pppoed
or
[root@laneiges /usr/sbin/pppoed]# ./pppoed -I eth0 // l은 i의 대문자
  ### 메세지 나오고 접속은 안됨
  ### vi /usr/local/pppoed-0.4/pppoed.c
이렇게 해도 안되면 pppoed.c를 살짝 손보아서 다시 시도해 보십시오.
#define DISC_DEB2 1 <-- 이 줄 앞뒤의 주석 표시 (/*, */)를 지우고서,
make clean
make
make install
 [root@laneiges /usr/sbin/pppoed]# ./pppoed -I eth0
### 메세지 나옴
Total retries to go 0
Sending PADI
 send_packet: ifn eth0
 Ethernet header:
h_dest:  ff:ff:ff:ff:ff:ff:
h_source:  00 aa 00 6d a2 fa
h_proto: 0x8863 (PPPoE Discovery)
PPPoE header:
ver: 0x1 type: 0x1 code: 0x09 session: 0x0000 length: 0x0004 (PADI)
PPPoE tag:
type: 0101 length: 0000 (Service name)
 waiting for PADO
PADO received!
 Ethernet header:
h_dest:  00 aa 00 6d a2 fa
h_source:  00 90 39 c5 40 3d
h_proto: 0x8863 (PPPOE Discovery)
PPPoE header:
ver: 0x1 type: 0x1 code: 0x07 session: 0x0000 length: 0x0011 (PADO)
PPPoE tag:
type: 0101 length: 0000 (Service name)
PPPoE tag:
type: 0102 length: 0009 (AC name)
data (UTF-8): kangseo-1
^^^^^^^^^^^^^^^^^^^^^^^ <- 이거 나오면 접속된거 아닌가?
Scanning for Service Name
scan_tag: tag 0x804cd24 length 0 tag->type 101
scan-tag data (bin)
Found it!
 Scanning for AC Name
scan_tag: tag 0x804cd28 length 0 tag->type 101
scan-tag data (bin)
scan_tag: not matched!
scan_tag: tag 0x804cd28 length 9 tag->type 102
scan-tag data (bin): 6b616e6773656f2d31
Found it!
 Scanning for AC cookies
scan_tag: tag 0x804cd24 length 0 tag->type 101
scan-tag data (bin)
scan_tag: not matched!
scan_tag: tag 0x804cd28 length 9 tag->type 102
scan_tag data (bin): 6b616e6773656f2d31
scan_tag: not matched!
 Sending PADR
 send_packet: ifn eth0
 Ethernet header:
h_dest:  00 90 39 c5 40 3d
h_source:  00 aa 00 6d a2 fa
h_proto: 0x8863 (PPPoE Discovery)
PPPoE header:
ver: 0x1 type: 0x1 code: 0x19 session: 0x0000 length: 0x0011 (PADR)
PPPoE tag:
type: 0101 length: 0000 (Service name)
PPPoE tag:
type: 0102 length: 0009 (AC name)
data (UTF-8): kangseo-1
 Waiting for PADS
OK! Discovery is completed successfully
We got session ID 1286 506
AC MAC:0 90 39 c5 40 3d
MAC:0 90 39 c5 40 3d
  cntrl: SessionID (605)
 
 PPP started pid is: 650
 
starting pppd using options file : /etc/ppp/options to pppox interface pppox0
 *** Child Received signal 17 PID 649 ***
status is: 0
Line id which died is: 0
 OK we got killed
 telnet xxx.xxx.xxx.xxx 접속안됩니다.
### 접속안됨니다. 어디가 잘못되었는지요...
     ### 참고로 부팅시 나오는 사항입니다.
Linux version 2.2.13 (root at laneiges.interwebnetwork.com) (gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)) 
#1 Thu Jul 20 07:14:23 KST 2000 Detected 451035525 Hz processor.
Console: colour VGA+ 80x25
Calibrating delay loop... 448.92 BogoMIPS
Memory: 64004k/66496k available (1072k kernel code, 416k reserved, 940k data, 64k init)
VFS: Diskquotas version dquot_6.4.0 initialized
CPU: Intel Pentium III (Coppermine) stepping 03
Checking 386/387 coupling... OK, FPU using exception 16 error reporting.
Checking 'hlt' instruction... OK.
Checking for popad bug... OK.
POSIX conformance testing by UNIFIX
mtrr: v1.35a (19990819) Richard Gooch (rgooch at atnf.csiro.au)
PCI: PCI BIOS revision 2.10 entry at 0xfb2b0
PCI: Using configuration type 1
PCI: Probing PCI hardware
Linux NET4.0 for Linux 2.2
Based upon Swansea University Computer Society NET3.039
NET4: Unix domain sockets 1.0 for Linux NET4.0.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
Initializing RT netlink socket
Starting kswapd v 1.5
Detected PS/2 Mouse Port.
Serial driver version 4.27 with MANY_PORTS MULTIPORT SHARE_IRQ enabled
ttyS00 at 0x03f8 (irq = 4) is a 16550A
ttyS01 at 0x02f8 (irq = 3) is a 16550A
pty: 256 Unix98 ptys configured
Registering PPPoE driver
^^^^^^^^^^^^^^^^^^^^^^^^
apm: BIOS version 1.2 Flags 0x07 (Driver version 1.9)
Real Time Clock Driver v1.09
RAM disk driver initialized:  16 RAM disks of 4096K size
VP_IDE: IDE controller on PCI bus 00 dev 39
VP_IDE: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdc:DMA, hdd:pio
hda: QUANTUM FIREBALLlct10 20, ATA DISK drive
hdc: CRD-8481B, ATAPI CDROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: QUANTUM FIREBALLlct10 20, 19470MB w/418kB Cache, CHS=2482/255/63
hdc: ATAPI 48X CD-ROM drive, 128kB Cache
Uniform CDROM driver Revision:2.56
Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
md driver 0.36.6 MAX_MD_DEV=4, MAX_REAL=8
scsi : 0 hosts.
scsi : detected total.
Partition check:
 hda: hda1 hda2 < hda5 hda6 hda7 hda8 hda9 hda10 >
VFS: Mounted root (ext2 filesystem) readonly.
Freeing unused kernel memory: 64k freed
Adding Swap:216836k swap-space (priority -1)
 id: 0x34  io: 0x300 eth0: Intel EtherExpress Pro/10 ISA at 0x300, 00:aa:00:6d:a2:fa, IRQ 9, 10BaseT.
eth0: set Rx mode to 1 address.
eth0: set Rx mode to 1 address.
eth0: set Rx mode to 1 address.
   ### pppoed 하기전의 ifconfig
eth0      Link encap:Ethernet  HWaddr 00:AA:00:6D:A2:FA 
          inet addr:21x.x26.x25.248  Bcast:21x.x26.x25.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:65 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          Interrupt:9 Base address:0x300
 lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:3924  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
 ### pppoed 하기전의 ps ax
  PID TTY      STAT   TIME COMMAND
    1 ?        S      0:04 init
    2 ?        SW     0:00 [kflushd]
    3 ?        SW     0:00 [kupdate]
    4 ?        SW     0:00 [kpiod]
    5 ?        SW     0:00 [kswapd]
  285 ?        S      0:00 portmap
  301 ?        S      0:00 /usr/sbin/apmd -p 10 -w 5 -W
  354 ?        S      0:00 syslogd -m 0
  365 ?        S      0:00 klogd - klogd -k /boot/System.map-uname -r
  381 ?        S      0:00 /usr/sbin/atd
  397 ?        S      0:00 crond
  417 ?        S      0:00 inetd
  433 ?        S      0:00 lpd
  471 ?        S      0:00 sendmail: accepting connections on port 25
  488 ?        S      0:00 gpm -t ps/2
  504 ?        S      0:00 proftpd (accepting connections)
  521 ?        S      0:00 xfs -droppriv -daemon -port -1
  556 tty1     S      0:00 login -- root   
  557 tty2     S      0:00 /sbin/mingetty tty2
  558 tty3     S      0:00 /sbin/mingetty tty3
  559 tty4     S      0:00 /sbin/mingetty tty4
  560 tty5     S      0:00 /sbin/mingetty tty5
  561 tty6     S      0:00 /sbin/mingetty tty6
  564 tty1     S      0:00 -bash
  597 tty1     R      0:00 ps ax
  ### pppoed 한 후의 ifconfig
eth0      Link encap:Ethernet  HWaddr 00:AA:00:6D:A2:FA 
          inet addr:21x.x26.x25.248  Bcast:21x.x26.x25.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:301 errors:0 dropped:0 overruns:0 frame:0
          TX packets:105 errors:0 dropped:0 overruns:0 carrier:1
          collisions:0 txqueuelen:100
          Interrupt:9 Base address:0x300
 lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:3924  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
 ppp0      Link encap:Point-to-Point Protocol 
          inet addr:211.193.236.132  P-t-P:192.168.1.3  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1490  Metric:1
          RX packets:103 errors:0 dropped:0 overruns:0 frame:0
          TX packets:103 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:10
  ### pppoed 한 후의 ps ax
  PID TTY      STAT   TIME COMMAND
    1 ?        S      0:04 init
    2 ?        SW     0:00 [kflushd]
    3 ?        SW     0:00 [kupdate]
    4 ?        SW     0:00 [kpiod]
    5 ?        SW     0:00 [kswapd]
  285 ?        S      0:00 portmap
  301 ?        S      0:00 /usr/sbin/apmd -p 10 -w 5 -W
  354 ?        S      0:00 syslogd -m 0
  365 ?        S      0:00 klogd - klogd -k /boot/System.map-uname -r
  381 ?        S      0:00 /usr/sbin/atd
  397 ?        S      0:00 crond
  417 ?        S      0:00 inetd
  433 ?        S      0:00 lpd
  471 ?        S      0:00 sendmail: accepting connections on port 25
  488 ?        S      0:00 gpm -t ps/2
  504 ?        S      0:00 proftpd (accepting connections)
  521 ?        S      0:00 xfs -droppriv -daemon -port -1
  556 tty1     S      0:00 login -- root   
  557 tty2     S      0:00 login -- root   
  558 tty3     S      0:00 /sbin/mingetty tty3
  559 tty4     S      0:00 /sbin/mingetty tty4
  560 tty5     S      0:00 /sbin/mingetty tty5
  561 tty6     S      0:00 /sbin/mingetty tty6
  564 tty1     S      0:00 -bash
  617 tty2     S      0:00 -bash
  654 ?        S      0:00 pppd pppox0 38400 file /etc/ppp/options
  698 tty1     R      0:00 ps ax
  ### 왜 안되는 거죠...