Laptop anda = 10.0.0.2 ( gatewaye 10.0.0.1 iaitu ETH1 )
ETH1 = 10.0.0.1
perkara pertama, kita perlu enablekan ip forwarding di dalam Linux. edit fail /etc/systcl.conf dan ubah mengikut konfigurasi di bawah.
[root@hotspot ~]# vi /etc/sysctl.conf
# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and
# sysctl.conf(5) for more details.
# Controls IP packet forwarding
# ubah jadi 1 ( default =0 )
net.ipv4.ip_forward = 1
# Controls source route verification
net.ipv4.conf.default.rp_filter = 1
# Do not accept source routing
net.ipv4.conf.default.accept_source_route = 0
# Controls the System Request debugging functionality of the kernel
kernel.sysrq = 0
# Controls whether core dumps will append the PID to the core filename.
# Useful for debugging multi-threaded applications.
kernel.core_uses_pid = 1
Kemudian, create satu script bernama route.sh dan masukkan data berikut :
route.sh
# firewall.sh
/sbin/iptables -F
/sbin/iptables -t nat -F
/sbin/iptables -t mangle -F
/sbin/iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
/sbin/iptables -A FORWARD -i eth1 -j ACCEPT
echo 1 > /proc/sys/net/ipv4/ip_forward
Kemudian laksanakan arahan berikut
sh route.sh
kemudian cuba ping google.com melalui Laptop anda. sepatutnya anda boleh ping ke Google.com


11 comments:
route.sh tuh nk save kat ne??
letak dalam /root/route.sh
kemudian chmod +x /root/route.sh
kemudian sh /root/route.sh
last sekali cuba tengok /sbin/service iptables status
bro..
tutorial 1st aku dah berjaya..
tp bab 2 tak lepas..
command taktau nak edit cmne..
file tu dah bkk..nak ubah ape command nak edit nye..
kena pakai ctrl+(hruf) ke utk write out,save,edit,dll..
ajar bro..
bukan ke bila dah set
net.ipv4.ip_forward = 1
dalam /etc/sysctl.conf maka router dah set sebagai router.
rasanya tak perlu lagi utk masukkan
echo 1 > /proc/sys/net/ipv4/ip_forward
ke dalam file route.sh.
kenapa tak edit je file /etc/sysconfig/iptables?
masukkan rules ni:
*nat
:PREROUTING ACCEPT [41:3192]
:POSTROUTING ACCEPT [28:1680]
:OUTPUT ACCEPT [31:1904]
-A POSTROUTING -o eth0 -j MASQUERADE
COMMIT
*filter
......
......
asyik nak kena masukkan
~]#sh run route.sh
bila restart comp..
Ada cara nak kekalkan tak???
cara lain selepas running route.sh
boleh guna /sbin/service/uptables save
atau
letak dalam /etc/rc.d/rc.local
#!/bin/sh
sh /root/route.sh
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