hellow everbody.
iam using 32 bit centos 6.2 on my desktop and iam new to linux. i have eth0 and eth1 on my desktop. so i have some problems i have menson here:
i have edited:
etc/sysctl.conf
net.ipv4.ip_forward = 1
and i have edited iptables too
# iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
# iptables --append FORWARD --in-interface eth1 -j ACCEPT
# iptables-save
this is my configuration of my desktop:
for eth0
address netmask gateway
10.10.10.101 255.0.0.0 10.10.10.254
dns servers 10.10.10.254
10.10.10.254 is my wireless router given from my isp.
for eth1
address netmask gateway
192.168.1.1 255.255.255.0 10.10.10.101
dns servers 10.10.10.101
i have windows xp installed in my laptop:
local area network:
address netmask gateway
192.168.1.2 255.255.255.0 192.168.1.1
dns servers 192.168.1.1
when i enable eth0 and eth1:
eth0 Link encap:Ethernet HWaddr 00:E2:1C:D1:42:A3
inet addr:10.10.10.101 Bcast:10.255.255.255 Mask:255.0.0.0
inet6 addr: fe80::2e2:1cff:fed1:42a3/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3058 errors:0 dropped:0 overruns:0 frame:0
TX packets:3222 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2719502 (2.5 MiB) TX bytes:430301 (420.2 KiB)
Interrupt:21 Base address:0xe000
eth1 Link encap:Ethernet HWaddr 00:C0:26:75:B2:D7
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::2c0:26ff:fe75:b2d7/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:11 errors:0 dropped:0 overruns:0 frame:0
TX packets:80 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:676 (676.0 b) TX bytes:11555 (11.2 KiB)
Interrupt:22 Base address:0xa000
problem from my desktop (10.10.10.101) enabling eth0 and eth1
when i ping yahoo.com from my desktop (10.10.10.101)
PING yahoo.com (209.191.122.70) 56(84) bytes of data.
From 192.168.1.1 icmp_seq=1 Destination Host Unreachable
From 192.168.1.1 icmp_seq=3 Destination Host Unreachable
From 192.168.1.1 icmp_seq=4 Destination Host Unreachable
From 192.168.1.1 icmp_seq=6 Destination Host Unreachable
From 192.168.1.1 icmp_seq=7 Destination Host Unreachable
i was not able to get reply
when i ping 10.10.10.254. 10.10.10.254 is my wireless router given from my isp.
$ ping 10.10.10.254
PING 10.10.10.254 (10.10.10.254) 56(84) bytes of data.
64 bytes from 10.10.10.254: icmp_seq=1 ttl=64 time=0.311 ms
64 bytes from 10.10.10.254: icmp_seq=2 ttl=64 time=0.279 ms
64 bytes from 10.10.10.254: icmp_seq=3 ttl=64 time=0.285 ms
64 bytes from 10.10.10.254: icmp_seq=4 ttl=64 time=0.309 ms
i get reply
problem from my laptop or 192.168.1.2
1 ) while ping 192.168.1.1 (eth1 on desktop) from 192.168.1.2 (from laptop) i get reply.
2 ) i was not able to browse internet form my 192.168.1.2 (laptop)
3 ) but when i disable eth1, i was able to browse internet on my desktop but no connection between eth1 (desktop) and my laptop
while disabling eth1:
eth0 Link encap:Ethernet HWaddr 00:E2:1C:D1:42:A3
inet addr:10.10.10.101 Bcast:10.255.255.255 Mask:255.0.0.0
inet6 addr: fe80::2e2:1cff:fed1:42a3/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2721 errors:0 dropped:0 overruns:0 frame:0
TX packets:2817 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2285759 (2.1 MiB) TX bytes:381862 (372.9 KiB)
Interrupt:21
eth1 Link encap:Ethernet HWaddr 00:C0:26:75:B2:D7
inet6 addr: fe80::2c0:26ff:fe75:b2d7/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1005 errors:0 dropped:0 overruns:0 frame:0
TX packets:1025 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:72323 (70.6 KiB) TX bytes:85135 (83.1 KiB)
Interrupt:22 Base address:0xc000
ping yahoo.com from my desktop (10.10.10.101)
PING yahoo.com (98.139.183.24) 56(84) bytes of data.
64 bytes from ir2.fp.vip.bf1.yahoo.com (98.139.183.24): icmp_seq=1 ttl=49 time=412 ms
64 bytes from ir2.fp.vip.bf1.yahoo.com (98.139.183.24): icmp_seq=2 ttl=49 time=405 ms
64 bytes from ir2.fp.vip.bf1.yahoo.com (98.139.183.24): icmp_seq=3 ttl=49 time=396 ms
64 bytes from ir2.fp.vip.bf1.yahoo.com (98.139.183.24): icmp_seq=4 ttl=49 time=421 m
iam so confused. what i need is i want to enable eth0 and eth1 and can browse internet from my desktop and can share internet to other laptop through switch.
any kinds of ideas, suggestions and guidelines are welcome and i'll greatful if u let me clear my problem.
THANK YOU IN ADVANCE.