Hi,
I just installed RHEL 5.2 for proxy server. eth0 connected to WAN and eth1 connected to LAN. After assigning the ip address for eth1 if i restart the network services eth1 goes inactive.

eth0: RTL8139, SMC EZ card - 10.0.0.37
eth1: RTL8101E PCI Express - 192.168.1.66

Network Status
Configured device
lo eth0 eth1
Currently active devices
lo peth0 virbr0 vif0.0 eth0 xenbr0

Kindly help...

If you open a terminal and do

#/sbin/ifconfig

what do you see? Can you post the output?

It would help to have that ifconfig, however I am gunna suggest also you check /etc/sysconfig/network-scripts/ifcfg-eth1 and look for the onboot line. I suspect simply this is set to no, it needs to be set to yes for eth1 to be started automatically. You can either restart the network or run ifup (within the same directory) to bring eth1 up. If ifup brings up an error message then their is likely a configuration problem.

[root@localhost ~]# /sbin/ifconfig
eth0 Link encap:Ethernet HWaddr 00:50:BA:5A:C3:65
inet addr:10.0.0.37 Bcast:10.255.255.255 Mask:255.0.0.0
inet6 addr: fe80::250:baff:fe5a:c365/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:460 errors:0 dropped:0 overruns:0 frame:0
TX packets:425 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:389592 (380.4 KiB) TX bytes:71479 (69.8 KiB)

eth1 Link encap:Ethernet HWaddr 00:1E:90:7D:A6:5D
inet addr:192.168.1.66 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::21e:90ff:fe7d:a65d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1325 errors:0 dropped:0 overruns:0 frame:0
TX packets:578 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:212229 (207.2 KiB) TX bytes:156106 (152.4 KiB)
Interrupt:16 Base address:0x2000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:5100 errors:0 dropped:0 overruns:0 frame:0
TX packets:5100 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:4911346 (4.6 MiB) TX bytes:4911346 (4.6 MiB)

peth0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:2075 errors:0 dropped:0 overruns:0 frame:0
TX packets:931 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:549089 (536.2 KiB) TX bytes:222252 (217.0 KiB)
Interrupt:19 Base address:0xec00

vif0.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:957 errors:0 dropped:0 overruns:0 frame:0
TX packets:2075 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:229645 (224.2 KiB) TX bytes:549089 (536.2 KiB)

virbr0 Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:41 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:8779 (8.5 KiB)

xenbr0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:2134 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:296281 (289.3 KiB) TX bytes:0 (0.0 b)

You have mail in /var/spool/mail/root

Here is the output. Now this problem has been solved. Restarted the server once and now eth0 & eth1 are up.

Now facing a diff problem with internet browsing. If i set G/W for LAN not able to browse the internet. If i left blank for G/W internet is working fine in the server.

I am guessing your gateway is 192.168.1.1? Maybe the output to /sbin/route might help here or more information, there isn't enough here to really help with.

Yes you are right. 192.168.1.1 is my G/W.
[root@localhost ~]# /sbin/route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 eth1
192.168.122.0 * 255.255.255.0 U 0 0 0 virbr0
169.254.0.0 * 255.255.0.0 U 0 0 0 eth1
10.0.0.0 * 255.0.0.0 U 0 0 0 eth0
default SpeedTouch.lan 0.0.0.0 UG 0 0 0 eth0

Here is the output.

Looks to me like you have no default gateway on eth1 but have one on eth0, unfortantly I don't know enough about route to really fix that one but I suspect all you need is a default gateway set-up for eth1. Hopefully somebody else will know better then me .

You only need one default - it's where addresses other than those covered on other defaults are routed.

Korexmohan, is SpeedTouch.lan a reasonable default gateway? By this I mean, any requests that aren't to 198.168.1.0/24, 192.168.122.0/24 and 10.0.0.0/8 are going via that IP on eth0

If SpeedTouch.lan is your gateway, then it's a good default.

Edit r3 - You may find this interesting http://linux-ip.net/html/routing-intro.html

Hi Billy,
Here is my conf is. WAN 10.0.0.37 G/W 10.0.0.136 and LAN 192.168.1.66 g/w -Nil-. With this conf my proxy is working well. Whether any changes need to be made or i can continue with this......

What's the IP of SpeedTouch.lan though? Should that be your default gateway?

Ip for SpeedTouch.lan:10.0.0.136 its my internet gateway. Is it possible to change that to 192.168.1.1 (My LAN g/w)

The default gateway is where everything that isn't specifically routed goes. If you tried to contact (say ping) an address, say 333.333.333.333, the request would go via the default gateway since it isn't covered by the address ranges in the first 4 lines of the route output you showed earlier.

I suspect what you have is the correct setting.

Is everything working with this route setup? I'm a bit lost. If not, what's the current problem?

it could be the problem of profiles, you need to add both of them in a same profile and set ONBOOT=yes

Thanks pals...Now my proxy is working fine....

Thx for your help

I searched for eth1 won't stay active;
r3sistance solved the problem for me with post #3.
onboot=no needs to be set to yes.

Thanks