After changing eth0's ip, ping not work

windstory · 01-23-2009, 12:25 AM

I have selected intel pro/1000 network adapter 1 for NAT.

And I changed 10.0.2.15 ip to 192.168.0.11 by under-mentioned commands.

Code:

ifconfig eth0 down 
ifconfig eth0 192.168.0.x netmask 255.255.255.0 up  
ifconfig eth0

My box is centos 5.2 x86 as guest and windows 7 x64 as host.
And eth0 configuration is as shown at screen shot.

http://www.postimage.org/PqaA6UJ.jpg

Please let me know how can fix this problem and connect to internet.
I want to connect internet through eth0 with ip:192.168.0.x for my dns configuration.

rylan76 · 01-23-2009, 05:03 AM

Quote:

Originally Posted by windstory

I have selected intel pro/1000 network adapter 1 for NAT.

And I changed 10.0.2.15 ip to 192.168.0.11 by under-mentioned commands.

Code:

ifconfig eth0 down 
ifconfig eth0 192.168.0.x netmask 255.255.255.0 up  
ifconfig eth0

Hmm, shouldn't the above be

Code:

ifconfig eth0 down 
ifconfig eth0 192.168.0.x netmask 255.255.255.0 up  
ifconfig eth0 up

i. e. add "up" to the last line?

Additionally, you may need to configure a gateway in order to get on the net - i. e. add a line like this, which "points" to your router / bridge / proxy / whatever you use to get on the internet:

Code:

/sbin/route del default
/sbin/route add default gw 10.0.0.2 eth0

where 10.0.0.2 is your router or gateway address.

My whole "recipe" to do the above looks like this:

Code:

/sbin/ifconfig eth0 down
/sbin/ifconfig eth0 10.0.0.8 netmask 255.255.255.0 broadcast 10.254.255.255 up
/sbin/route del default
/sbin/route add default gw 10.0.0.2 eth0

since I installed my Linux box as having IP 169.254.255.10, but later I had to change it to 10.0.0.8 ...

Hope this helps.