how to turn on firework?

[kentzhou]

I installed CentOS 6.5 as guest with VituralBox on Windows 7. Set NAT in VM for network setting. then modify scripts for eth0 in Linux:

NETMASK=255.255.255.0
IPADDR=192.168.0.21
GETWAY=192.168.0.1

when Linux reboot, there are a few thing happening:
1. the IP is 10.0.2.15, not 192.168.0.21
2. I can ping Windows 7 host(IP is 192.168.0.12) from linux
3. but I can't ping 10.0.2.15 from Windows 7 host.
4. I can ping www.google.com from linux to verify internet connection go through.

Question:
1. Why can't ping 10.0.2.12 from Windows 7? because of firewall? if yes, how to turn it off?
I want to linux and windows in same segment with IP like 192.168.0.21, how to do it?

[toracat]

Do you have to use NAT? If you can use the "bridged" network, things will be easier. If you must use NAT, you may want to read this chapter for help.

[kentzhou]

thanks. turn to bridge. then host and guest in same segment and can communicate each other, but can't ping www.google.com from CentOS any more. It is okay from host.

[toracat]

Can you ping if you use IP?

[kentzhou]

no. This is result if I use www.google.com IP(74.125.225.18):

[root@cent ~]# ping 74.125.225.18
connect: Network is unreachable
[root@cent ~]# ping 192.168.0.16
PING 192.168.0.16 (192.168.0.16) 56(84) bytes of data.
64 bytes from 192.168.0.16: icmp_seq=1 ttl=128 time=0.469 ms
64 bytes from 192.168.0.16: icmp_seq=2 ttl=128 time=0.498 ms

192.168.0.16 is windows 7 host.

this is ping from host windows 7 to guest CentOS:

C:\Users\KENT>ping 192.168.0.21
Pinging 192.168.0.21 with 32 bytes of data:
Reply from 192.168.0.21: bytes=32 time<1ms TTL=64
Reply from 192.168.0.21: bytes=32 time<1ms TTL=64
Reply from 192.168.0.21: bytes=32 time<1ms TTL=64
Reply from 192.168.0.21: bytes=32 time<1ms TTL=64

192.168.0.21 is for guest CentOS.