could not connect internet

[yellowhat]

My box is SL 6.1 x86 installed at virtualbox hosted by windows 7 x64.

My problem is could not connect internet.

eth0 file is this.

CODE

DEVICE=eth0 BOOTPROTO=static ONBOOT=yes TYPE=Ethernet IPV4_FAILURE_FATAL=no IPV6INIT=no NAME="sl eth0" UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03 DNS2=168.126.63.2 DNS1=168.126.63.1 USERCTL=no BOOTPROTO=none BROADCAST=192.168.0.255 IPADDR=192.168.0.4 NETMASK=255.255.255.0 NETWORK=192.168.0.0 GATEWAY=192.168.0.1 HWADDR=08:00:27:d3:08:db PREFIX=24 DEFROUTE=yes

and "ifconfig eth0" is here.

QUOTE

[root@localhost Documents]# ifconfig eth0      Link encap:Ethernet  HWaddr x:x:x:x:x:x           inet addr:192.168.0.4  Bcast:192.168.0.255  Mask:255.255.255.0           inet6 addr: x::x:x:x:x/64 Scope:Link           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1           RX packets:0 errors:0 dropped:0 overruns:0 frame:0           TX packets:426 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000           RX bytes:0 (0.0   TX bytes:24879 (24.2 KiB)

And ping could not work.

QUOTE

[root@localhost Documents]# ping 192.168.0.1 PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data. From 192.168.0.4 icmp_seq=1 Destination Host Unreachable From 192.168.0.4 icmp_seq=2 Destination Host Unreachable

Please let me know how to resolve this problem.

Thanks in advance.

[geraldf]

You have to enable "Bridged Networking" in VirtualBox to get ping working.

Best regards

[yellowhat]

QUOTE (geraldf @ Mar 17 2012, 05:52 AM)

You have to enable "Bridged Networking" in VirtualBox to get ping working. Best regards

Yes, installed "bridged adpter".

[geraldf]

What kind of system is 192.168.0.1?
Your router? Your Win 7 workstation?

Maybe a firewall blocks your ping requests.

[yellowhat]

QUOTE (geraldf @ Mar 17 2012, 09:47 PM)

What kind of system is 192.168.0.1? Your router? Your Win 7 workstation? Maybe a firewall blocks your ping requests.

The 192.168.0.1 is internet sharing router's gateway adddress.

And this is iptables.

CODE

# Firewall configuration written by system-config-firewall # Manual customization of this file is not recommended. *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT # Generated by webmin *mangle :FORWARD ACCEPT [0:0] :INPUT ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :PREROUTING ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] COMMIT # Completed # Generated by webmin *nat :OUTPUT ACCEPT [0:0] :PREROUTING ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] COMMIT # Completed

[feedmebits]

try doing it via dhcp first to see if that works, if you get that to work then try doing static ip.


/etc/sysconfig/network-scripts/ifcfg-eth0

change: NM_CONTROLLED="no" to "yes"
change: ONBOOT="no" to "yes"

add: BOOTPROTO="dhcp"

save

service network restart and try again.

If you're using your windows7 machine as a host and bridging the nic I would think your gateway would need to be your host. Cuz your virtual nic is is connected to your physical nic and from there it goes to your router.

[yellowhat]

feedmebits/

Thanks, but same result.

And I re-installed and upgraded scientific linux 6.1 to 6.2 x86, but still could not connect with internet.

At this time the problem is different.

QUOTE

[root@maestro ~]# service network restart Shutting down loopback interface:                          [  OK  ] Bringing up loopback interface:                            [  OK  ] Bringing up interface eth0:  Device eth0 does not seem to be present, delaying initialization.                                                           [FAILED]

ifcfg-eth0

CODE

TYPE=Ethernet BOOTPROTO=static IPADDR=192.168.0.4 PREFIX=24 GATEWAY=192.168.0.1 DEFROUTE=yes IPV4_FAILURE_FATAL=yes IPV6INIT=no NAME="eth0" UUID=d279b508-fa23-4f9f-81c8-d98ae0875eab ONBOOT=yes HWADDR=08:00:27:AE:64:B2 DNS2=168.126.63.2 DNS1=168.126.63.1 DEVICE=eth0 USERCTL=yes NM_CONTROLLED="yes"

I disabled host and guest firewalls and vaccines. Actullay this problem came after upgrade of 6.1. Before this proble, I used this net work settings several years.

If downgrading SL to 6.0 or 6.1 is easy, I want to downgrade to 6.0.

[SFMDS]

Was a final solution posted? Could be a missing or wrong MACmissing or wrong MAC. Try these:

ip -o link
/var/log/messages
cd /sys/class/net;ls -al
/var/log/messages
/var/log/secure
/var/log/dmesg

Or you may need to rename it through udev rules.

Cheers,