Cant access from outside to my Servers

M

makaruxx

New Member
May 1, 2013
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1
Hello,

I have a problem. I cant connect from outside to my Servers... My interface file looks like this:

# network interface settings
auto lo
iface lo inet loopback

iface eth0 inet manual
broadcast 176.57.xxx.255
network 176.57.xxx.0

auto vmbr0
iface vmbr0 inet static
address 176.57.141.xxx
netmask 255.255.255.0
gateway 176.57.xxx.1
bridge_ports eth0
bridge_stp off
bridge_fd 0

auto vmbr0:1
iface vmbr0:1 inet static
address 176.57.142.xx
netmask 255.255.255.0

auto vmbr0:8
iface vmbr0:8 inet static
address 176.57.141.xx
netmask 255.255.255.0
Click to expand...

I add the unasaigned ip to my vServer that i orderd from my Hoster. Then i start it, but i cant connect to it...
The Ip that i added to the vServer isnt added in the interface file. So it MUST work... but it doesnt...

I can ping the IP Address from my Node. "ping 176.57.143.xxx" but i cant reach the IP from outside...
Whats wrong?

http://www7.pic-upload.de/01.02.14/swklydyph6in.jpg

I hope someone know this problem :/
 
Last edited:
Hi,
your network.conf look strange.

Normaly you should use only an IP on vmbr0 - and in your case (same IP-range for clients).
If your ISP need all traffic from one MAC-Address you must use iptables...

Code: 
# network interface settings
auto lo
iface lo inet loopback

iface eth0 inet manual

auto vmbr0
iface vmbr0 inet static
    address 176.57.141.xxx
    netmask 255.255.255.0
    gateway 176.57.xxx.1
    bridge_ports eth0
    bridge_stp off
    bridge_fd 0
Then use an bridged interface for the VM/CT and define the right network-config inside the client.

After that, you can see the traffic with "tcpdump -i vmbr0 host ip.of.one.vm" on the host while you ping the VM from outside.

Udo
 
Thanks for the reply. I used your network configuration but it still doesnt work. I cant ping the VM from outside but i can the VM ping from my Main Root in Putty... I think its a traffic/routing problem. And yes, the IP that i used for the VM is not added to the network conf. And if i try the "tcpdump" command, it says:

-bash: tcpdump: command not found

But thats not the main problem right now.

http://www7.pic-upload.de/01.02.14/qhyuneip5ag.jpg
 
I have iptables. The default Firewall on Debian 6.0.

Well, when i ping "176.57.xxx.1" (Gateway) i got no answer...

root@kd007:/home# ping 176.57.xxx.1
PING 176.57.xxx.1 (176.57.xxx.1) 56(84) bytes of data.

--- 176.57.xxx.1 ping statistics ---
38 packets transmitted, 0 received, 100% packet loss, time 36999ms
Click to expand...

I think thats bad, isn't it? But how can i fix this?
 
makaruxx said:
I have iptables. The default Firewall on Debian 6.0.

Well, when i ping "176.57.xxx.1" (Gateway) i got no answer...



I think thats bad, isn't it? But how can i fix this?
Click to expand...
Hi,
I guess that your ISP need the MAC-address from your Server (perhaps you can enable further mac-addresses in an webfrontend?).
What do you see with tcpdump when you ping the router?

If you can't enable more mac-addresses, you must use iptables-rules on the host to Nat the traffic. There are some threats about this - but i have not much experiences with this.

Udo
 
Okey, problem solved.

I just changed /proc/sys/net/ipv4/conf/vmbr0/proxy_arp to 1 and it works now.. I can access to the VM now.

Do you know what this command does? I dont understand why it now works.
 
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