Bridged VM has no internet but only able to ping host machine. Host and VM both have separate public IP addresses.

[yongsiklee]

I needed to edit my post because I was not careful posting IPv4s, etc.

Below contains my real ipaddr and gateway:

Host's interface:

iface eth0 inet manual

auto vmbr0
iface vmbr0 inet static

address XX.XX.65.139/22
gateway XX.XX.64.1
bridge-ports eth0
bridge-stp off
bridge-fd 0

VM interfaces:

device=eth0
onboot=yes
bootpronto=none
ipaddr=XX.XX.66.37
netmask=255.255.252.0
gateway=XX.XX.64.1
dns1=8.8.8.8
dns2=8.8.4.4

*VM can ping to the host's ip only.

Any suggestion, pls?

 

[gurubert]

The default gateway of the VM has to be in the same subnet as the VM's IP.

 

[yongsiklee]

*I just corrected my mistyped netmask for vm: it should be 255.255.252.0.

Apparently they are not in the same subnet and that's how this provider has given to me.
And I tried to use host's gateway for this VM, it still didn't work.
My understanding is Proxmox bridge is acting like a switch and if a VM has proper network setup on its own, it has to work.
If this VM is a stand-alone machine, this network setting works fine even with a different subnet gateway.

What alternative way I can get in this situation?

 

[yongsiklee]

The default gateway of the VM has to be in the same subnet as the VM's IP.

I just edited my original post with some real ipaddr and gateway.

 

[gurubert]

Can you ping the VM's default gateway from within the VM?

 

[yongsiklee]

Can you ping the VM's default gateway from within the VM?

The provider now says both IPs share one gateway XX.XX.64.1 (....65.1 for the host's machine still worked strsangely so I did not complain in the first place anyway). But I still cannot ping the gateway from within VM (LXC container).

 

[yongsiklee]

Can you ping the VM's default gateway from within the VM?

I configured the host machine with the 2nd IP and it worked. I can ping gateway and the world.

So both the IPs work fine on its own- it does not work on VM though.

I attached the original network interfaces when I installed debian and proxmox. Please, take a look at it.

 

[yongsiklee]

Can you ping the VM's default gateway from within the VM?

/etc/network/interfaces (guest lxc) :

auto lo
iface lo inet loopback

dns-nameservers 8.8.8.8

auto eth0
iface eth0 inet static
address xx.xx.65.139/32
gateway xx.xx.66.37
pointopoint xx.xx.66.37

/etc/network/interfaces (Proxmox hostnode):

auto lo
iface lo inet loopback

iface eth0 inet manual

auto vmbr0
iface vmbr0 inet static
address xx.xx.66.37/22
gateway xx.xx.64.1
bridge-ports eth0
bridge-stp off
bridge-fd 0
post-up ip route add xx.xx.65.139/32 dev vmbr0
post-up echo 1 > /proc/sys/net/ipv4/ip_forward
post-up echo 1 > /proc/sys/net/ipv4/conf/eth0/proxy_arp

Pinging from the guest:

root@creek-1:~# ping yahoo.com
^Xping: yahoo.com: Temporary failure in name resolution

root@creek-1:~# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
From XX.XX.66.37: icmp_seq=1 Redirect Host(New nexthop: XX.XX.64.1)
From XX.XX.66.37: icmp_seq=1 Redirect Host(New nexthop: XX.XX.64.1)
From XX.XX.66.37: icmp_seq=1 Redirect Host(New nexthop: XX.XX.64.1)
From XX.XX.66.37: icmp_seq=1 Redirect Host(New nexthop: XX.XX.64.1)
^C
--- 8.8.8.8 ping statistics ---
11 packets transmitted, 0 received, 100% packet loss, time 10223ms

 

[gurubert]

Does your provider use a MAC filter on the switch?

 

[yongsiklee]

Does your provider use a MAC filter on the switch?

The provider says: " The mac address is for the interface. The virtual interface is 1 per vps."
My VPS has two ip addresses in it and this mac address is for the VPS.

For reference, the following network configuration is created by default by the provider when installing Devian fresh on the VPS:

auto eth0
iface eth0 inet static
address XX.XX.66.37
netmask 255.255.252.0
gateway XX.XX.64.1


auto eth0:0
iface eth0:0 inet static
address XX.XX.65.139
netmask 255.255.252.0
gateway XX.XX.64.1

 

[gurubert]

The mac address is for the interface. The virtual interface is 1 per vps."
My VPS has two ip addresses in it and this mac address is for the VPS.

Do you try to run Proxmox inside a VPS where the hoster only allows one MAC address per VPS?

 

[yongsiklee]

Do you try to run Proxmox inside a VPS where the hoster only allows one MAC address per VPS?

Yes, I do. Any possibility to achieve it?

 

[gurubert]

Any possibility to achieve it?

You could bind the IP on the Proxmox host and do a full NAT to the VM, which runs on a private network.

 

[yongsiklee]

You could bind the IP on the Proxmox host and do a full NAT to the VM, which runs on a private network.

You can bind up IP but cannot Mac. Right? It seems problem is Mac.

 

[yongsiklee]

You could bind the IP on the Proxmox host and do a full NAT to the VM, which runs on a private network.

Is it possible you can send me configuration for the routed, based on the above network interfaces I posted?

 

[yongsiklee]

Never mind. I got it working. Thx.

 

[manoj007]

How you make it working can you give us some routing info or example?