[SOLVED] Help How to configure the network of VM to access internet

[Edsw]

Help please I am new in all, and need help please.

I need access to internet from KVM with Centos 7
I need to know what is wrong in my configuration, I can’t have access to internet from my VM.

I have one node with one KVM and one LXC both with centos 7

the node has this configuration:

has 1 network device is this

name	type	Active	Autostar	VLAN aware	Ports/Slave	IP Address	Subnet mask	CIDR	Gateway
enp5s4	network device	Yes	No	No

has 1 linux bridge is this

name	type	Active	Autostar	VLAN aware	Ports/Slave	IP Address	Subnet mask	CIDR	Gateway
vmbr0	linux bridge	Yes	Yes	No	enp5s4	165.170.125.19	255.255.255.0	165.170.125.189/24	165.170.125.1

For the KVM the network device is this

network device(net0)

vmbr0= C*:6*:7*:C*:0*:B*, bridge= vmbr0

in the shell of the node I can do ping google.com and is ok
this to show me

# ping google.com
PING google.com (216.58.206.238) 56(84) bytes of data.
64 bytes from par10s34-in-f14.1e100.net (216.58.206.238): icmp_seq=1 ttl=120 time=0.953 ms
64 bytes from par10s34-in-f14.1e100.net (216.58.206.238): icmp_seq=2 ttl=120 time=1.14 ms
64 bytes from par10s34-in-f14.1e100.net (216.58.206.238): icmp_seq=3 ttl=120 time=1.22 ms

but when I am goin to Console to my KVM with centos 7 I do the ping google.com but is not ok
this is to show me

ping: google.com: Name or service not known

but if I do ping 127.0.0.1 in Console to my KVM that is ok
this is to show me

[root@SC-CT-Test etc]# ping 127.0.0.1
PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data.
64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.024 ms
64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.022 ms
64 bytes from 127.0.0.1: icmp_seq=3 ttl=64 time=0.019 ms
64 bytes from 127.0.0.1: icmp_seq=4 ttl=64 time=0.033 ms

I do not know how to configure the network of my KVM to have access to internet

Please anybody help me with this

Thanks

 

[Faris Raouf]

You need to configure the network settings in the Centos VM itself. Proxmox cannot set them (unless you happened to use a cloud-init image).

During Centos installation, did you enable networking and set up a public IP?

In the Centos VM, check /etc/sysconfig/network-scripts/ifcfg-eth0 as this is (usually) where the network configuration is held

You will need an unused public IP to give it, of course.
You should specify the same gateway IP as you have specified for the node itself. Treat it as a physical server from the point of view of the network (NOTE: I'm assuming bridged networking based on what you have posted, but if this isn't the case then this is beyond my knowledge)

 

[Edsw]

You need to configure the network settings in the Centos VM itself. Proxmox cannot set them (unless you happened to use a cloud-init image).

During Centos installation, did you enable networking and set up a public IP?

In the Centos VM, check /etc/sysconfig/network-scripts/ifcfg-eth0 as this is (usually) where the network configuration is held

You will need an unused public IP to give it, of course.
You should specify the same gateway IP as you have specified for the node itself. Treat it as a physical server from the point of view of the network (NOTE: I'm assuming bridged networking based on what you have posted, but if this isn't the case then this is beyond my knowledge)

Thank you very much for answering me, I did not know that I had to get a public IP I am going to get it and I'm sure to do the test tomorrow and I will let you know how it turned out, I appreciate your help because I am new to all this.

Regards

 

[Edsw]

Thanks @Faris Raouf for your help, you have given me the information that I needed to solve my problem, and for others who have the same problem, here is the configuration

1) For a container, when creating it




2) For a KVM, when creating it



And also for the KVM when you are installing the server, in this case Centos 8 there you must add the rest, preferable when installing the server




If someone wants to add something else to this, you can leave a message