My VM don't have internet

I

issa2020

Active Member
Sep 9, 2020
85
4
28
Hello,

i got an issue

so i change my FAI, and i change on the file :

nano /etc/network/interfaces my gateaway to the new gateway so i got this :

Bash: 
auto lo
iface lo inet loopback

iface enp2s0 inet manual

auto vmbr0
iface vmbr0 inet static
        address 192.168.1.10/24
        gateway 192.168.1.1
        bridge_ports enp2s0
        bridge_stp off
        bridge_fd 0

ok so now i reboot my proxmox

and i can ping and resolv google with shell PROXMOX :

Bash: 
root@proxmox:~# ping google.fr
PING google.fr (142.250.74.227) 56(84) bytes of data.
64 bytes from par10s40-in-f3.1e100.net (142.250.74.227): icmp_seq=1 ttl=114 time=15.9 ms
64 bytes from par10s40-in-f3.1e100.net (142.250.74.227): icmp_seq=2 ttl=114 time=14.9 ms
64 bytes from par10s40-in-f3.1e100.net (142.250.74.227): icmp_seq=3 ttl=114 time=14.4 ms
64 bytes from par10s40-in-f3.1e100.net (142.250.74.227): icmp_seq=4 ttl=114 time=14.4 ms
^C
--- google.fr ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 7ms
rtt min/avg/max/mdev = 14.366/14.884/15.851/0.604 ms
root@proxmox:~# nslookup google.fr
Server:         1.1.1.1
Address:        1.1.1.1#53

Non-authoritative answer:
Name:   google.fr
Address: 142.250.75.227
Name:   google.fr
Address: 2a00:1450:4007:811::2003


Ok so on proxmox i got this :

1640114170065.png



and the DNS :

1640114217218.png



ok so now on my VM machine is a debian :
i got this hardware :
1640114280756.png

and my /etc/network/interfaces is this :

1640114311872.png

and i can't connect on ping google and nslookup not working

can u know how to fix this problem please ?

i can't understnad why my vm can 't connect to the network

thanks all

Edit :
i got more information

on my vm, i can ping my gateway :

but not ip from internet :
1640115209600.png
 
Last edited:
Your VM got a enabled firewall. Did you changed the firewall rules to match your new IPs?
 
wolframio said:
This? https://forum.proxmox.com/threads/no-vm-ct-dns-resolving-on-fresh-install.101480/#post-437966

Every VM or CT that i try have no DNS resolution, i can ping and connect to IP but not to domains, i tried almost everything, changing host dns, changing vm dns, use a dns server that is in my lan, disable firewalls, disable IPv6 a even try another gateway from different ISP.
Click to expand...
same problem and no solution

so the last way is to reinstall from scratch and not understand what's happening in proxmox :/
 
can you show your routes, addresses and links on the host and the guest?
Code: 
ip route show
ip addr show
ip link show
 
dcsapak said:
can you show your routes, addresses and links on the host and the guest?
Code: 
ip route show
ip addr show
ip link show
Click to expand...

HOST:
Code: 
root@servertest:~# ip route show
default via 192.168.1.1 dev vmbr0 proto kernel onlink
192.168.1.0/24 dev vmbr0 proto kernel scope link src 192.168.1.81


root@servertest:~# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: enp6s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr0 state UP group default qlen 1000
    link/ether 00:26:9e:3d:08:e0 brd ff:ff:ff:ff:ff:ff
3: enp6s0f1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:26:9e:3d:08:e1 brd ff:ff:ff:ff:ff:ff
4: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 00:26:9e:3d:08:e0 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.81/24 scope global vmbr0
       valid_lft forever preferred_lft forever
    inet6 fe80::226:9eff:fe3d:8e0/64 scope link
       valid_lft forever preferred_lft forever


root@servertest:~# ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp6s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr0 state UP mode DEFAULT group default qlen 1000
    link/ether 00:26:9e:3d:08:e0 brd ff:ff:ff:ff:ff:ff
3: enp6s0f1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 00:26:9e:3d:08:e1 brd ff:ff:ff:ff:ff:ff
4: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
    link/ether 00:26:9e:3d:08:e0 brd ff:ff:ff:ff:ff:ff

Debian 11 GUEST CT:
Code: 
root@CTtest:~# ip route show
default via 192.168.1.1 dev eth0
192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.94


root@CTtest:~# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0@if5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether b2:4e:c0:fe:97:f4 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 192.168.1.94/24 brd 192.168.1.255 scope global dynamic eth0
       valid_lft 28692sec preferred_lft 28692sec
    inet6 fe80::b04e:c0ff:fefe:97f4/64 scope link
       valid_lft forever preferred_lft forever


root@CTtest:~# ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0@if5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
    link/ether b2:4e:c0:fe:97:f4 brd ff:ff:ff:ff:ff:ff link-netnsid 0

Out of the box fresh install of proxmox and i dont touch anything inseide CT, default config with DHCP.
 
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