no internet connection on fresh install

usera

New Member
Jul 22, 2025
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Hello everyone, I just installed proxmox on a zymablade behind a modem/router. There I have my local PC, which has a local IP and can reach internet. It can also ssh into the proxmox, which has its local IP as well.

However, I cannot ping google or anything from proxmox. It is probably a dns problem, but I cannot manage to find a way to solve it.
here are my proxmox configs:
ip a:
Code:
root@pve:~# ip a
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 noprefixroute 
       valid_lft forever preferred_lft forever
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP group default qlen 1000
    link/ether 00:e0:4c:30:44:f7 brd ff:ff:ff:ff:ff:ff
3: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 00:e0:4c:30:44:f7 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.41/24 scope global vmbr0
       valid_lft forever preferred_lft forever
    inet6 fe80::2e0:4cff:fe30:44f7/64 scope link 
       valid_lft forever preferred_lft forever
Code:
root@pve:~# cat /etc/resolv.conf
nameserver 8.8.4.4
Code:
root@pve:~# cat /etc/network/interfaces
auto lo
iface lo inet loopback

iface enp2s0 inet manual

auto vmbr0
iface vmbr0 inet static
        address 192.168.0.41/24
        gateway 192.168.0.255
        bridge-ports enp2s0
        bridge-stp off
        bridge-fd 0


source /etc/network/interfaces.d/*
Code:
root@pve:~# ping google.com
ping: google.com: Temporary failure in name resolution

can anyone see the main problem here?

Thank you in advance !
 
Hey,

can you ping
- the GW
- other devices on 192.168.0.41/24
- 8.8.4.4
?

What is the output of ifreload -avvv?
 
Are you sure the gateways correct?
 
sorry, I do not know what GW stands for?
I can ping other devices on the same subnetwork yes (like my pc that ssh to it, at 192.168.0.39), but I cannot ping 8.8.4.4
 
ohh sorry, this one gateway 192.168.0.255, the gateway

is a default route set (ip r)?
 
Last edited:
Can you try this via keyboard and monitor to see what kind of ip you get and what the gateway is?
Code:
ifdown vmbr0
dhclient -v
 
UPDATE: it turns out that the gateway was not correct, I stupidly copied the broadcast of my subnetwork instead. Now I changed it and everything looks fine. Thank you anyway to everyone for such impressive reactivity !