DNS for host

A

avidesh

New Member
Dec 28, 2023
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3
Hi, I have installed openWRT on my proxmox. I used static ip address of openWRT (192.168.1.1) as DNS for proxmox host. I am unable to access internet from proxmox host. I am able to access internet from all other clients of openWRT.

up on investigating further, I noticed that the using openWRT static ip as DNS for proxmox was causing the issue. When I added a secondary DNS 8.8.8.8 proxmox host was able to connect to internet.

What did I do wrong while using openWRT host as DNS for proxmox host?
 
Hey,

is the OpenWRT VM also the gateway, or do you just use it as a DNS? Can you ping the OpenWRT VM from your PVE host? Are they on the same network? Could you also post the outputs of these three commands
Code: 
cat /etc/network/interfaces

ip a

qm config <vmid>
<vmid> is the ID of your OpenWRT VM.
 
Code: 
auto lo
iface lo inet loopback

iface enp2s0 inet manual

iface enp3s0 inet manual

iface enp4s0 inet manual

iface enp5s0 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

auto vmbr1
iface vmbr1 inet static
        address 192.168.1.1/24
        bridge-ports enp3s0
        bridge-stp off
        bridge-fd 0
#openwrt1

auto vmbr2
iface vmbr2 inet manual
        bridge-ports enp4s0
        bridge-stp off
        bridge-fd 0
#openwrt2

auto vmbr3
iface vmbr3 inet manual
        bridge-ports enp5s0
        bridge-stp off
        bridge-fd 0
#iotlan

source /etc/network/interfaces.d/*


result of ip a
Code: 
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 mq master vmbr0 state UP group default qlen 1000
    link/ether a8:b8:e0:01:23:1f brd ff:ff:ff:ff:ff:ff
3: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr1 state UP group default qlen 1000
    link/ether a8:b8:e0:01:23:20 brd ff:ff:ff:ff:ff:ff
4: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr2 state UP group default qlen 1000
    link/ether a8:b8:e0:01:23:21 brd ff:ff:ff:ff:ff:ff
5: enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr3 state UP group default qlen 1000
    link/ether a8:b8:e0:01:23:22 brd ff:ff:ff:ff:ff:ff
6: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether a8:b8:e0:01:23:1f brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.10/24 scope global vmbr0
       valid_lft forever preferred_lft forever
    inet6 fe80::aab8:e0ff:fe01:231f/64 scope link
       valid_lft forever preferred_lft forever
7: vmbr1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether a8:b8:e0:01:23:20 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.1/24 scope global vmbr1
       valid_lft forever preferred_lft forever
    inet6 fe80::aab8:e0ff:fe01:2320/64 scope link
       valid_lft forever preferred_lft forever
8: vmbr2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether a8:b8:e0:01:23:21 brd ff:ff:ff:ff:ff:ff
    inet6 2405:201:1007:e4e:aab8:e0ff:fe01:2321/64 scope global dynamic mngtmpaddr
       valid_lft 4777sec preferred_lft 4777sec
    inet6 fe80::aab8:e0ff:fe01:2321/64 scope link
       valid_lft forever preferred_lft forever
9: vmbr3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether a8:b8:e0:01:23:22 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::aab8:e0ff:fe01:2322/64 scope link
       valid_lft forever preferred_lft forever
10: veth100i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:ad:5b:77:02:3e brd ff:ff:ff:ff:ff:ff link-netnsid 0
11: veth101i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:4f:fa:88:4f:0b brd ff:ff:ff:ff:ff:ff link-netnsid 1
16: tap102i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr1 state UNKNOWN group default qlen 1000
    link/ether 3e:0c:0a:8f:91:64 brd ff:ff:ff:ff:ff:ff
17: tap102i1: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr2 state UNKNOWN group default qlen 1000
    link/ether 82:b3:19:4d:8c:6a brd ff:ff:ff:ff:ff:ff
18: tap102i2: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UNKNOWN group default qlen 1000
    link/ether aa:2e:1e:5c:e2:5f brd ff:ff:ff:ff:ff:ff
19: tap102i3: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr3 state UNKNOWN group default qlen 1000
    link/ether 4e:a8:e6:0f:4c:68 brd ff:ff:ff:ff:ff:ff
20: veth104i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:8c:96:ec:8d:e1 brd ff:ff:ff:ff:ff:ff link-netnsid 2

qm config output

Code: 
boot: order=scsi0
cores: 1
description: <div align='center'><a href='https%3A//Helper-Scripts.com'><img src='https%3A//raw.githubusercontent.com/tteck/Proxmox/main/misc/images/logo-81x112.png'/></a>%0A%0A  # OpenWRT%0A%0A  <a href='https%3A//ko-fi.com/D1D7EP4GF'><img src='https%3A//img.shields.io/badge/&#x2615;-Buy me a coffee-blue' /></a>%0A  </div>
efidisk0: local-lvm:vm-102-disk-0,efitype=4m,size=4M
memory: 256
meta: creation-qemu=8.1.5,ctime=1708589371
name: openwrt
net0: virtio=BC:24:11:24:91:40,bridge=vmbr1
net1: virtio=BC:24:11:4E:92:4D,bridge=vmbr2
net2: virtio=BC:24:11:98:F3:7C,bridge=vmbr0
net3: virtio=BC:24:11:61:2B:C5,bridge=vmbr3
onboot: 1
ostype: l26
scsi0: local-lvm:vm-102-disk-1,size=512M
scsihw: virtio-scsi-pci
smbios1: uuid=3cbd68d4-1e9f-435c-a53f-03b9e21825b1
startup: order=1
tablet: 0
vmgenid: 9fdd86a0-2d99-4420-b43f-756a52fb5e0f
 
hi @avidesh did you solve the problem?
I'm having the same issue, but even defining 8.8.8.8 as a dns provider in proxmox doesn't help.
 
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