Troubleshooting Network

No Network Connection

Check 1: Bridge Exists

# Show bridges
brctl show
 
# Check IP
ip addr show vmbr0

Check 2: VM Network Config

# Check VM network
qm set 100 --net0 virtio,bridge=vmbr0
 
# Restart networking
systemctl restart networking

Check 3: Firewall

# Check firewall
ufw status
 
# Allow all traffic (test)
ufw disable

DNS Issues

# Test DNS
nslookup proxmox.local 8.8.8.8
 
# Update resolv.conf
echo "nameserver 8.8.8.8" > /etc/resolv.conf

See Also

• Troubleshooting
• Networking
• VLAN-Config

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