[SOLVED] No Web GUI nor SSH but VMs are up and running

[arcticwarrior]

Hello, I would really appreciate your help if you could help me with this. Since the last two or 3 updates, my Proxmox server has had this problem with the GUI; the web GUI is not working. Every time I reboot the host from the host using a keyboard connected directly to it, the GUI works for a few minutes and then stops working. And the SSH is not working either. My previous packages are:

proxmox-ve: 8.0.2 (running kernel: 6.2.16-8-pve)
pve-manager: not correctly installed (running version: 8.0.4/d258a813cfa6b390)
pve-kernel-6.2: 8.0.5
proxmox-kernel-helper: 8.0.3
proxmox-kernel-6.2.16-8-pve: 6.2.16-8
proxmox-kernel-6.2.16-6-pve: 6.2.16-7
pve-kernel-6.2.16-5-pve: 6.2.16-6
pve-kernel-6.2.16-4-pve: 6.2.16-5
pve-kernel-6.2.16-3-pve: 6.2.16-3
ceph-fuse: 17.2.6-pve1+3
corosync: 3.1.7-pve3
criu: 3.17.1-2
glusterfs-client: 10.3-5
ifupdown2: 3.2.0-1+pmx3
ksm-control-daemon: 1.4-1
libjs-extjs: not correctly installed
libknet1: 1.25-pve1
libproxmox-acme-perl: 1.4.6
libproxmox-backup-qemu0: 1.4.0
libproxmox-rs-perl: 0.3.0
libpve-access-control: not correctly installed
libpve-apiclient-perl: 3.3.1
libpve-common-perl: not correctly installed
libpve-guest-common-perl: 5.0.3
libpve-http-server-perl: 5.0.4
libpve-rs-perl: 0.8.4
libpve-storage-perl: 8.0.2
libspice-server1: 0.15.1-1
lvm2: 2.03.16-2
lxc-pve: 5.0.2-4
lxcfs: 5.0.3-pve3
novnc-pve: 1.4.0-2
proxmox-backup-client: not correctly installed
proxmox-backup-file-restore: not correctly installed
proxmox-kernel-helper: 8.0.3
proxmox-mail-forward: 0.2.0
proxmox-mini-journalreader: 1.4.0
proxmox-widget-toolkit: 4.0.6
pve-cluster: 8.0.2
pve-container: 5.0.4
pve-docs: 8.0.4
pve-edk2-firmware: 3.20230228-4
pve-firewall: 5.0.3
pve-firmware: 3.7-1
pve-ha-manager: not correctly installed
pve-i18n: 3.0.5
pve-qemu-kvm: not correctly installed
pve-xtermjs: 4.16.0-3
qemu-server: 8.0.6
smartmontools: 7.3-pve1
spiceterm: 3.3.0
swtpm: 0.8.0+pve1
vncterm: 1.8.0
zfsutils-linux: 2.1.12-pve1

I did not change anything on the network since it was working steadily for some time, so I'm sure it is not related to the network.

Cheers!

 

[bbgeek17]

Every time I reboot the host from the host using a keyboard connected directly to it, the GUI works for a few minutes and then stops working. And the SSH is not working either

based on the limited information you provided, the primary suspect is duplicate IP on the network.

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

 

[arcticwarrior]

based on the limited information you provided, the primary suspect is duplicate IP on the network.

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

The IP for the Proxmox is static and not within the range of the DHCP scope. I'm sure the problem is not the IP. Any other suggestions to check?
The DNS is the same one as the rest of my devices.

 

[bbgeek17]

I would not discard duplicate IP as a cause just yet. If I were you, I would:
- record the MAC address of PVE
- ping PVE while its functioning (or immediately after ssh'ing) - record the MAC as reported on your client
- when it stops working - can you still ping the IP?
- if you can - what MAC address is now reported on your client?

The other possibility is that you have a Realtek NIC and those have had multiple issues with latest PVE.

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

 

[arcticwarrior]

I would not discard duplicate IP as a cause just yet. If I were you, I would:
- record the MAC address of PVE
- ping PVE while its functioning (or immediately after ssh'ing) - record the MAC as reported on your client
- when it stops working - can you still ping the IP?
- if you can - what MAC address is now reported on your client?

The other possibility is that you have a Realtek NIC and those have had multiple issues with latest PVE.

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

Thanks bbgeek17 you were right, one of my VMs took the same IP, this was odd but that was exactly what happened.
It is working nicely now.