Can't connect to GUI after update

[ErikZ]

Hi,
I'm a Proxmox newbie. I did a fresh installation and everything worked as expected. I was able to access the GUI from other computers conected to the LAN.
Then I searched and installed updates. After installing the updates I rebooted the machine.
Now it's impossible to connect to the GUI, although I can ping the server. If I log on to the console I can ping other machines on the network.
I can even access the GUI from the console using curl like this:

curl https://localhost:8006 | grep title

What can be wrong? How can it be fixed? Why can't it be reached from other computers?

Any help is greatly appreciated.

 

[bbgeek17]

Now it's impossible to connect to the GUI, although I can ping the server. If I log on to the console

physical console or SSH? If physical - can you login via SSH? I hope you can if your ICMP is working.

What can be wrong? How can it be fixed? Why can't it be reached from other computers?

Provide your:
"ip a"
"cat /etc/network/interface"
ping to/from PVE

---

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

 

[ErikZ]

physical console or SSH? If physical - can you login via SSH? I hope you can if your ICMP is working.

I had to use the pysical console since I can't conect using SSH. Unfortunately I didn't test using SSH before upgrading. Can something be done to enable SSH from the pysical console?

I got this error.
kex_exchange_identification: read: Connection timed out

so i tested to turn off the SSH service using service ssh stop ad the i got an expected error

ssh: connect to host 192.168.1.1 port 22: Connection refused

Provide your:
"ip a"
"cat /etc/network/interface"
ping to/from PVE

---

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

 

[bbgeek17]

You forgot to attach the requested information, even a photo would be ok.

In addition - add "ipconfig" or equivalent from your workstation.

Its unusual that a new node on the network would have 192.168.1.1 IP. There is a good chance you have an IP conflict due to assigning an in-use IP.

---

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

 

[ErikZ]

First of all - I really appreciate your help. Thank you so much.

From my windows workstation

IPv4 Address. . . . . . . . . . . : 192.168.2.124
Subnet Mask . . . . . . . . . . . : 255.255.252.0
Default Gateway . . . . . . . . . : 192.168.2.1

and pinging from this workstation

Pinging 192.168.1.1 with 32 bytes of data:
Reply from 192.168.1.1: bytes=32 time=1ms TTL=63

My router is configured to have an dhcp ip range from 192.168.2.2 - 255

ip a



cat /etc/network/interfaces



and pinging my workstation from proxmox console

 

[leesteken]

cat /etc/network/interfaces

View attachment 63734

My router is configured to have an dhcp ip range from 192.168.2.2 - 255

Change the DHCP range on the router to 192.168.2.3-254 and use 192.168.2.2/24 for Proxmox (instead of 192.168.1.1/26) and reboot.

 

[milew]

masz miszmasz w adresach sieciowych

na oknach
maska 255.255.252.0 nie jest 26-bitowa, jest 22-bitowa, a adresy zakresów to
Min.hosta: 192.168.0.1
HostMax: 192.168.3.254

na promoxie
masz 255.255.255.192, jest to 26-bitowy adres, a zakres adresów to
Min. Host: 192.168.1.1
HostMax: 192.168.1.62

 

[ErikZ]

Thank you both of you.
There must be something I missing here. Bare with me.
My thought was to use addresses 192.168.1.1-192.168.1.62 for proxmox and 192.168.2.2-192.168.2.255 for devices that get thier address from the DHCP server. To match this I also changed the network mask to 255.255.252.0
If I change my config as @leestecken suggests, doesn't proxmox and dhcp server share the same addresse range then?

Am I missing something elementary here?

 

[milew]

Your proxmox don-t know where is address 192.168.2.124
proxmox tray to use gateway 192.168.2.1 but gateway is out of range it address 192.168.1.1-192.168.1.64

 

[bbgeek17]

Am I missing something elementary here?

Yes, you need to beef up your network skills:
https://www.techopedia.com/6/28587/internet/8-steps-to-understanding-ip-subnetting

---

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

 

[leesteken]

My thought was to use addresses 192.168.1.1-192.168.1.62 for proxmox and 192.168.2.2-192.168.2.255 for devices that get thier address from the DHCP server. To match this I also changed the network mask to 255.255.252.0

255.255.252.0 is /22 not /26, if I'm not mistaken. Give Proxmox 192.168.1.1/22 (instead of 192.168.1.1/26) and make sure all other systems use the same /22 or 255.255.255.252.0.

If I change my config as @leestecken suggests, doesn't proxmox and dhcp server share the same addresse range then?

That's why I suggested shrinking the DHCP range, so it would not overlap with the IP I suggested. I did not notice your 255.255.252.0 netmask, sorry.

Am I missing something elementary here?

I did not immediately understand your preferred/special subnet of 192.168.0.0/22 instead of the usual 192.168.x.0/24. Why not use the entire 192.168.0.0/16?

 

[bbgeek17]

I did not notice your 255.255.252.0 netmask, sorry.

Yes, same here. Op really buried the lede there, didnt he?

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