can't access neither ssh nor gui after clean install

[mushroomx3]

Dear all, I'm quite new to proxmox and require your help.

Sometimes, for exteamly small period of time ssh and webgui actually works but all other time it looks like all my requests are going to void. Sometimes it can happen in the middle of me doing something remotely - in this case everything will just froze, but server itself continue working.

I'm running a custom homelab on consumer-grade hardware - Ryzen 3900x + 64GB of ECC RAM and Gigabyte X570 Master as motherboard. All hardware is tested, including extensive memtest.
The version of proxmox iso is latest from site - 6.4-1 with latest updates from non-commertical repo via upgrade and dist-upgrade applied after installation.

This is the information I can provide so far;

1, Server has static IP set in my router - 192.168.0.254/24

2. Server remains pingable all the time

3. 8006 is visile from my workstation

nmap -p 8006 192.168.0.254

Starting Nmap 7.80 ( https://nmap.org ) at 2021-05-26 03:27 CEST

Nmap scan report for 192.168.0.254

Host is up (0.0022s latency).


PORT     STATE SERVICE

8006/tcp open  wpl-analytics

wget --no-check-certificate https://192.168.0.254:8006

--2021-05-26 04:19:19--  https://192.168.0.254:8006/
Connecting to 192.168.0.254:8006... connected.

4. I have tried to connect with both firewall started and stopped with no effect

5. netstat -ltn | grep 8006 from server side (pardon, I have no ability to copy it atm, hence re-typing)

tcp6   0   0 :::8006   :::*   LISTEN

journalctl -f showing no obvious errors

systemctl status pveproxy.service showing no errors

tail -f /var/log/pveproxy/access.log
showing only periods, when I was able to connect server. Nothing is logged during my failed attempts.

touch /etc/cloud/cloud-init.disabled trick I saw in other topic has no effect.

pvecm updatecerts -f has no effect

6.All daemons looks like running and their bounce as well as server reboot has no effect

That's pretty much all I have

To be honest, I'm quite bad in linux in general, but I'm able to read outputs and re-produce commands as per examples.

Thank you in advance!

 

[Lorenz.S]

This sounds like a duplicate IP address problem to me. Try to compare the MAC addresses in your workstations ARP table when this problem occurs. My guess would be, that the MAC address changes when you have these short outages.

 

[mushroomx3]

This sounds like a duplicate IP address problem to me. Try to compare the MAC addresses in your workstations ARP table when this problem occurs. My guess would be, that the MAC address changes when you have these short outages.

Thank you, I have checked that now. arp -a showing nothing weird on both server and client.
I've tried to flush arp tables but this made no changes. Server still unaccessible though after flushing - client's MAC address did re-appear in server's ARP table.

 

[Lorenz.S]

You mean, the MAC address is always the right one? Are you sure, there is no other device, that might use your servers ip address anyhow?

 

[mushroomx3]

You mean, the MAC address is always the right one? Are you sure, there is no other device, that might use your servers ip address anyhow?

Just double-checked that from my router side before replying - I see no MAC address or ip address duplication.

I have secondary NIC on server's motherboard and I'm wondering if I should re-configure server on this one and check whether this issue is reproducible.

 

[mushroomx3]

and it randomly start working again...

 

[mushroomx3]

and now its gone once again...

 

[mushroomx3]

It seems like something was messed up from my router side even though I'm not sure what exact because all setings were identical. I have switched my server to dhcp and set IP reservation to make sure it will never change and now all is working.
Thank you for your help and sorry for troules