[SOLVED] Cannot acces to the Web Interface and i don't know why

[ardou]

hi,
I have just switched to a new provider and I am no longer able to access the Proxmox web interface. I have already tried modifying the network and IP configurations via /etc/network/interfaces and /etc/hosts of the cluster, which are accessible locally on Proxmox via curl, but nothing changes; I still cannot access it from an external browser. I have looked into many solutions but haven't been able to find one that works. Can you help me?

 

[KevinS]

Have your tried ifdown/ifup on the interface and checked with

ip a

if the ip address is actually changed?

Can you ping anything from the Proxmox machine? Is there an active firewall which still uses the old IP addresses?

 

[ardou]

Have your tried ifdown/ifup on the interface and checked with

ip a

if the ip address is actually changed?

Can you ping anything from the Proxmox machine? Is there an active firewall which still uses the old IP addresses?

After some investigation, I indeed found a problem.

ip a

does return the address assigned by my router, but I am unable to access any resources from the internet; no curl, and even apt cannot run. The only thing I have been able to do so far is manually back up each VM.
Furthermore, I do not have an active firewall on the machine.

 

[KevinS]

Aren't there any error messages when you run apt/curl? Does your name resolution work? (ping proxmox.com for example)

 

[ardou]

The only error message I get is the timeout one. And no, name resolution doesn't work. So I decided to reset my machine after manually backing up each VM (Great tuto here). I had to export them to an external hard drive formatted in exFAT (Here to learn how to mount a disk) to copy the files before launching my new Proxmox. After that, I just downloaded the backups from my drive into the backup folder and with the interface restored, I was able to restore the VMs.
Everything is in perfect working order now with my new network configuration.

Thank you for trying to help me