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With deeper look and consulting this issue with other people more experienced with Proxmox than me, we did not find the source of the issue. We believe that it is at the host machine. After some more time, I just gave up. Reinstalled the server with Ubuntu 20.04 and I just run everything in...

No worries, thank you for trying. I will get back to this after the Easter holidays. I also got some contacts from friends to people who build larger Proxmox clusters for production, so I hope I will get it moving from there.

Tried, didn't work. The HTTP/HTTPS rules are for forwarding all HTTP(S) traffic toward the VM, since this is ment to run HAProxy, to send traffic to other VMs, since I have only one public IP. Proxmox GUI is still running on default 8006 - I will change that, but later, when setup is done.

I am not planning on using mail, I will disable those rules and try again.

These are all my iptables rules # Generated by iptables-save v1.8.2 on Wed Mar 31 23:45:58 2021 *filter :INPUT DROP [1756:93617] :FORWARD DROP [7492:450394] :OUTPUT ACCEPT [383:15752] :ufw-after-forward - [0:0] :ufw-after-input - [0:0] :ufw-after-logging-forward - [0:0] :ufw-after-logging-input...

I rebooted the VM again and it is back to broken. DNS is just super weird. The prerouting for http and https is from Ondrej Sika's Proxmox Training course https://github.com/ondrejsika/proxmox-training#port-forward Unfortunately, copy-pasting does not work.

Well, dig resolves to domains ok, so it is NOT DNS :D (for now) The issue might be at a firewall level not allowing http and other traffic. There is a reason why I am not a network admin :D

In TCP dump on host machine, I see a lot of records towards Hetzner DNS asing for A and AAAA records, maybe this misconfiguration is there. tcpdump: 19:12:35.150122 IP 192.168.100.101.33172 > ns3-coloc.hetzner.com.domain: 17998+ AAAA? api.snapcraft.io. (34) 19:12:35.150296 IP...

Allright, I added the iptables rules, I am getting access to the outer internet via ping and ICMP, but DNS resolving is not working. I updated the nameservers in /etc/resolv.conf to 1.1.1.1 and 1.0.0.1 (Cloudflare DNS), rebooted the machine with no success. Unfortunately, I can't verify if I...

Yes, I got to documentation, but I did not figure out what I am missing.

Hello Proxmox forums, I am new to Proxmox. I get myself a dedicated server at Hetzner Cloud. I setup cloud-init template of Ubuntu 20.04, everything went fine. I am using 192.168.100.1/24 vmbr0 network. I am using NAT to forward traffic etc., unfortunately I am unable to access public...