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Isn't auto required if you want ifup to take care of a particular interface automatically? Or is it only at boot? I think the default proxmox install does put it in there.

ikke thanks for your reply. Here's the iptables-save output # iptables-save # Generated by iptables-save v1.8.7 on Wed Dec 1 07:37:46 2021 *nat :pREROUTING ACCEPT [321165:18565718] :INPUT ACCEPT [8976:471461] :OUTPUT ACCEPT [451:29458] :pOSTROUTING ACCEPT [10548:614086] -A POSTROUTING -s...

I've been trying to get this working for a few days now. I am doing exactly as told on the documentation and a few other docs. On one server the MASQUERADE settings do not apply (empty rule) on the other the rules apply but the VMs on the private LAN cannot reach the internet. They can ping the...

Check the output of iptables -t -nat -L and post please. On my new install iptables nat commands on vmbr1 do not fail but they don't register in iptables either. It might be what's happening to you too.

I think you'd need a switch, a virtual switch , a real cable between the machines or a vpn to be able to do this.

I'm gonna say their traffic will be using their IP, routed via the main IP of the bridge on the host. Your host will be a router like any other. If you can get MACs for your VM IPs, bridge networking is much simpler. You can even do dhcp if your provider supports it.

This would not cause the nat error message as far as I know, and it's already set in my case.

You would use NAT to allow vms to go out and port forwarding to expose your services on the public IP you have. https://pve.proxmox.com/wiki/Network_Configuration#_masquerading_nat_with_tt_span_class_monospaced_iptables_span_tt . (Or use IPV6 if your ISP gives you a block)

I am not familiar with the netplain config (i use debian style networking on ubuntu) but it's always worth a quick check to see if you can get the IP with dhcp. If that works you know that you only have a config problem.

I am having a similar issue. It exhibits itself as if the post-up stuff in '/etc/network/interfaces' is getting ignored, but even when I run iptables manually and check iptables -t nat -L, there's nothing in it. iptables does not show an error. Is pve-firewall flushing custom rules or...

It would help to see your /etc/network/interfaces file. Also if you copied the command from somewhere, make sure the single quotes are actually single quotes. Some websites use backticks for display. I had a similar error due to that yesterday. Though yours seems different. The error message...

@heutger I hear you. I've used a lot of open source products. Actually exclusively. I think you're the same. I'll figure this out for sure and I might put together something regarding my setup later. Thanks.

I've been playing with PMG since yesterday. It looks nice enough but I have kind of been disillusioned when I started to need documentation. The admin guide seems more like a list of config options and parameters than a functional document. As far as I can tell it doesn't address that some...

@heutger Thank you for your quick and detailed response. I think it's worth at least checking out PMG on its own for a bit. I never had a separate mail gateway before and the only time I tried to with the community version of Mailcleaner I found it to be broken even as a ready made virtual...

@heutger hello. I came to this forum post after seeing your blog post. I haven't translated to read it yet but there's enough info here too. I am currently running a pretty customized virtual host setup with postfix+dovecot where MailScanner (spamassassin) is doing the tagging of spam. I am...