Vmware fusion 12 nat not working11/10/2023 Two services can't listen on the same port. I have analyzed the traffic between host and guest and apparently, when something is running on udp/53 on the host (for example - Cisco An圜onnect + Umbrella or any other antivirus, any other vpn that secures DNS queries) vmWares resolver can't. This causes trouble with DNS name resolution in NAT mode, as Fusion forwarder/resolver is in conflict with ANY resolver running on host! This is completely ridiculous. So this is not pure bridge, something is happening inbetween.Īddition to your findings - macOS is taking care of the whole guest traffic, this is true. http/https trafic doesn't work while most of other traffic do work like windows file sharing, dns, ping, ssh. The issue is that all traffic going via bridged connection for some reason is broken eg. NAT somehow CAN be made to work well for any connection types. For most of the users, bridged networking doesn't go at all with wifi connections while it seems to work on fixed connection. People caring about their VPN clients working from the host could choose Fusion-managed You're 80-95% right here. People caring about guest network performance could use the new model with a host-managed bridge. Ideally, VMWare should fix Fusion and expose a vNIC-level option to fallback to the old behaviour. While this expose your VM (so ensure you have firewalls configured in the guest), it allows you to install a VPN client in your VM. This means your VM is directly connected to the outside network. en0 if you are on Wifi) on the bridge, too. In this case, Fusion will also create a host bridge, but instead of putting an IP address on it and acting as a gateway, it will put the external networking interface (eg. VPN clients (such as GP) will not route traffic which doesn't come from the IP address of the host, so the VM packets don't go anywhere.Ī solution for this, as elsewhere discussed in this thread, is to change the VM network configuration to "Bridged Networking". NAT is not done by Fusion it's done by OSX). In this case, traffic coming from the VM is managed directly by the host and uses the IP address of the VM (ie. It puts the VM interface on the bridge AND puts an IP on the bridge and binds to it (to behave at least as a gateway, DHCP server, and DNS server). Fusion creates a bridge and a regular "en" interface for the VM. VPN clients (I use GlobalProtect) were fine with it, because they recognise the packets as coming from the host.įusion 12 on Big Sur is using a host bridge. VM traffic going through the host basically came from Fusion, which means the source IP address was the host's. Fusion created "vmnet" interfaces and managed them itself. Here's what I found:įusion 11 on Catalina managed the NAT. I used Fusion 11 on Catalina and upgraded to Fusion 12 on Big Sur. Parallels really is starting to sound better by the day. This issue exists with common configurations and can be easily reproduced with that said, VMware really needs to address this and soon. We should probably make a separate thread specifically for this issue that's not caused by excessive OS tweaking or bonkers VPN clients that jack up the network stack. As noted in my previous comment, the issue doesn't appear to affect Linux guests (Ubuntu in this case), based on that it leads me to believe something within the guest needs to be reconfigured, perhaps a VMware tools update is needed to resolve this issue after changes to Windows over time via patching, etc. can be reproduced easily on a fresh install of Fusion and in a fresh Windows 10 guest. If you look at the title of the thread you'll see it's technically about NAT no internet connection, not bridged no internet connection. These "fixes" will not work for our problem. Exactly the same problem as Many are toting fixes that resolve issues that exist after previously modifying their network configuration at a system level, or using (certain?) VPN clients on the host while running guest VMs that may have done so for them (why not just run the VPN in the guest?).
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