[Cialug] Firewalld & VMs

[Scott Yates]

Pretty sure DNS needs port 53 open.  UDP is the default, but should fall
back to TCP.

On Wed, May 22, 2024 at 3:59 PM L. V. Lammert <lvl at omnitec.net> wrote:

> Have two Linux Xen hosts:
>
>         Host 1
>                 Linux VM 1
>                 Linux VM 2
>                 Linux Vm 3
>
> Everything works file.
>
>         Host 2
>                 Win10 VM 1
>                 Win10 VM 2
>
> VMs can ping out, but DNS just does not work at all!
>
> The only difference is that Host 1 is only a host, Host 2 also services
> Samba/CIFS. Comparing the firewalld configuration [in the manager UI,
> Yast], shows ONLY ssh port open on Host 1, but all normal ports open on
> Host 2 (dns, mdns, samba, samba-client, ssh).
>
> Does Win10 require something wonky to use a DNS server that firewalld
> might be blocking? Turing OFF firewalld allows the VMs on Host 2 to work
> normally, ..
>
>         TIA!!
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