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Re: User mode networking with slirp on MacOs, setting host DNS server?

From: Narcis Garcia
Subject: Re: User mode networking with slirp on MacOs, setting host DNS server?
Date: Tue, 22 Jun 2021 07:26:43 +0200

I'm using this dedicated address because personal addresses aren't
masked enough at this mail public archive. Public archive administrator
should fix this against automated addresses collectors.
El 22/6/21 a les 0:59, Biff Eros ha escrit:
> Looking at this bug report:
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=625689
> There is this comment:
> mjt@tls.msk.ru wrote:
>> No the limitation isn't documented (yet), and it will be difficult
>> to fix too, or maybe not worth a trouble really.  Two reasons.
>> First of all, user-mode networking is not suitable for anything
>> serious, you really want tap networking with bridges, which is
>> about 100 times faster and actually works (e.g. ICMP).  Second,
>> the implementation is rather simplistic - for DNS it merely
>> forwards (like a NAT box) packets from guest to a nameserver
>> from host /resolv.conf - only one nameserver, because you can't
>> NAT to TWO destinations at once.  So in order to fix that,
>> qemu has to become application-level proxy for DNS, instead
>> of a simple NAT "device".
> Unfortunately I'm on MacOs, and I don't want to be using resolv.conf.
> I want it to use a locally running dnsmasq instead.  Can anyone point
> me to which bit of source I need to change to hard-code this to
>, or is that out of the question?

You should be able to point resolv.conf nameserver to your dnsmasq IP.

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