Date: Fri, 21 Sep 2007 07:08:41 -0500 (CDT) From: "Doug Poland" <doug@polands.org> To: "RW" <mlt01@mlists.homeunix.com> Cc: freebsd-questions@freebsd.org Subject: Re: QEMU and tap problems Message-ID: <3942.208.49.58.254.1190376521.squirrel@email.polands.org> In-Reply-To: <20070921024706.47a4094c@gumby.homeunix.com.> References: <20070920112119.GA43389@polands.org> <20070921024706.47a4094c@gumby.homeunix.com.>
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On Thu, September 20, 2007 20:47, RW wrote: > On Thu, 20 Sep 2007 06:21:20 -0500 > Doug Poland <doug@polands.org> wrote: >> >> I've been following the various instructions I've found on the web >> in an attempt to get tap networking with qemu-devel-0.9.0s.20070802 >> > > Are you actually sure that you actually need tap? > Good question. My reason for running Win2K server under QEMU is I'm working on a java app that speaks to SQLServer. Initially, all I need is to communicate with the host/guest on the same machine. After that, I'll need the QEMU guest to be on the network so I can connect to the java app from other computers. > > A lot of the how-tos are out of date > I've noticed that :( > > - recent versions of Qemu can give a guest network access without it. > When I started QEMU with the -net nic -net user switches, then Windows gets a 10. address and the guest can see the network. However, I cannot see open ports I'm interested in, 1433 and 3389, from the host. >> Windows thinks it has connectivity, but I cannot ping the default >> gateway from the guest and I cannot ping the IP of the guest from >> the host. > > This suggest you are accessing the net without tap, ping is a setuid > binary so pings generated in the guest can't be passed on by qemu. > The guest definitely could not see the hosts network with tap set up the way I described. I was using ping as a basic diagnostic tool and did not know the limitation you described. -- Regards, Doug
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