Sorry, but I didn't understood how can I apply the patch. Why is virt-manager able to connect to one of the servers, and unable to connect to the other 2 servers? Is there any missing update or configuration that I should make in these servers? Tanks again, ----- Att, Bruno Santana <div class="gmail_quote">On Mon, Aug 1, 2011 at 4:29 PM, Eric Blake <<a href="mailto:eblake@redhat.com">eblake@redhat.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="im">On 08/01/2011 01:04 PM, Bruno Lamps wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> I also have a simple personal computer, that I use to manage my 3 production servers. This PC was running OK with ubuntu 11.04, dunno what libvirt version and virt-manager 0.8.7 until two weeks ago, when I decided to format him and install Centos 6 and Fedora 15, just for kicks. With Centos 6.0 and it's default virt-manager version, I was able to connect to one of my servers, identified with IP 192.168.1.4. But when I try to connect to one of the other servers, virt-manager freezes. </blockquote> </div> Sounds like: <a href="https://bugzilla.redhat.com/show_bug.cgi?id=726174" target="_blank">https://bugzilla.redhat.com/show_bug.cgi?id=726174</a> That is, Debian-based nc must be used with -q0, whereas Red Hat-based nc does not understand -q. There's a proposed patch for this: <a href="https://www.redhat.com/archives/libvir-list/2011-July/msg02041.html" target="_blank">https://www.redhat.com/archives/libvir-list/2011-July/msg02041.html</a> -- Eric Blake <a href="mailto:eblake@redhat.com" target="_blank">eblake@redhat.com</a> +1-801-349-2682 Libvirt virtualization library <a href="http://libvirt.org" target="_blank">http://libvirt.org</a> </blockquote></div>