On Sun, Dec 9, 2012 at 11:05 AM, Eero Volotinen <eero.voloti...@iki.fi> wrote: > 2012/12/9 José Pablo Méndez Soto <aux...@gmail.com>: >> Hello, >> >> I am playing around with SL instead of CentOS so to know which one behaves >> better or just to have a criteria on how they both differ, being RedHat >> re-distros. >> >> I noticed that my virtual machine with GUI, that I built from the >> SL-63-x86_64-2012-08-02-Install-DVD.iso, won't reply to pings or open SSH >> sessions until a user logs in. >> >> I tried the same on a CentOS 6.2 built similarly, and no matter if there >> are users or no users logged in, it always have networking and you can SSH >> into it. >> >> Any idea about this difference? Can it be changed in SL so to initiate >> connections before a GUI log in? > > On RHEL 6 and clones, network is managed by network-manager by > default. You need to disable network manager and configure interfaces > on traditional way. > > Take look at NM_MANAGED on /etc/sysconfig/network-scripts/ifcfg*
NetworkManager is *not the friend* of anyone running a server. It's unfortunately difficult to rip out by the roots, because other components depend on it. And the "system-config-network" tool has no way to gracefully turn it off, you have to use a text editor. You can put "NM_MANAGER=no" in /etc/sysconfig/network, along with "NO_ZEROCONF=yes" to aovid generating those default, irritating "169.254.*" IP addresses at network startup time. > Eero