[CentOS] Two small issues after upgrade to 4.2

Scot L. Harris webid at cfl.rr.com
Mon Oct 24 20:56:41 UTC 2005

On Mon, 2005-10-24 at 16:13, Kai Schaetzl wrote:
> Scot L. Harris wrote on Mon, 24 Oct 2005 09:40:29 -0400:
> > Most of the times I have seen this it is caused due to having IPv6 
> > enabled.  ssh binds to the port on IPv4 address or IPv6 then tries to 
> > bind a second time to the same port. 
> This makes sense, thanks! I wonder, why it doesn't happen on Suse, though. ipv6 
> is also running there, but no such error message.

I don't know the answer to that.  I ran Suse a while back for only a
short period of time on a test box.  Did not get to deep into that

> >  
> > Personally I usually disable IPv6 and the zero conf stuff on systems. 
> Add "alias net-pf-10 off" to modprobe.conf and reboot? Do I need to do anything 
> else?
> What do you mean with "zero conf stuff"? That is obviously something I'm not 
> aware of.

Actually you should be able to disable IPv6 in the
/etc/sysconfig/network file:

networking_ipv6 = no

(that may be in all caps)

zeroconf is what puts the route in your routing table.  Look
at netstat -rn to see it.

Suppose to allow you to turn on a system without setting up any
networking and the system is suppose to find other systems and self
configure themselves into a network.  You can disable zeroconf by
modifying /etc/sysconfig/network by setting the following:

nozeroconf = yes

(again that may be in all caps, check the file)

Have never seen this used for anything.  And don't expect to see it used
any time soon.

> > But don't count on that action.  Backups are good to have of any 
> > configuration files you have changed.
> Actually, I edit all my config files on my workstation and then transfer the 
> file to the server machine it belongs to. I maintain a mirrored directory 
> structure of all our machines with the most relevant config files and all 
> changed files locally and also carry them around on my laptop. It's so much 
> easier for comparing configuration and in case you need a fast backup, yes :-)

Good plan!

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