Postings by =?ISO-8859-1?Q?G=FCnther_J=2E?= Niederwimmer

secondary MX Server


postfix 3.4.5

i mean i have a correct running postfix server. ;-)

Now I like to create a secondary postfix for my system.

What are the best to realize, have this two servers in sync?

I have enable postscreen, all I found on Internet, is to have installed
memcache is this correct?

But what can / must I sync?

Thanks for a answer,

epel repository broken


I have now over two Days this errors on all my systems ?

Updateinfo file is not valid XML: <open file '/var/cache/yum/x86_64/7/epel/
updateinfo.xml.zck', mode 'rt' at 0x7f464cf24420>

a "yum clean all" dont't change the Problem!

KVM Client NetworkManager Problem


On my systems I have after update to last centos 1810 a big Problem with the

Om my system I have three NIC two are connected from hardware (hostdev) the
last is connected from the bridge on the host.

KVM Bridge Problem

is this only my mistake,or can help any from the list?

I have 3 host computer on different places, but all have the Problem when
starting a client "KVM" to connect to the bridge from the host.

It is near not possible to start a client, only after 10-20 reboot/restart
from the client's the network is starting correct?

Is this only on my computers or have other also this Problem?

Is the bridge software is broken ?

Can I use openvswitch to replace bridge Software?

Any help are welcome ;-)

Problem with Network devices on boot


I have a question about network devices ??

on my systems Centos 7.5 I have a Problem with starting Network devices!

I set up two servers with KVM on the first I have 6 KVM installed Systems on
the second I have 5 KVM installed systems?

When I have to reboot my system (Kernel update....) the most time one Network
Device is missing on the KVM Clients (eth0)

I have configured my system with I/O Shared Network like this


<interface type='hostdev' managed='yes'>
<mac address='XX:XX:XX:XX:XX:XX'/>
<address type='pci' domain='0x0000' bus='0x03' slo

Mirror Problem

I have thousands of this messages on my servers ??

Is this a Problem on my site or is the infrastructure broken??

Could not get metalink <a href="" title=""></a>?
repo=epel-7&arch=x86_64 error was
14: HTTPS Error 503 - Service Unavailable

Thanks for a answer,

X-Window system ?

Hello List,

I have a big Problem to install a KVM Client with virt-manager, after Update
to CentOS 7.4 it is not more possible to start the virt-manager :-(.

Is there a way to configuration the system to start virt-manager again without
to install "GNOME"

Thanks for a answer

certificate for www.xxxx.xx has expired ?? (hostname)


I found this Morning a Message in my Logs, that is new for me and I never seen
this before?

Is this a Error in the Certificate System??

The certificate for <a href="" title=""></a> has expired
Datum: 08.07.17 06:31
Von: root <gjn+ ... at example dot at>
An: gjn+ ... at example dot at
################# SSL Certificate Warning ################

Certificate for hostname '', in file (or by nickname):

The certificate needs to be renewed; this can be done
using the 'genkey' program.

Browsers will not be able to correctly connect to this
web site usin

Question Mirrors ?

Hello List,

in the last weeks I have many, many Errors from chron hourly on my systems :-

Have we broken or not updated mirrors in the yum config ?

Thanks for a answer,

CentOS 7 openvswitch

can I found a repository with openvswitch ?

I have to install openvswitch for my NIC's om my Server, then I can configure
my KVM NIC's better.

Thanks for a answer,

Problem after last Update


why it is always a Problem when a kernel, firewall or KVM update is installed ?

I have a system with a server CentOS 7 (last) and 6 KVM Clients after the
Update Installation and reboot the most in Network is not functional ?

I lost NIC's and the firewalld change the zone ......

I have always to control is the KVM Clients working ?

Have any a idea what is wrong on my system ?

Thanks for a answer,

selinux problem policies


My problem is to add selinux policies
can any help to say what is wrong with my policies
I write this!

semanage fcontext -a -t httpd_sys_rw_content_t "/var/www/html(/.*)?/

I have more instances from typo3
I found this construct in the selinux policies

but my is not working ?

and I have only errors?

neverallow check failed at /etc/selinux/targeted/tmp/modules/100/selinuxutil/
(neverallow selinuxutil_typeattr_1 semanage_store_t (file (relabelto)))
allow at /etc/selinux/targeted/tmp/modules/100/selinuxut

last update yum and kernel Problem


the last update brings much Problems ?

On my System the most KVM client have a crashed yum

after reboot the new kernel is broken and have a panic screen

I have to reboot to a older kernel ?

The first I have to run

afterward i have to reinstall the kernel ??

this helps to restart the KVM Client !

is it possible the deltarpm is broken ?

Also RPM or "yum check" have a problem with the new update for ipa-*
I mean the problem is the naming


What is broken with fail2ban

Hello List,

with CentOS 7.2 it is not longer possible to run fail2ban on a Server ?

I install a new CentOS 7.2 and the EPEL directory
yum install fail2ban

I don't change anything only I create a jail.local to enable the Filters
enabled = true
When I start afterward fail2ban
systemctl status fail2ban is clean

But systemctl status firewalld is broken

‚óŹ firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor
preset: enabled)
Active: active (running) since Sa 2016-08-20 12:08:27 CEST; 4min 50s

vsftpd broken ?


CentOS 7.2

have any a workaround for this Error ?

vsftpd Error:426 failure Reading Network STream

after transfer I have a broken file on the ftp Server

I mean I have found a newer Version 3.0.3 bot not for CentOS 7.2 but I cant
say is this Problem corrected in 3.0.3?

Any hint please ;-)

Broken KVM System CentOS 7.2


CentOS 7.2

I have three Server on all is now broken the KVM System, it is not possible to
start KVM Clients ?

Have any a hint why ?

Thanks for a answer

KVM Network (NetworkManager) broken


CentOS 7.2

I have a bad big problem with my Server running KVM Client.

I have the most time restarting (reboot) the system a not running network !!!
my interfaces change the name from eth1 to ensX or a Interface is not

I mean I have all Situation tested with NetworkManager without NetworkManager
but the problem exist!!!

I have 4 Interfaces created on install


this was created on install?

have any a idea what is going wrong with centos

Thanks for a answer,

fail2ban problem new installation


I have a big problem with fail2ban and firewalld on my new system.

I have a server running (CentOS 7.1) and run a Update to 7.2 on this system
all is working ?

BUT I install a new system with CentOS 7 1511 on this systems fail2ban don't
work anymore.

CentOS 7 Lost NIC


I have a big problem with my servers.

I have 4 NIC on all my KVM Servers but the most time on a start (restart) I
lost one NIC? It is not always the same, but this two are virtio NICs.

with ifup eth0(1) the system say,I have no configured eth0 or eth1 file ?

Can any tell me what I can do?

thank's for a answer

NetworkManager is disabled.

firewalld-config Centos 7(1) fine tuning


I have now update a System from Centos 7 to 7(1) with all updates now the
firewall-config don't work anymore :-(.

Why is firewall-config working on a (old) Centos 7 but not on a CentOs 7(1)?

I have this Error now

** (firewall-config:30598): WARNING **: Couldn't connect to accessibility bus:
Failed to connect to socket /tmp/dbus-HNMIxNWkgn: Verbindungsaufbau abgelehnt
ERROR:root:Could not find any typelib for NetworkManager
Traceback (most recent call last):
File "/usr/bin/firewall-config", line 34, in <module>
from gi.repository import NetworkManager
ImportError: cannot



centos 7(1)

I have a question about abrt-auto-reporting?

should this work normal ?

I have on my System Problems to report the Errors.

Thanks for a answer,

named Update Problem


I have enabled for a Domain DNSSEC and it working correct, after I change the
rights for /var/named to root:named 0770

but after a update it is always change back to root:named 0750

after this, DNSSEC don't work any more?

named have no right to write his secure files.

Is there a way to fix this


KVM Kernel crash problem


With my new system centos 7.1 and KVM I have kernel crashes on boot in the
DomU's like this

id c51a566956f67146b061f2e7500c78090fe6eed4
reason: BUG: soft lockup - CPU#2 stuck for 23s!

NFS4 automount and IPA (sssd) ?


CentOS 7.1 IPA 4.1 sssd 1.2

om my system it is not possible to automount with a IPA config,, when I mount
this on a command line it is working

I have this Error in the logs

automount[1718]: lookup_read_map: lookup(sss): getautomntent_r: No such file
or directory.

Is this from a broken sssd?

have any a working configuration?

The mount points are created but inside the mount points I have no files and

thanks for a answer

Question centos 7 upgrade


I make a test installation with the new iso 1503-01 but I mean with this
release is anything broken ?

The first thing, is it "normal" with this release avahi-daemon is not

I disable this always ;-)

The nfs-server installation don't work any more correct for me, I can't
connect from a client?

some packages are broken like firewall-config?

Is it a better way to install the "normal" Centos 7 and afterward upgrade to
Centos 7 1503.

Thanks for a answer,

Firewall-config NetworkManager Problem (Centos-7( 1))


I installed the Firewall-config on a new system and have bad Errors

The firewall-config brake with a error line 53 can't load NetworkManager
and on a reboot I have this Message.

ABRT hat 1 Fehler festgestellt.



have any a running ldap/TLS System.

On my system it is not possible to configure this correct.

I have a self signed CA and certificates.

All i found with google is not working :-(

Have any a hint to config this correct?

My CA and certificates works with a SUSE installation correct?

What is the difference to CentOS 7 ?


LVM Configuration


I miss the system-config-lvm tool for CentOS 7 can I found this on a other

viirt-who Problem or my mistake ?


I am new on centos and have installed a KVM Server, now on my host i have on a
new start a Error from virt-who and virt-who never starts.

root@bbs init.d]# service virt-who start
virt-who starten: Traceback (most recent call last):
File "/usr/share/virt-who/", line 33, in <module>
from subscriptionmanager import SubscriptionManager,
File "/usr/share/virt-who/", line 24, in <module>
import rhsm.connection as rhsm_connection
ImportError: No module named rhsm.connection

resolf.conf lost


I have a big Problem with centos 6.4 KVM client. After a new start i lost
always my resolf.conf and this file is empty, have any a hint why?