CentOS

Hi, I'm running a CentOS 8.5 on a server with 4 network interfaces. My was to build a network bridge with a firewalling ability. First of all I put all 3 Nics (only 3, the first is used for administration) into a bridge device: [root@br01 ~]# nmcli connection NAME UUID TYPE DEVICE enp3s0f0 014598e7-...

sudo nmcli con mod br0 bridge.stp off bridge.forward-delay 0 Now I can see the request vom the VM B faster in the tcpdump of the br0 on VM A Yes, If I run tcpdump on eth1 on VM A, I see normal traffic, when I run it on eth0 of VM B, I see nothing. [VM A]# tcpdump -vv -nn -i br0 [VM B]$ ping -c 1 fo...

stp off forward-delay 0 for br0 could affect how bridge behaves. If MAC has been seen, then ARP goes through. Can you run tcpdump on both VMs? (That is my usual debug tool; listen in many points while generating traffic. nmap is another.) How much packets does B see, and where do they originate fro...

>>You should see some state with: >>bridge link >>bridge fdb >>ip neigh [root@BR01 ~]# bridge link 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 100 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 10...

>>In other words, you have "physically": >>Real cable == NIC -- some Hyper-V -- vnic0 :: br0 :: vnic1 -- Hyper-V vswitch -- vnic2 second Hyper-V VM -All on the same Hyper-V Server Right ! >>The vnic0 :: br0 :: vnic1 is VM A. It (br0) is in subnet 192.168.0.0/21. The br0 is like a "managed switch". R...

Hi, I'm running two CentOS 8 4.18.0-305.25.1.el8_4.x86_64 #1 SMP Wed Nov 3 10:29:07 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux Nodes on an Microsoft Hyper-V 2012. My Idea was to build with one node a bridge with firewall function, so I can reach the other node from the local network but protect him via...

Solved ! here is what I did: removed the not working ati-driver : yum remove xorg-x11-drv-ati installed/checked if vesa-driver is installed: yum install xorg-x11-drv-vesa and then edit the grub2 kernel line in /etc/default/grub: nomodeset xdriver=vesa so mine looked like that right now: GRUB_CMDLINE...

Sorry but no /etc/X11/xorg.conf, only :

/etc/abrt/plugins/xorg.conf
/usr/share/abrt/conf.d/plugins/xorg.conf

Hmm so how do I install a different driver or get the default running again ?

Would it help to try this :
yum remove xorg-x11-drv-ati ?, nope just tried it, no change, reinstalled it.

HI Trevor, sorry for the multipost. I allready removed the 'rhgb' and 'quiet' settings from the kernel command line. I can't find anything execpt the lines from messages postet before and this little line from the Xorg.0.log: [ 27.995] (II) Initializing extension GLX [ 28.000] (EE) AIGLX error: dlop...

I'm running a CentOS Linux release 7.9.2009 (Core) 3.10.0-1160.21.1.el7.x86_64 on a HP DL380 G7 as a KVM/QEMU hostsystem. After an update I'm no longer able to log in via X-Server. In the /var/log/messages I found this: Apr 9 15:17:42 yoruko org.gnome.Shell.desktop: X Error of failed request: BadVal...