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by jlehtone
2021/04/22 13:19:53
Forum: CentOS 7 - Networking Support
Topic: [Solved] systemd-networkd+vlan and IPv6
Replies: 10
Views: 112

Re: systemd-networkd+vlan and IPv6

1. reading sysctl with all parameters but vlan device does not exist at this moment 2. start systemd-networkd and create vlan device 3. -> IPv6 to now existing device Wait! Where did I ..? Bridges! There was similar episode about software bridges (a network device too). IIRC. Most users have bridge...
by jlehtone
2021/04/22 12:33:08
Forum: CentOS 7 - Networking Support
Topic: [Solved] systemd-networkd+vlan and IPv6
Replies: 10
Views: 112

Re: systemd-networkd+vlan and IPv6

To @jllehtone, yes i know this but if i set a kernel variable why should a program ignore this. And on the other hand , why is it working if i call sysctl -p per commandline? Like I said, perhaps on boot: 0. variable has initial state 1. your config sets disabled=1 2. systemd-networkd sets disabled...
by jlehtone
2021/04/22 11:42:57
Forum: CentOS 7 - Networking Support
Topic: [Solved] systemd-networkd+vlan and IPv6
Replies: 10
Views: 112

Re: systemd-networkd+vlan and IPv6

First, I have link-local fe80:* IPv6 address on every interface even though I don't have IPv6 in use. (nmcli "ipv6.method ignore"). Do you really need to get rid of the link-local address? IME, things are more likely to break if you do. As implied above, I do use NetworkManager and have never instal...
by jlehtone
2021/04/22 11:31:05
Forum: CentOS 7 - General Support
Topic: Centos 7 recovery mode
Replies: 1
Views: 34

Re: Centos 7 recovery mode

Potentially a disk issue. Either the virtual machine fails to read or the "whm host" fails to present the storage for the virtual machine to read. The service (provider) is/should be involved in problem resolution. Note: products like cpanel replace vital system components. Therefore, system is no l...
by jlehtone
2021/04/22 11:21:52
Forum: CentOS 7 - General Support
Topic: QR codes
Replies: 4
Views: 65

Re: QR codes

No idea how to scan. https://linuxcommando.blogspot.com/2020/07/how-to-generate-and-read-qr-code-on.html Base has qrencode and python-qrcode for writing images. EPEL has zbar for reading images. You can $ firefox URL , which either starts firefox or adds tab to already running instance with that URL.
by jlehtone
2021/04/21 21:41:26
Forum: CentOS 7 - Hardware Support
Topic: Switch back to integrated graphics
Replies: 5
Views: 98

Re: Switch back to integrated graphics

That repoquery lists: pciutils-libs-0:3.5.1-3.el7.i686 and glibc-0:2.17-317.el7.i686
which are 32-bit binaries. Those one does not need.


You can also:

Code: Select all

cat /proc/bus/pci/devices
but that table is a bit raw.
by jlehtone
2021/04/20 19:06:22
Forum: CentOS 8 - General Support
Topic: [Solved] firewall info appreciated
Replies: 2
Views: 82

Re: firewall info appreciated

First, RHEL 8 has documentation: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_networking/getting-started-with-nftables_configuring-and-managing-networking The kernel has a subsystem that handles network traffic. In CentOS 7's kernel that subs...
by jlehtone
2021/04/20 13:48:34
Forum: CentOS 7 - Networking Support
Topic: [SOLVED] Problem configuration two interfaces
Replies: 4
Views: 90

Re: Problem configuration two interfaces

I have used aliases ... like never . IP-aliases are an obsolete way to manage multiple IP-addresses/masks per interface. Newer tools such as iproute2 support multiple address/prefixes per interface, but aliases are still supported for backwards compatibility. The "newer" iproute2 has been around two...
by jlehtone
2021/04/20 13:01:45
Forum: CentOS 7 - Networking Support
Topic: [SOLVED] Problem configuration two interfaces
Replies: 4
Views: 90

Re: Problem configuration two interfaces

Why? Why do you intentionally want two interfaces to same subnet?
by jlehtone
2021/04/19 16:02:40
Forum: CentOS 8 - Networking Support
Topic: Blocking multiple macs in dhcpd.conf
Replies: 4
Views: 81

Re: Blocking multiple macs in dhcpd.conf

Can you do it the other way; list allowed clients?

Code: Select all

        pool {
                deny unknown-clients;
                range A B;
        }

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