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Archive for the 'NIX Posts' Category

VMware: Add user and group access to only a single ESXi host

Follow the following steps to add specific user and group access to a single ESXi host: Configure a single group, be it AD (remote) or Local. Add user to the above group. Login to the VCSA (vSphere Client). Select the ESXi host.  Click on the Permissions tab. Click on the + icon.  You will be […]

VMWare: Enable Management network: Error – Setting ip/ipv6 configuration failed

Getting a rather cryptic ESXi error message when trying to set a new IPv4 IP: Enable Management Network: Error Setting ip/ipv6 configuration failed: For example, when trying to set, this is what is seen: It doesn't really, really say what the real reason behind the error is.  Taking a dive into the network configuration […]

DD-WRT: Fixing DNS Resolution through Networking Tab

In case the below error is seen: C:\Users\tom>nslookup josh-vm01.nix.mds.xyz Server:  UnKnown Address: *** No internal type for both IPv4 and IPv6 Addresses (A+AAAA) records available for josh-vm01.nix.mds.xyz The fix for this is to enable Setup -> Networking -> Optional DNS Target then fill in the target DNS server, in this case for our […]

OpenVPN: Can’t ping public or internet IP’s, but can ping local or internal IP’s

While establishing an OpenVPN connection, the internal IP's are able to ping yet the external IP's are not, the issue might be with packet NAT from tun to vlan2 interfaces.  Note below there are NO replies: root@DD-WRT-KHUFU:/jffs/etc/openvpn# tcpdump -na -s0 -i tun2 icmp tcpdump: verbose output suppressed, use -v[v]… for full protocol decode listening on […]

VIRSH: Virtualizing a Physical Rocky 8 Linux Machine

Let’s just jump right in into virtualizing a KVM based Physical Server using various KVM tools such as Virsh, Cockpit etc.  Will also introduce a twist by configuring bonding at the end, not the beginning, to document a retrofit to an existing environment. Begin by identifying how the various network interfaces that will make up […]

502 Bad Gateway The server returned an invalid or incomplete response.

Running into this error? 502 Bad Gateway The server returned an invalid or incomplete response. This error only popped up when keepalived was started.  Otherwise just with HAproxy, a timeout was seen. It appeared as if it was a keepalived config error.  In this case, it was due to a faulty HAproxy configuration: [root@jenkins01 jenkins]# diff […]

DHCPD and DHCLIENT: Routes and gateway disappear or go missing or get removed

On one of the Linux hosts, the routes were correctly populated: # route -n Kernel IP routing table Destination     Gateway         Genmask         Flags Metric Ref    Use Iface         UG    0   […]

ILO: Integrated Lights Out: Accessing Server Management and Console

HP ILO X is the Hewlett Packard server management Integrated Lights Out software running independently from the main circutry of the host itself.  It allows remote management including power on/off, status checks, console etc.  This post goes over how to access the iLO interface when newer browsers such as Chrome, FireFox and Edge don't support […]

ipa-client-install missing reverse records

For each reverse zone, when manually created, such as: DNS Zone: 0.168.192.in-addr.arpa. or DNS Zone: 0.0.10.in-addr.arpa. for example, in order for FreeIPA to create reverse records, the option: Dynamic Update must be set to True in the reverse zone Settings tab.  If not enabled, messages such as these will be seen when installing clients using ipa-client-install: Hostname […]

DD-WRT: Network Performance Tuning

It became apparent that with the growing push for more content on web pages and general media content, my router began to perform rather inadequately.  Inadequately to the point where it was rebooting spontaneously.  Below is what the situation looked like.  Below is an example of high SIRQ's inundating the environment:  Mem: 116784K used, 396932K free, […]

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