VMware releases patches from time to time within each major version. Conventionally, in a standalone environment without vCenter, it was necessary to install VIB (VMware Infrastructure Bundle) with esxcli. However, since ESXi 6.5 has WebGU…

In Logstash, since the configured Config becomes effective as a whole, it becomes a single output setting with a simple setting. Therefore, it is possible to set multiple outputs by conditionally branching according to items with if. Based…

In Logstash, try setting the same as Fluentd (td-agent) forest plugin and copy combined. As a result, even if the log type and the sender increase, it is possible to simplify without adding the output setting every time. What to expect - S…

Kibana is available as a log visualization tool for Elasticsearch, but sometimes I want to create a dashboard with Grafana by combining data such as ZABBIX. As a starting point, describe how to link Elasticsearch as Grafana's data source. …

Visualize the Cisco ASA FW log with Fluentd (td-agnet), which is popular as a log collection tool. Logs received by Fuentd are indexed by ElasticSearch and visualized by Kibana. Fluentd plugin and settings Cisco ASA Logging Configuration F…

One of the functions that is hardly implemented while being requested by Kibana is export from the Discover screen. Github also has long been requested as an issue. github.com Among them, there are some people who provide function implemen…

Since the Cisco ASA is a security device, It does not support CDP/LLDP which collects information on neighboring NW devices. Information on the Cisco Support Community Several questions on ASA's CDP/LLDP compliance status are being made. T…

A problem occurred in the home lab's wireless AP Cisco Aironet AIR1131AG, in which the status of the Dot11Radio interface became reset after recovery from a power outage. The cause of the blackout was due to excess power supply capacity of…

I created a DNS name confirmation confirmation tool in Express + Node.js for API cooperation between servers. Since name resolution is performed on Node.js on the server, it is possible to check in the same environment as the actual applic…

I am building a DMZ in my home lab with the Cisco ASA 5505. In the case of a simple inside-outside setting, set the security level to inside: 100, outside: 0 and allow traffic from outside by FW and NAT. However, inclusion of the DMZ makes…

I had trouble communicating from the DMZ to the inside when I built a DMZ with ASA 5505 in my home laboratory. Components Cisco ASA 5505 (BASE License, Ver.9.2 (3)) Cisco Catalyst 2960 VMware ESXi Because ASA 5505 can not use VLAN trunk wi…

When I started using Ansible, the operation became slow when the setting amount became large. I solved the problem by dividing it, so make a note of the confirmation point. (CentOS 7.3 ansible 2.2.1.0) As a result, waiting for DNS timeout …

When setting the sorting rule in Outlook, AND / OR combination can not be done well if it is the usual setting. I will introduce the recommended settings especially when you want to use the OR condition. Microsoft Community Use header info…

Ubuntu is one of the major distributions of Linux and has a wide share in desktop applications. When installing various software, it is necessary to pay attention to the version of kernel in addition to the version of the OS itself. The co…

I sometimes want to check whether the published server is accessible from other server, and created a simple program with Express + Node.js. By doing this, you can check that you can not do it by itself, such as access confirmation to the …