examen capitulo 8 ccna

examen capitulo 8 ccna.Some devices may send Syslog messages that are not RFC-compliant. This will result in log parsing errors or complete log parsing failure. In this case, a raw or plain text message needs to be used as input without any attempt at parsing. Graylog can accept data by input. Figure 11-9 shows Graylog's Inputs boundary409 Chapter 11 Network and Host Insight Techniquessurface and the various "inputs" that Graylog supports, including plain text, Syslog from various devices, and transport methods (TCP and UDP).Figure 11-9 Graylog Inputs Interface Figure 11.10 shows how to initiate a new SyslogUDP input. As you can see from Figure 11.10, this new Syslog instance is used to receive logs generated by the Cisco firewall and its listening port is set to UDP port 514.Figure 11-10 Initiating a New Syslog UDP Input in Graylog410 Chapter 11 Network and Host Insight Technologies3. Elasticsearch>Logstash and Kibana (ELK) Stack The Elasticsearch ELK Stack is a very powerful open source analytics platform. ELK is an acronym for Elasticsearch, Logstash, and Kibana.Elasticsearch is both the name of a distributed search and analytics engine and the name of the company created by the open people behind Elasticsearch and Apache Lucene. Elasticsearch is built on top of ApacheLucene, a high-performance search and information retrieval library written in Java. Elasticsearch is a schema-free full-text search engine that supports multiple languages and has features such as geolocation, suggestive search, auto-completion and fragment search.Logstash has various centralized log aggregation features, such as network infrastructure device log aggregation, monthly server log aggregation, and NetFlow aggregation. Logstash is written in the JRuby language and runs in the Java Virtual Machine (JVM) using a very simple message-based architecture. Logstash has a single agent, which can be configured to perform different functions in conjunction with other ELK components. The Logstash ecosystem consists of 4 major components.shipper: used to send events to Logstash. The remote agent typically only runs this component.