![]() ![]() To detect potential security events in a remote or hybrid workforce, you need security logs and unusual logon alerts. Remote employees are at a higher risk for credential theft attacks. To get the most out of your logs, you need alerts that provide you with the information that helps you rapidly detect threats. Instead of taking 20-30 minutes by building a search, you should be able to get answers within a few seconds, even if you’re reviewing historical data. Having prebuilt dashboards or searches around IPs or names will help you quickly find real-time or historical data. This not only makes investigations easier, but it lets you see things like what hosts an IP address talked to, bytes transmitted, and IP reputation. This means that you can set dashboards that give you visualizations for things like: Graylog Iluminate includes pre-built dashboards based on our schema. To get quick insights, you should start by setting up the dashboards to see the important information quickly. In either case, you want to set the right indexing times so that you can keep the data for as long as you need it while not overwhelming your storage capacity. In some cases, compliance requirements might make that 90 days. Generally, you only need to retain logs for 30 days. Now that you’ve parsed the data, you can review the logs more meaningfully. In Graylog, you can do this through pipeline rules and enrichment. This lets you break the big log message into smaller, easy-to-read fields. You want to normalize that data when you bring it in. Then you can break apart the log message and do additional checks.įor example, you might want to create a dashboard around a source IP that shows up no matter what firewall version you’re using. To make your log data useful, you need to normalize the data with a single, comparable format. Graylog Illuminate includes schema to help with this so that customers can create dashboards that give meaningful visibility. First, you want to put all the log files into a schema that normalizes data points into specific fields. ![]() Logging logs correctly means getting the right information coming in and depends on your firewall version. To mature your security, you need to start collecting, aggregating, correlating, and analyzing these logs as soon as possible. Securing your hybrid workforce will require becoming more comfortable with VPN and firewall logs. TIPS FOR GETTING STARTED WITH VPN AND FIREWALL LOG MANAGEMENT For example, Checkpoint uses OPSEC-LEA that requires a special agent to go off and query that to pull logs in. Many use the Syslog format, but some proprietary firewalls use others. ![]() IMPORTING LOGSįirewalls also use different protocols for importing them. Where you usually get 1 million logs, you’re not up to 5 million when in debug mode. However, if you put it to the debug level, you get a lot more data that exponentially grows your log data patterns. On some firewalls, like an ASA, if you log at the informational level, you get normal log messages, like buildups and teardowns. It becomes a constant battle to keep up with the new parsers and the new fields that firewall logs have. This means your current parsers might not get the data that you want. Palo Alto 9.0 log entries include more metadata fields and a new SD-WAN section. Cisco’s format differs from Palo Alto’s, but Palo Alto 8.0 also differs from Palo Alto 9.0. For example, right now, two of the most popular firewalls are Cisco ASA and Palo Alto. DIFFERENT LOG FORMATSĮach firewall has its own log format, and the format can change from version to version. Many VPN and firewall log monitoring problems are similar to log management in general. VPN and firewall log management gives real-time visibility into security risks. Virtual private networks (VPNs) help secure data, but they are also challenging to bring into your log monitoring and management strategy. With that in mind, you should start putting more robust cybersecurity controls in place to mitigate risk.
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