SIEM stands for security information and event management and provides organizations with next-generation detection, analytics and response.
SIEM software combines security information management (SIM) and security event management (SEM) to provide real-time analysis of security alerts generated by applications and network hardware.
SIEM software matches events against rules and analytics engines and indexes them for sub-second search to detect and analyze advanced threats using globally gathered intelligence.
This gives security teams both insight into and a track record of the activities within their IT environment by providing data analysis, event correlation, aggregation, reporting and log management.
SIEM software can have a number of features and benefits, including:
- Consolidation of multiple data points
- Custom dashboards and alert workflow management
- Integration with other products
How does SIEM work? SIEM software works by collecting log and event data generated by an organizations applications, security devices and host systems and bringing it together into a single centralized platform. SIEM gathers data from antivirus events, firewall logs and other locations; it sorts this data into categories, for example: malware activity and failed and successful logins. When SIEM identifies a threat through network security monitoring, it generates an alert and defines a threat level based on predetermined rules.
For example, someone trying to log into an account 10 times in 10 minutes is ok, while 100 times in 10 minutes might be flagged as an attempted attack. In this way it detects threats and creates security alerts.
SIEM use in compliance. Tighter compliance regulations are pushing businesses to invest more heavily in IT security and SIEM plays an important role, helping organizations comply with PCI DSS, GDPR, HIPAA and SOX standards. IoT security. The Internet of Things (IoT) market is growing. Most IoT solution vendors provide API and external data repositories that can be easily integrated into SIEM solutions. Prevention of insider threats. External threats aren’t the only things that make organizations vulnerable, insider threats pose a considerable risk, especially considering the ease of access. SIEM software allows organizations to continuously monitor employee actions and create alerts for irregular events based on ‘normal’ activity.
DNS filtering gives you the ability to filter bad or unwanted content at the DNS level. DNS filtering works by categorizing every single domain you attempt to access and cross-referencing those categorizations and domain names with policies you've determined you want to block. If you want to block all social media sites and attempt to access a brand new social media site, you won't be able to because your policy will stop you.
First things first: What is DNS? You might not know it, but you use DNS every single day. DNS stands for Domain Name System. It’s often referred to as the phonebook of the internet. When you want to visit a website, you type in the domain name of the site and get there pretty much instantaneously. But what you’re really doing is asking a DNS server “What is the IP address of Facebook.com?” The DNS server responds with the IP address and takes you to Facebook.
DNS translates the domain name into an IP address for us, so we don’t have to memorize a long number. If DNS is the phonebook, think of DNS filtering as a caller ID system that can enable call blocking. Businesses put DNS filters in place to block employees or guest Wi-Fi users from specific sites. A business might choose to block social media sites during work hours for their employees or illegal content for both employees and public Wi-Fi guests. A DNS filtering system will always block users from malicious content.
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DNS Filtering and SIEM
DNS filtering is like a caller ID system that can enable call blocking. SIEM identifies a threat through network security monitoring, generates an alert and defines a threat level based on predetermined by you rules.
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