From the course: CompTIA CySA+ (CS0-002) Cert Prep: 5 Security Operations and Monitoring
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DKIM, DMARC, and SPF
From the course: CompTIA CySA+ (CS0-002) Cert Prep: 5 Security Operations and Monitoring
DKIM, DMARC, and SPF
- [Instructor] While email is inherently insecure, there are three protocols that we can deploy, that enhance the security of email messages. SPF, DKIM and DMARC. SPF, is the Sender Protection Framework. It's a fairly simple standard, that allows domain owners to specify the mail servers, that are allowed to send messages from their domains. This allows other mail servers to verify that messages they receive claiming to be from that domain, are legitimately from a server, authorized to send messages on behalf of that domain. Using SPF is fairly simple. You create a DNS record, that lists the servers that are allowed to send email for the domain. And those records are called unsurprisingly, SPF records. Let's take a look at the SPF records for domain. I'm going to use dig, to look up the SPF record for LinkedIn. I'll use dig and then we going to set the type to text, which will retrieve all of the text records associated,…
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