Marc Kranat

About Marc Kranat

CISM CISSP
Marc Kranat is Sucuri’s Enterprise Firewall Supervisor who joined the company in 2014. Marc’s main responsibilities include providing support to high-value clients. His professional experience covers over 20 years in cyber and IS security and project management. When Marc isn’t checking firewall logs and configurations, you might find him acting as an assistant to his photographer wife, or wranging his Husky. Connect with him on Twitter.

February 14, 2023Marc Kranat

Help! My Email Server Got B0rked & I Have Problems After Malware Infection!

The Sucuri Firewall functions as a reverse proxy. A simple change to your DNS settings is all it takes to thoroughly filter incoming traffic to sniff and parse out bad requests from the good ones. However, these DNS changes can affect connectivity to your mail…

January 10, 2023Marc Kranat

Bad Paths & The Importance of Using Valid URL Characters

To ensure that your web files and pages are accessible to a wide range of users with various different devices and operating systems, it’s important to use valid URL characters….

April 19, 2022Marc Kranat

Poodle and Doodle, FUD and the Sucuri WAF

On any given day, Sucuri sees thousands of clients go through the PCI compliance process. The requirements outlined by the Payment Card Industry Data Security Standards (PCI DSS) are mandatory…

February 12, 2021Marc Kranat

UCEPROTECT Scam: When RBLs Go Bad

What is a Realtime Blackhole List (RBL)? A Realtime Blackhole List (RBL) contains lists of email servers, domain names, and IP addresses that are associated with hosting, producing, forwarding or…

February 9, 2021Marc Kranat

Optimizing Performance and Behavior with WordPress and the Sucuri WAF

Aside from providing significant protection from a wide range of threats, the Sucuri WAF also acts as a CDN due to its caching capabilities and regional PoPs — often performing…

March 27, 2020Marc Kranat

VPN: A Key to Securing an Online Work Environment

The current COVID-19 epidemic is changing the way people work, rapidly moving to working remotely as I have done for 20 years. I am providing this advice for smaller businesses…

March 6, 2020Marc Kranat

PCI Compliance, Penetration Testing, and the Sucuri WAF

Our support team is often asked, “Can we test our site through the Sucuri Web Application Firewall?” The answer is always yes, with a caveat. Tests that are intended to…

February 17, 2020Marc Kranat

SSL Testing Methods

Not all SSL configurations on websites are equal, and a growing number push for HTTPS everywhere. There is an increasing demand to check and quantify that little padlock in your…

Targeted Phishing Against GoDaddy Customers

I do get a lot of phishing emails, we all do, but as security professionals we tend to recognize them immediately. Either the syntax is wrong, or it’s missing a…