Do you currently use, or have you used in the past, any computer security measures? If so, what do you use? If not, what measures would you consider using? What attacks are you trying to protect against?
I have been in the technology field for 25 years, a large portion of that time as a storage architect and software developer. I use technologies like firewalls (Cisco ASA, Palo Alto Networks, and tons of open source solutions like iptables, pfsense, monowall, smoothwall, opnsense, etc…) to secure external services, locking services down to allowed IP ranges and in some case specific origin IP addresses, opening specific protocols and ports, NATing, proxying and reverse-proxying traffic (NGINX) all in an effort to obfuscate and reduce the attack surface. I use protocols like ssh and sftp to encrypt communication between client and servers. I use MD5 hashes to quickly validate binaries (and other files) to ensure that the files have not been tampered with. I use more obscure technologies like port knocking to programmatically secure ports when they need to be exposed but establishing a VPN connection is overly cumbersome. I use NIDS (network intrusion detection systems) like Snort in combination with the ELK stack to gather data and perform analytics to identify threats. I use RSA keys and multi-factor authentication (MFA) every day for everything from ssh access using key pairs instead of password authentication to IPSec and OpenVPN VPN connections which require multi-factor authentication via RSA tokens, Google Authenticator, Duo, etc… I also use AES-256 encryption data-at-rest-encryption (D@RE) technologies, RAID and erasure coding which all protect data at rest.
I also use so many of the tools found on this site: http://sectools.org/ on a routine basis. I use Nmap and Wireshark almost daily for network and protocol analysis. I also routinely run scheduled vulnerability tests using a subscription service from Beyond Security to identify and alert on vulnerabilities on public facing web servers. All of my Linux servers run Lynis daily to evaluate their security posture and publish reports which are sent to a system which parses the reports and produces an exception report which is distributed outlining any required remediation. I also am an aspiring ethical hacker who frequently uses Kali Linux and Pentoo Linux depending on what I am trying to do, Kali Linux is my go to, but Pentoo is nice for RF hacking. I am an avid watcher of Hak5, reader, and listener of 2600 and have been for many, many years. I am the proud owner of a WiFi Pineapple, many homemade antennas, the USB Rubber Ducky and the HackRF One. 🙂
I am just scratching the surface here; it seems like I could go on forever but hopefully, this provides a reasonable level of detail and insight. Oh yeah, I use Anti-Virus (AV) software for that false sense of security but mostly just to slow my Windows desktop down. 🙂
Here are some of my objectives:
- Identify vulnerabilities and remediate before the bad guys do.
- Reduce my attack surface as much as possible. Don’t want to be a honeypot on the internet, no point in enticing a script kiddie to target me. For instance, don’t allow your publicly accessible server to respond to ICMP so that when your neighbors inquisitive kid does a subnet scan he decides to target you, if you’re gonna stick a server directly on the internet and allow ssh don’t use port 22, don’t ever use WEP on your WiFi access point, etc… etc…
- I love to learn and research things (hence why I own a WiFi Pineapple, Rubber Ducky, HackRF One, etc…). The more I know the better I can protect my assets.
Since this is a security class, I’ll leave you with one of my favorite websites: http://map.norsecorp.com/#/
Pfleeger, C. P., Pfleeger, S. L., & Margulies, J. (2015). Security in computing (5th ed.). Upper Saddle River: Prentice Hall.