// CATEGORY · HANS STUDY POSTS
Network Security
4 posts filed under Network Security. Practitioner technical writing by Hans Study, ordered most recent first.
Hardening HPE Aruba CX Switches Running AOS-CX: A Practical Baseline
A hardening baseline for HPE Aruba CX access and distribution switches on AOS-CX: SSH on the management VRF, AAA, SNMPv3, authenticated NTP, DHCP snooping, ARP ...
Hardening Cisco Catalyst Switches Running IOS-XE: A Practical Baseline
A working hardening baseline for Cisco Catalyst access and distribution switches on IOS-XE, from SSH-only management and SNMPv3 to DHCP snooping, DAI, and a bla...
I Checked the Front Doors of 4,450 Ontario Small Businesses. Most Were Open.
A week after the PHP2Shell bug, I looked at the public-facing side of 4,450 small businesses across seven regions of Southwest Ontario for the things I would fl...
The Firewall Did Its Job: What FortiBleed Was Really About
FortiBleed wasn't a firewall flaw. It was a pile of reused, never-rotated credentials with a brand name attached. The lesson is older than the headline....