Blog Posts in July 2020
Robert Graham wrote a great article explaining why CEOs don’t care much about cybersecurity or any other non-core infrastructure (including networking, unless you happen to be working for a service provider). It’s a must-read if you want to understand the **** you have to deal with in enterprise environments.
Every now and then a security researcher “discovers” a tunneling protocol designed to be used over a protected transport core and “declares it vulnerable” assuming the attacker can connect to that transport network… even though the protocol was purposefully designed that way, and everyone with a bit of clue knew the whole story years ago (and/or it’s even documented in the RFC).
It was MPLS decades ago, then VXLAN a few years ago, and now someone “found” a “high-impact vulnerability” in GPRS Tunnel Protocol. Recommended countermeasures: whitelist-based IP filtering. Yeah, it’s amazing what a wonderful new tool they found.
Unfortunately (for the rest of us), common sense never generated headlines on Hacker News (or anywhere else).
I wish I found it years ago…
Snir David wrote a great article explaining why you should focus on documenting stuff you do instead of solving other people’s challenges (or putting out fires) on Slack/Zoom/whatever. Enjoy ;)
Here’s one of the weirdest ideas I’ve found recently: patch together two dangling ends of virtual Ethernet cables with PBR.
To be fair, Jon Langemak used that example to demonstrate how powerful tc could be. It’s always fun to see a totally-unexpected aspect of Linux networking… even though it looks like the creators of those tools believed in Perl mentality of creating a gazillion variants of line noise to get the job done.