Notices by niconiconi (niconiconi@mk.absturztau.be), page 4

Congratulations, the screenshot showed that you've just passed the Internet Operator Competency Assessment Test of China, Level 1 (Learner, China in 2005). To obtain higher levels of certification, study the the following subjects:

Level 2 (Beginner, China in 2007): Upgrading all deployed network protocols to encrypted versions, not only TCP but DNS and TLS SNI. If no encrypted version is available, use heuristic filters to ignore spoofed results.
Level 3 (Technician, China in 2010): Implement an original tunneling protocol resistant to keyword Sniffing, TCP reset attacks, and active probing.
Level 4 (Professional, China in 2013): Design an anti-traffic policer to maintain high throughput under intentional QoS and packet loss. Assess its effectiveness for China Telecom, China Unicom to Hong Kong, Korea, Japan, Singapore, USA, and Russia.
Level 5 (Engineer, China in 2015): Run multi-city network congestion monitoring servers via ping and routreroute. Learn the topology of domestic and international network backbone using self-study materials of mixed quality, identify key ISPs with good peering and transit relationships using BGP Looking Glass.
Level 6 (Expert, 2000-2024, always ongoing): Develop an original exploit to disrupt or de-synchronize stateful firewalls, such as manipulating packet fragmentation bit, spoofing SYN, ACK, FIN, allowing the Great Firewall of China to ignore your traffic completely.

By completing these certifications, you would be able to surf the Internet and looking at GitHub source code and American cat pictures with confidence.

Q: What should you do after following AT&T tech archive's YouTube channel?

A: Press the Bell button.

Accidentally typed "FleeBSD" instead of FreeBSD. It's what happens if you run rm -rf / on your company server.

"The embedded Linux ecosystem on the mid to low end, is, if anything, worse than it was 11 years ago. Then we were seeing 5-7 year old kernels shipped, now it seems like 10+ years is more the norm. There’s “new” APs still shipping Linux 3.3.8 with a shiny gui. "LMAO :blobcatlul:

Just found my mail server's IPv6 address is listed as spam because someone else in the same /64 block is compromised. :woozypad: Fixed by requesting a personal /64 block from the VPS provider. This also allowed me to use publicly-routable IPv6 addresses for all clients behind my VPN. No more NAT.

@sigmasternchen@comfy.social RFC 1122 https://datatracker.ietf.org/doc/html/rfc1122IP addresses are not permitted to have the value 0 or -1 for any of the <Host-number>, <Network-number>, or <Subnet-number> fields [...] There is a class of hosts (4.2BSD Unix and its derivatives, but not 4.3BSD) that use non-standard broadcast address forms, substituting 0 for -1.

TIL IP address 0 in a subnet is reserved because 4.2BSD once used it as a broadcast address, it stopped being a thing even in 4.3BSD, but everyone copied 4.3BSD so it remains reserved today.

"Recipients who repeatedly send mailer daemon or vacation messages to list posters will be unsubscribed without warning. Correctly implemented vacation programs should not respond to mailing list postings."LMAO :blobcatlul:

@puniko Good meownyaaaaaaaaaaaaaa

@puniko meow meow meow meow meow

@puniko Good meownyaaaaaaaaa

@puniko @kura@hai.z0ne.social :nikoni1:

@kura@hai.z0ne.social @puniko@mk.absturztau.be It can be done. You "just" need to rewire every floor of all apartment buildings in the entire city by any means necessary (which is the national policy in China). If you apartment building is 50 years old, the end result will look like this, but at least your don't have to use the slow POTS to access the Internet anymore.

"Theoretically, the stress ahead of a sharp crack tip becomes infinite and cannot be used to describe the state around a crack."Every time you break a piece of glass, you can say you've just created a singularity.

How to be a 10x engineer.
...And how to be a 1000x engineer. #electronics

@puniko mew mew mew mew mew

Q: What kind of engineers do you need to design a high-impedance oscilloscope probe?

A: 10x engineers.

@pynk AWS is using Apple's locked-down machines as is so there are real engineering problems. Just shows how nasty Apple is, even if you have trillion dollars in your bank account you still don't get any special offer like a server version or an escape from the Apple jail. The real problem is that AWS made zero acknowledgment in the knowledge base for years... :woozy_nikoni:

Broken AWS macOS servers alert :woozy_aws: Many Intel Mac bare-metal servers (mac1.metal) are broken due to old incompatible firmware (AWS has a custom management system but firmware upgrade is broken right now). Apple Silicon Macs (mac2.metal) seem to work well. On Intel, use these supported versions only.

This firmware problem has existed a month or more, but is still completely undocumented to my best knowledge. It's a Gacha game right now: "pay $20 to allocate a server that can run macOS 13, for at least 24 hours (macOS EULA, thanks Apple!). If it doesn't work, pay $20 again and try another one..." I'm now trying to get refunded.

Yet another victim of AWS's "macOS machine won't boot due to outdated firmware" problem has reported it! :woozy_aws: They said they've lost "thousands of dollars and 2 weeks worth of man time" before figuring it out after seeing my posts. :woozypad: Unlike me who was having problems with Intel systems (mac1.metal), they were using Apple Silicon (mac2.metal) which I used before without problems - so they're not immune.

But we finally have a workaround: just run the upgrade yourself... First, get the machine booting by selecting an older macOS image, run macOS upgrades manually all the way to the latest version. Destroy the instance, wait until it finishes scrubbing. Relaunch an instance on the same host - now you can select a new macOS image and boot it up. https://www.reddit.com/r/MacOS/comments/131y9nz/comment/ke3nv7z/ #AWS