Hackers Exploit N-central Flaws to Infect 21 Servers, Including 19 Running Hotfix 2

Your password is weak: how a brute force attack works (and how to defend yourself)

By José Ángel Maldonado Guzmán Imagine a bicycle lock with a 4-digit combination. How many possible combinations are there? Ten thousand: from 0000 to 9999.

• Brute force attack tries billions of combinations at once
• Password security depends on length and character set
• Unique, long phrases protect better than complex passwords

2h ago ·dev.to

How to fix "SPF permerror: too many DNS lookups"

SPF has a hard limit: checking your record may take no more than 10 DNS lookups . Go over it and the result is permerror , which many receivers treat as a failed SPF check, so your mail is more likely…

• SPF has strict 10 DNS lookup limit
• Exceeding limit causes permerror
• Causes mail to be flagged as failed SPF check

2h ago ·dev.to

Why High-Frequency Trading (HFT) Firms Still Rely on Bare Metal Over Cloud Servers

In High-Frequency Trading (HFT), speed is the actual product. A single millisecond delay dictates whether a strategy captures a profit or absorbs a loss.

2h ago ·dev.to

Platform Engineering for Service-Based Organizations

A consultant wraps up a Kubernetes migration task for a financial services client and moves to a new engagement. For the new client, he does the Kubernetes migration again, covering rebuilding CI/CD…

2h ago ·dev.to

505,000 Chinese characters, 3 MB APK: shipping a classical text as an offline reader

I have been writing a commentary on the Yijing (Book of Changes) for a while. It ended up at 72 sections, 505,000 non-whitespace Chinese characters, and 704 A4 pages.

• Yijing commentary expanded to 505,000 Chinese characters
• APK created with inlined font and WebView shell
• Content organized into 70 pages for easy navigation

2h ago ·dev.to

How to Add Booking to a Next.js App With a REST API (2026)

Originally published on opencals.com . The original stays updated; check it for the latest version. Adding a booking page to a Next.js app looks like a weekend project until you start it.

• Service catalog defines bookable items with details
• Real-time availability manages slots and conflicts
• Opencals API simplifies backend while controlling frontend

2h ago ·dev.to