New post every day

NetSec Daily — One network security deep-dive, every day

Real configs. Real CVEs. Real scenarios. Written for practicing engineers, not for content marketing. No fluff, no sponsors, no AI word salad.

Subscribe on Telegram →
Free forever · @netsecdaily · Unsubscribe any time

What you get, every week

Seven themes, one per day. Every post is short, technical, and immediately useful.

Mon
Flashcards
Rapid-fire concept drills — ACLs, routing, NAT, QoS, VPN. The stuff interviewers ask.
Tue
CVE Alerts
This week's worst network-gear CVEs — Cisco, Palo Alto, Fortinet. CVSS, affected versions, mitigation.
Wed
Deep Dives
One protocol or architecture pattern explained properly. BGP quirks, MPLS internals, SD-WAN overlays.
Thu
Quizzes
Scenario-based questions. CCNP/CCIE/PCNSE flavor. Answers posted the next morning.
Fri
War Stories
Real outages, real fixes. Root causes the vendor docs won't tell you about.
Sat
Brain Teasers
Odd subnet math, routing puzzles, packet-capture riddles. Bring coffee.
Sun
Cheat Sheets
One printable reference a week. Subnet masks, TCP flags, OSPF states, ASIC forwarding paths.

Recent posts

A taste of what lands in your Telegram every morning.

Wed
Deep Dive
Why BGP keepalives are 60s and hold-timer is 180s — and why changing it breaks peering
Tue
CVE Alert
Cisco ASA/FTD critical RCE (CVE-2026-20XYZ) — what's vulnerable, what's not, how to patch
Mon
Flashcards
10 questions on OSPF LSA types — Type 1 through Type 11, what each does, where you'll see them
Sun
Cheat Sheet
TCP flag combinations — SYN, SYN-ACK, FIN-ACK, RST — what each signals in a capture
Fri
War Story
How a 2-byte MTU mismatch took down a core datacenter for 4 hours — and what the monitoring missed
Thu
Quiz
Your OSPF adjacency is stuck in EXSTART — 4 likely causes, ranked by probability. Pick one.
Sat
Brain Teaser
You have three /24s to summarize. Can you find the smallest single prefix that covers all three and nothing else?

Questions

The short answers.

Is this actually free?
Yes. No paywall, no Pro tier, no "upgrade for more." Everything goes to the public Telegram channel. We run NetArchAI as the paid product; the daily channel exists to show our work and help the community.
Who writes it?
NetSec Daily is produced by the NetArchAI team. Every post is grounded in verified facts and real configs — no AI hallucinations, no rehashed blog content, no sponsors.
How often do posts land?
Once a day, roughly 07:00 IST. If we miss a day, we don't backfill with filler — you get the next day's post on its normal schedule.
Can I unsubscribe?
Yes — Telegram's standard "Leave channel" is one tap. We don't collect your email, phone, or anything else when you subscribe. Nothing to opt out of beyond the channel itself.
I don't use Telegram. Other options?
Right now, Telegram only. If enough people ask for an email mirror or RSS, we'll add one. Write to support@netarchai.com and we'll know there's demand.
Can I suggest topics?
Please do — reply in the channel or email support@netarchai.com. War stories and tricky production incidents especially welcome; we'll anonymize before posting.

Start tomorrow morning.

One post a day. Flashcards Monday, war stories Friday, cheat sheet Sunday. Built for engineers who still read docs.

Subscribe on Telegram →