Anti-raid shield with
Automatic storm mode
When dozens of accounts flood into your group at once, every second counts. Telm detects the surge instantly, switches the chat into storm mode — lockdown, mandatory captcha, muted join noise — warns you personally, and lifts everything by itself once the wave passes.
- Surge detection in real time
- Automatic lockdown
- Self-restoring permissions
What the shield does
Join-surge detection
The shield watches how fast new accounts join. A configurable spike — dozens of joins within a short window — flips the group into storm mode automatically, day or night.
Storm mode lockdown
During a raid the chat is temporarily locked down: newcomers must pass captcha, welcome messages are suppressed so raiders get no airtime, and the flood dies before members even notice.
Personal owner alert
You get a direct message from the bot the moment a raid starts — with what triggered it and what the shield is doing. Manual override commands /raidon and /raidoff are always available.
Snapshot and auto-restore
Before locking anything, the shield snapshots your chat's permissions. When the wave passes, everything is restored exactly as it was — no forgotten restrictions, no cleanup afterwards.
A raid's timeline — from spike to recovery
Why communities trust the shield
- A raid becomes a log line - what used to be an hour of panic — banning bots one by one at 3 AM — is now an automatic episode you read about in the morning report.
- Real members are untouched - existing members keep chatting through the whole episode; only newcomers pass extra verification while storm mode is active.
- You stay in control - thresholds and windows are configurable per group, and /raidon//raidoff let you trigger or lift the lockdown manually at any time.
How storm mode wins against bot raids
A raid is an economics problem for the attacker: they need cheap, fast access to your members before anyone reacts. Storm mode destroys that economics. The moment joins spike, newcomers hit a captcha wall, their messages are muted, and welcome announcements go silent — so the raid buys the attacker nothing. Because it's automatic, the response time is seconds, not 'whenever an admin wakes up'.
The shield is also careful about your group's normal life. It snapshots chat permissions before changing anything and restores them precisely when the surge ends — verified by a background sweeper, so a network hiccup can't leave your group locked. Legitimate newcomers who arrive during a storm simply solve a captcha and join normally once the wave passes.
Frequently asked questions
How fast does the shield react to a raid?
Within seconds of the join-rate threshold being crossed. Detection, lockdown, captcha enforcement and the owner alert are all automatic — no admin needs to be online.
Will storm mode disturb my existing members?
No. Existing members keep full permissions and normal chat. Only accounts joining during the storm face extra verification, and the mode lifts itself automatically when the surge ends.
What if the shield triggers by mistake — say, after a viral post?
Genuine newcomers just solve a quick captcha and get in; nobody is banned by the shield itself. You can also lift storm mode instantly with /raidoff, and tune the join-rate threshold per group so viral growth never looks like a raid.
Can I trigger the lockdown manually?
Yes — /raidon flips storm mode on immediately, /raidoff lifts it. Useful when you see trouble coming before the automatic threshold fires.
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