Issue: Script was creating its own temporary ipset when CSF's chain_DENY
existed but didn't support timeouts. This caused IPs to be blocked in a
separate ipset instead of CSF's official blocking list.
Fix: Restructured IPset initialization to ALWAYS prefer CSF's chain_DENY
- chain_DENY exists → Use it (the authoritative CSF blocking ipset)
- chain_DENY doesn't exist → Create temporary ipset as fallback
- No ipset available → Fall back to CSF -td command
Benefits:
- All IPs blocked go to CSF's chain_DENY (standard blocking mechanism)
- CSF configuration/UI sees all blocks
- Better integration with CSF's deny list management
- 70+ IPs/sec can now be properly added to the known CSF block ipset
Testing:
- Verified ipset list chain_DENY detection
- Syntax validated
- Backward compatible with ipset without timeout support
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
cschantz
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