NEW FEATURE: Auto-Fix Menu (Press 'f' key)
- Interactive menu to automatically apply security hardening
- Detects active attack patterns and offers contextual fixes
- Creates timestamped backups before making changes
- Verifies settings and skips if already configured
AUTO-FIX OPTIONS:
1. SYNFLOOD Protection (when DDoS detected):
- Automatically enables CSF SYNFLOOD protection
- Sets reasonable defaults: 100/s rate limit, 150 burst
- Restarts CSF to apply changes
- Only shows if not already enabled
2. SSH Hardening (when 5+ bruteforce attempts):
- Lowers LF_SSHD from default (5) to 3 failed attempts
- Also updates LF_SSHD_PERM if present
- Restarts LFD to apply changes
- Only shows if threshold > 3
3. CT_LIMIT Optimizer (always available):
- Runs existing optimize-ct-limit.sh script
- Prevents connection tracking exhaustion
INTELLIGENT RECOMMENDATION HIDING:
1. Blockable IP count now excludes already blocked IPs:
- Loads blocked_ips_cache into hash table for O(1) lookups
- After blocking IPs via 'b' menu, count updates correctly
- Shows "No IPs requiring immediate blocks" when all handled
2. Recommendations hide after being applied:
- SSH recommendation checks current LF_SSHD setting
- SYNFLOOD recommendation checks current SYNFLOOD status
- Only displays recommendations for issues not yet fixed
- Provides clear feedback about what's already secured
USER EXPERIENCE IMPROVEMENTS:
- Added 'f' key to keyboard controls help
- Updated quick actions bar to show Auto-Fix option
- Clear success messages after applying fixes
- Shows current settings before and after changes
- "Apply All" option to fix everything at once
- Graceful handling when CSF not installed
SECURITY BEST PRACTICES:
- All config changes create timestamped backups
- Validates settings before modifying
- Provides clear explanation of what each fix does
- Non-destructive - can be safely reversed from backups
cschantz
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