# DNS Issues Summary & Resolution

## Critical Issues Found in DNS Zone File

### Issue 1: Shared Tunnel Without Proper Configuration ⚠️ CRITICAL

**9 hostnames** pointing to tunnel `10ab22da-8ea3-4e2e-a896-27ece2211a05`:
- dbis-admin.d-bis.org
- dbis-api.d-bis.org
- dbis-api-2.d-bis.org
- mim4u.org.d-bis.org
- www.mim4u.org.d-bis.org
- rpc-http-prv.d-bis.org
- rpc-http-pub.d-bis.org
- rpc-ws-prv.d-bis.org
- rpc-ws-pub.d-bis.org

**Problem**: Tunnel likely doesn't have ingress rules for all hostnames, causing routing failures.

**Solution**: Run `./fix-shared-tunnel.sh` to create proper configuration.

### Issue 2: Extremely Low TTL Values ⚠️

All CNAME records have TTL of **1 second**.

**Problem**: 
- Aggressive DNS cache invalidation
- High DNS query load
- Potential resolution delays

**Solution**: Update TTL to 300 (5 min) or 3600 (1 hour) in Cloudflare Dashboard.

### Issue 3: Mixed Proxy Status ⚠️

Most records: `cf-proxied:true` (orange cloud)  
One record: `sip.d-bis.org` has `cf-proxied:false` (grey cloud)

**Impact**: Inconsistent security/protection.

## What's Working ✅

- Proxmox tunnels (ml110-01, r630-01, r630-02) - each has separate tunnel
- Explorer tunnel - separate tunnel ID
- External services (ipfs, tokens, etc.) - correctly configured

## Quick Fix

```bash
# 1. Fix tunnel configuration
./fix-shared-tunnel.sh

# 2. Update TTL in Cloudflare Dashboard
# Go to: DNS → Records → Edit each CNAME → TTL: 300

# 3. Verify
curl -I https://dbis-admin.d-bis.org
curl -I https://rpc-http-pub.d-bis.org
```

## Files Created

- `DNS_ANALYSIS.md` - Detailed DNS analysis
- `DNS_CONFLICT_RESOLUTION.md` - Complete resolution plan
- `fix-shared-tunnel.sh` - Automated fix script
- `DNS_ISSUES_SUMMARY.md` - This summary

