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fix: Guest VLAN internet - DNS pointed to non-existent IP

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Root cause: OPNsense DHCP and firewall rules referenced 10.4.2.129
for Pi-hole DNS, but that IP doesn't exist. Pi-hole is at 10.4.2.11.

Updated all references in OPNsense config.xml and documentation.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
kavren
2025-12-28 21:45:29 -05:00
parent 24728729f2
commit 1cfd87f450
2 changed files with 12 additions and 5 deletions
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7
docs/CHANGELOG.md
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@@ -4,6 +4,13 @@
## 2025-12-28 ## 2025-12-28
### Guest VLAN Internet Fix
- Fixed Guest VLAN (10.4.30.0/24) having no internet access
- Root cause: OPNsense DHCP and firewall rules referenced non-existent 10.4.2.129 for DNS
- Fix: Updated all DNS references in OPNsense config.xml from 10.4.2.129 to 10.4.2.11 (Pi-hole)
- Affected: DHCP DNS server settings for all VLANs, firewall DNS allow rules
- Guest clients need DHCP lease renewal to get correct DNS server
### RustDesk Server Deployment ### RustDesk Server Deployment
- Deployed RustDesk server LXC 129 on pm2 via ProxmoxVE helper script - Deployed RustDesk server LXC 129 on pm2 via ProxmoxVE helper script
- Configured static IP: 10.4.2.36 - Configured static IP: 10.4.2.36

10
docs/DECISIONS.md
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@@ -107,16 +107,16 @@ Unmanaged Gigabyte switches pass VLAN tags through (they just don't understand t
#### DHCP Configuration #### DHCP Configuration
All DHCP served by OPNsense: All DHCP served by OPNsense:
- LAN: 10.4.2.100-200, DNS: 10.4.2.129 (Pi-hole) - LAN: 10.4.2.100-200, DNS: 10.4.2.11 (Pi-hole)
- Trusted: 10.4.10.100-200, DNS: 10.4.2.129 - Trusted: 10.4.10.100-200, DNS: 10.4.2.11
- IoT: 10.4.20.100-200, DNS: 10.4.2.129 - IoT: 10.4.20.100-200, DNS: 10.4.2.11
- Guest: 10.4.30.100-200, DNS: 10.4.2.129 - Guest: 10.4.30.100-200, DNS: 10.4.2.11
#### OPNsense Firewall Rules (Implemented) #### OPNsense Firewall Rules (Implemented)
| Rule | Source | Destination | Action | | Rule | Source | Destination | Action |
|------|--------|-------------|--------| |------|--------|-------------|--------|
| Allow DNS | IoT/Guest | 10.4.2.129:53 | Pass | | Allow DNS | IoT/Guest | 10.4.2.11:53 | Pass |
| Block IoT→LAN | 10.4.20.0/24 | 10.4.2.0/24 | Block | | Block IoT→LAN | 10.4.20.0/24 | 10.4.2.0/24 | Block |
| Block Guest→LAN | 10.4.30.0/24 | 10.4.2.0/24 | Block | | Block Guest→LAN | 10.4.30.0/24 | 10.4.2.0/24 | Block |
| Block Guest→IoT | 10.4.30.0/24 | 10.4.20.0/24 | Block | | Block Guest→IoT | 10.4.30.0/24 | 10.4.20.0/24 | Block |