marfillaster

TL;DR: IPv6-over-WireGuard relay — Vultr VPS + MikroTik

This paste assumes a Vultr Ubuntu cloud-compute instance with default Vultr-issued IPv6 and a home MikroTik RouterOS v7 in roughly the standard defconf state (LAN bridge, IPv6 firewall defconf rules). It gives the home LAN a globally routable IPv6 /64 over a WireGuard tunnel without NAT66 and without DHCPv6-PD.

If your VPS is on a different cloud, your home router is not MikroTik, or the LAN is not behind a single bridge, read the full guide and substitute. The validation report shows the actual end-to-end captures.

For the DNS-over-HTTPS + IPv6 RA RDNSS setup, use the companion DNS gist: https://gist.github.com/marfillaster/d34bd199b9e265ccd74af6d31fd9df85

Resulting layout after the paste:

marfillaster

cert-info.sh

cert-info.sh is a lightweight Bash utility for fetching and displaying SSL/TLS certificate details for one or more domains.
It supports both human-readable CSV output and structured JSON output, with options to override IP resolution globally or per-domain.

---

Features

• Retrieve SSL/TLS certificate details including:

marfillaster

Requirement

• USB flash drive - this is where the container filesystem will be persisted

Set-up docker bridge network

/interface bridge add name=docker

Set-up veth to be used by container

marfillaster

1. Go to Network - WAN - WAN Connection
2. Right click Type Route dropdown select and click "Inspect" in the context menu.
   In console, run the code below:

   document.getElementById('Frm_mode').options[document.getElementById('Frm_mode').options.selectedIndex].setAttribute('value', 'BRIDGE');
   Change_mode();
   

   
3. Input New Connection Name. Example: Bridge. Click Create.

marfillaster

• Main network on 192.168.88.0/24
• Guest network on 172.16.0.0/24 VLAN20
• UniFi AP is connected to a MikroTik router ether2 via DHCP assignment
• UniFi AP can be managed on via main network
• MikroTik initially on default configuration

/interface bridge port
add bridge=bridge interface=ether2

marfillaster

TL;DR: Default-Config Dual WAN PCC + Recursive Failover

This paste assumes a hardware MikroTik RouterBOARD with the standard MikroTik default config — hAP, hEX, RB5009-class, etc. — where ether1 is the WAN port and ether2 through etherN are LAN bridge ports. The paste removes ether2 from the LAN bridge and turns it into WAN2.

If your router is not in that default state — CHR, multi-WAN appliances, anything reconfigured, or anything where ether1 is not your WAN — read the full guide and substitute interface names. The lab report's §8.7 TL;DR validation shows the kind of remap CHR needs before this paste is safe.

Resulting layout after the paste:

WAN1 = ether1, DHCP

marfillaster

Generate key

brew install ykman yubico-piv-tool

# Generate key
ykman piv keys generate -aRSA2048 --pin-policy ONCE --touch-policy CACHED 9a public.pem


# Generate self signed key
ykman piv certificates generate -s "CN=yubi-1 ssh" -aSHA256 9a public.pem

marfillaster

Bridge mode

This guide will enable bridge mode in ethernet port 3 only. Wifi and ethernet ports 1 and 2 will remain in route mode.

Use cases:

• Avoid double NAT.
• Improve WiFi performance by using dedicated and/or more modern equipment.

marfillaster

MikroTik RouterOS v7: DoH + IPv6 RA RDNSS with ULA DNS

Self-contained paste for a RouterOS v7 LAN that already has IPv6 SLAAC working. It makes the router the LAN DNS resolver, sends upstream DNS through Cloudflare DoH, advertises the router's ULA as DNS via RA RDNSS, and stops DHCPv4 from advertising 192.168.88.1 as DNS while keeping admin@192.168.88.1 management working.

DNS companion/update for: https://gist.github.com/marfillaster/a80d378124db0d879a962ce73d31b345

Replace:

• <LAN_BRIDGE> with your LAN bridge, usually bridge
• <LAN_GUA> with the router's LAN GUA, for example 2001:db8:1:1::1

marfillaster

Keybase proof

I hereby claim:

• I am marfillaster on github.
• I am marfillaster (https://keybase.io/marfillaster) on keybase.
• I have a public key whose fingerprint is 9828 F7AA 8E16 009E A8FB 5913 3798 FD80 20D3 229E

To claim this, I am signing this object: