Seas0

Running multiple tailscaled instances with netfilter integration disabled

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This guide explains how to spawn multiple instances of tailscaled on a single system using a systemd.service(5) template and, optionally, customized configurations. By setting "netfilterMode": "off" in all configurations (or by manually configuring them using tailscale up --netfilter-mode off), you can connect to multiple Tailnets simultaneously without resorting to SOCKS proxy–based userspace networking, while preserving functionalities like Magic DNS integration with systemd-resolved (i.e. you can simutaneously have direct access to other machines in BOTH tailnets via their hostnames).

DISCLAIMER: This method completely disables Tailscale’s automatic (iptables/nftables) netfilter firewall rule creation and management. As firewall rules from an earlier tailscaled instance would be wiped out by a new one, potentially locking you out.

Eight1911

import math

# iterative cooley tukey fft for dyadics
def fft(v):
    n, h  = len(v), len(v) >> 1
    old, new = v[:], [0] * n
    sublen, stride = 1, n

    while sublen < n:
        stride >>= 1