# FAQ

Last validated Aug 22, 2025

## Getting started

* [What is Tailscale?][kb-what-is-tailscale]
* [What is a tailnet?][kb-tailnet]
* [What are these `100.x.y.z` addresses?][kb-100.x-addresses]

## Deploying Tailscale

* [Can I use Tailscale alongside other VPNs?][kb-other-vpns]
* [I can't install Tailscale. How can I connect?][kb-devices-without-tailscale]
* [What firewall ports should I open to use Tailscale?][kb-firewall-ports]

## Reliability

* [What happens if the coordination server is down?][kb-what-happens-coordination-server-down]
* [Is my traffic routed through your servers?][kb-routed-through-tailscale]

Explore more about [how Tailscale works][bl-how-tailscale-works].

## Security and privacy

* [Can Tailscale decrypt my traffic?][kb-can-tailscale-decrypt-my-traffic]
* [If I use Tailscale on my work device, will my personal devices be visible to my co-workers?][kb-device-visibility]

Explore more about [Tailscale security][co-security].

## Other

* [Does Tailscale support IPv6?][kb-ipv6]
* [Why is MagicDNS fetching records on port `433`?][kb-dns-over-https]
* [Do admin console sessions expire?][kb-admin-console-session-expiry]
* [What is STUN?][kb-what-is-stun]

[bl-how-tailscale-works]: /blog/how-tailscale-works

[co-security]: /security

[kb-100.x-addresses]: /docs/concepts/tailscale-ip-addresses

[kb-admin-console-session-expiry]: /docs/reference/admin-console-session-expiry

[kb-can-tailscale-decrypt-my-traffic]: /docs/concepts/can-tailscale-decrypt-traffic

[kb-device-visibility]: /docs/concepts/device-visibility

[kb-devices-without-tailscale]: /docs/reference/devices-without-tailscale

[kb-dns-over-https]: /docs/reference/faq/magicdns

[kb-firewall-ports]: /docs/reference/faq/firewall-ports

[kb-ipv6]: /docs/concepts/ipv6

[kb-other-vpns]: /docs/reference/faq/other-vpns

[kb-routed-through-tailscale]: /docs/concepts/traffic-routing-through-tailscale

[kb-tailnet]: /docs/concepts/tailnet

[kb-what-happens-coordination-server-down]: /docs/reference/coordination-server-down

[kb-what-is-stun]: /docs/reference/stun-protocol

[kb-what-is-tailscale]: /docs/concepts/what-is-tailscale