To help Tailscale make direct connections, consider opening a firewall port. In networks with Cisco firewalls, Tailscale nodes will have difficulties making direct connections, and often resort to DERP relays. In networks with Check Point firewalls, Tailscale nodes should be able to establish direct connections by default. You can also consider opening a firewall port. To modify this, increase the “Max UDP” parameter in your firewall configuration. To help Tailscale make direct connections, modify the maximum number of UDP sessions that a Barracuda firewall allows, making it easier for multiple Tailscale clients to connect, without competing with each other for UDP ports. In networks with Barracuda firewalls, Tailscale nodes will have difficulties making direct connections, and often resort to DERP relays. Tailscale can also be run directly on these routers, via a plugin for pfSense and via the For more details, see the instructions for Static NAT port mapping, and Universal Plug and Play (UPnP). However, there are options to allow direct connections, such as NAT Port Mapping Protocol (NAT-PMP), In networks with OPNsense and pfSense firewalls, Tailscale nodes will have difficulties making direct connections, and often resort to DERP relays. If you experience an issue with a firewall not listed here, or need help configuring a particular firewall with Tailscale, contact support. Increase Max UDP sessions, and open a firewall portĬisco with Cisco Umbrella Endpoint Securityįortinet with FortiGate deep packet inspectionĬreate a NAT policy to use a static IP addressįor other firewalls, if your connections are using DERP relays by default, try opening a port to establish a direct connection. Subscribe to this GitHub issue for updates on a Tailscale ruleset.Įnable NAT-PMP, or static NAT port mappings Restrict this traffic only to what is needed. By opening a firewall port, your network will allow traffic on a certain port and meeting certain rules to leave your network.By enabling NAT-PMP and UPnP, your network can allow in and forward all traffic.Before implementing any of these changes, consider if your organization wants to make this trade-off between security and latency. Although the workarounds below may help Tailscale to establish direct connectivity between nodes, these may also make it easier for other traffic to reach your network. Your organization may have configured a firewall to protect their network from unsolicited, unnecessary, or malicious traffic. To determine if a specific connection from your device to another device is using a relay, run: tailscale ping To determine which devices you are actively connected to and whether they connect directly or use a relay, run: tailscale status DERP relays are normally used as a side channel, to help initially establish a direct connection, but in some cases such as with more complex firewall configurations, are used to relay all traffic. Where this is not possible, Tailscale will use DERP relays to forward traffic from one node to another. Tailscale tries to connect your nodes directly peer to peer, and does so nearly all of the time. Tailscale will either connect your nodes directly or via a DERP relay. See below the list of known issues and workarounds for using Tailscale with your firewall provider. To get many firewalls working with Tailscale, try opening a firewall port to establish a direct connection.įor some firewalls, though, it is particularly difficult to establish a direct connection, so your traffic relies on DERP relay servers as a fallback, which may lead to slower connections. Thanks to NAT traversal, nodes in your tailnet can connect directly peer to peer, even through firewalls. Most of the time, Tailscale should work with your firewall out of the box.
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