Apr 23, 2025 · Apr 18, 2025 · Apr 23, 2025 · Apr 23, 2025
diff --git a/docs/admin/networking/troubleshooting.md b/docs/admin/networking/troubleshooting.md

 If a network interface on the side of either the client or agent has an MTU
 smaller than 1378, any direct connections form may have degraded quality or
 performance, as IP packets are fragmented. `coder ping` will indicate if this is
 the case by inspecting network interfaces on both the client and the workspace
 agent.
 might hang entirely.

 If another interface cannot be used, and the MTU cannot be changed, you may need
 to disable direct connections, and relay all traffic via DERP instead, which
 Use `coder ping` to check for MTU issues, as it inspects
 network interfaces on both the client and the workspace agent:

 ```console
 $ coder ping my-workspace
 ...
 Possible client-side issues with direct connection:

 - Network interface utun0 has MTU 1280 (less than 1378), which may degrade the quality of direct connections or render them unusable.
 ```

 If another interface cannot be used, and the MTU cannot be changed, you should
 disable direct connections and relay all traffic via DERP instead, which
 will not be affected by the low MTU.

 To disable direct connections, set the
 [`--block-direct-connections`](../../reference/cli/server.md#--block-direct-connections)
 flag or `CODER_BLOCK_DIRECT` environment variable on the Coder server.

 ## Throughput

 The `coder speedtest <workspace>` command measures the throughput between the
Original file line number	Diff line number	Diff line change
Expand Up		@@ -95,14 +95,27 @@ the NAT configuration, or deploy an internal STUN server.

		If a network interface on the side of either the client or agent has an MTU
		smaller than 1378, any direct connections form may have degraded quality or
		performance, as IP packets are fragmented. `coder ping` will indicate if this is
		the case by inspecting network interfaces on both the client and the workspace
		agent.
		might hang entirely.

		If another interface cannot be used, and the MTU cannot be changed, you may need
		to disable direct connections, and relay all traffic via DERP instead, which
		Use `coder ping` to check for MTU issues, as it inspects
		network interfaces on both the client and the workspace agent:

		```console
		$ coder ping my-workspace
		...
		Possible client-side issues with direct connection:

		- Network interface utun0 has MTU 1280 (less than 1378), which may degrade the quality of direct connections or render them unusable.
		```

		If another interface cannot be used, and the MTU cannot be changed, you should
		disable direct connections and relay all traffic via DERP instead, which
		will not be affected by the low MTU.

		To disable direct connections, set the
		[`--block-direct-connections`](../../reference/cli/server.md#--block-direct-connections)
		flag or `CODER_BLOCK_DIRECT` environment variable on the Coder server.

		## Throughput

		The `coder speedtest <workspace>` command measures the throughput between the
Expand Down