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docs: fix jetbrains reconnect faq #12073

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Feb 9, 2024
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docs: fix jetbrains reconnect faq #12073

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docs: fix jetbrains reconnect faq
ericpaulsen Feb 9, 2024
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22 changes: 17 additions & 5 deletions docs/faqs.md
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Expand Up @@ -534,19 +534,31 @@ https://code.visualstudio.com/docs/remote/linux#_local-linux-prerequisites
<details style="margin-bottom: 28px;">
<summary style="font-size: larger; font-weight: bold;">How can I resolve disconnects when connected to Coder via JetBrains Gateway?</summary>

If you leave your JetBrains IDE open for some time while connected to Coder, you
may encounter a message similar to the below:
If your JetBrains IDE is disconnected for a long period of time due to a network
change (for example turning off a VPN), you may find that the IDE will not
reconnect once the network is re-established (for example turning a VPN back
on). When this happens a persistent message will appear similar to the below:

```console
No internet connection. Changes in the document might be lost. Trying to reconnect…
```

To resolve this, add this entry to your SSH host file on your local machine:
To resolve this, add this entry to your SSH config file on your local machine:

```console
Host coder-jetbrains--*
ServerAliveInterval 5
```

Note that your SSH config file will be overwritten by the JetBrains Gateway
client if it is re-authenticated to your Coder deployment.
This will make SSH check that it can contact the server every five seconds. If
it fails to do so `ServerAliveCountMax` times (3 by default for a total of 15
seconds) then it will close the connection which forces JetBrains to recreate
the hung session. You can tweak `ServerAliveInterval` and `ServerAliveCountMax`
to increase or decrease the total timeout.

Note that the JetBrains Gateway configuration blocks for each host in your SSH
config file will be overwritten by the JetBrains Gateway client when it
re-authenticates to your Coder deployment so you must add the above config as a
separate block and not add it to any existing ones.

</details>