GITBOOK-577: Add Netcheck tool

SUMMARY.md

@@ -80,5 +80,6 @@
 
 * [FAQs](miscellaneous/faqs.md)
 * [Features](miscellaneous/feature-list-by-platform.md)
-* [Troubleshooting](miscellaneous/troubleshooting.md)
+* [Troubleshooting](miscellaneous/troubleshooting/README.md)
+  * [AnySync Netcheck Tool](miscellaneous/troubleshooting/anysync-netcheck-tool.md)
 * [Beta Migration](miscellaneous/migration-from-the-legacy-app.md)

miscellaneous/troubleshooting/anysync-netcheck-tool.md

@@ -0,0 +1,47 @@
+# AnySync Netcheck Tool
+
+A simple tool that checks the ability to connect to Anytype nodes. It was created to test network and TLS (sync) issues.
+
+The _Netcheck_ Tool opens a connection to the coordinator nodes to establish communication with the libp2p protocol and _AnySync_ handshakes, to attempt to execute network configuration requests.
+
+***
+
+### Download <a href="#p-42130-download-2" id="p-42130-download-2"></a>
+
+You can download the version for your OS here:
+
+{% embed url="https://github.com/anyproto/any-sync-tools/releases" %}
+
+The .zip contains all our tools, but the sync check procedure requires only **“any-sync-netcheck”**.\
+(The other file is our [self-hosting tool](https://github.com/anyproto/any-sync-tools/blob/main/any-sync-network/README.md).)
+
+### Installation <a href="#p-42130-installation-3" id="p-42130-installation-3"></a>
+
+**Build from source:**
+
+`go install github.com/anyproto/any-sync-tools/any-sync-netcheck@latest`
+
+***
+
+#### Running The Tool <a href="#p-42130-runing-the-tool-5" id="p-42130-runing-the-tool-5"></a>
+
+Execute the file named:
+
+* `any-sync-netcheck`
+* _or_ `any-sync-netcheck -v` for a verbose output
+
+***
+
+#### Result <a href="#p-42130-result-6" id="p-42130-result-6"></a>
+
+*   If your sync is **working as expected**, your output log should look something like this:\
+
+
+    <figure><img src="../../.gitbook/assets/Screenshot 2023-08-02 at 16.40.02.png" alt=""><figcaption></figcaption></figure>
+* **If the tool detects any errors:** please provide all details about your network setup, including VPN, proxy, firewalls, and antivirus. In this event, we may request you to run a trace-route or other system tools for further analysis later on.
+
+***
+
+#### Send to Anyteam <a href="#p-42130-send-to-anyteam-7" id="p-42130-send-to-anyteam-7"></a>
+
+Send the resulting log and your network specs to [support@anytype.io](mailto:support@anytype.io).