> For the complete documentation index, see [llms.txt](https://docs.parallels.com/landing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.parallels.com/landing/parallels-desktop-developers-guide/software-development-specific-functions-of-parallels-desktop/establishing-a-serial-connection-over-tcp.md).
# Establishing a Serial Connection over TCP
Both Arm and x86 versions support establishing a Serial port connection over TCP. Ports open on the host machine and do not depend on the guest VM's network settings.
{% hint style="info" %}
**Note**: You can find more information about setting up a Serial port on a Parallels VM in the respective [section](/landing/parallels-desktop-developers-guide/command-line-interface-utility/manage-virtual-machines-from-cli/virtual-machine-configuration-tasks/device-management/virtual-serial-port.md) of this guide.
{% endhint %}
Serial over TCP can be used for remote debugging of VMs. You will need to set up your VM as a Server if you want to debug it or as a Client if you want to use it to debug other machines. Begin by choosing New Socket from the Source drop-down menu and type in **tcp\://0.0.0.0:2020** for the Server role or **tcp\://127.0.0.1:2020** for the Client role. Use the Mode drop-down menu to choose the appropriate role. IPv6 is also supported, so you can set up the Server as **tcp\://\[::]:2020** and the Client as **tcp\://\[fe80::1023:163b:ef12:d40e%eth0]:2020**.
---
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