[GH-ISSUE #4760] virtual_net: init virtual network controller error: device or resource busy

gitea-mirror commented

2026-05-05 14:24:35 -06:00

Owner

Originally created by @synclab-srl on GitHub (Apr 18, 2025).
Original GitHub issue: https://github.com/fatedier/frp/issues/4760

Bug Description

Hi @fatedier

I am testing the functionality of virtual_network.

I have the following use case:

I have started two clients on two different remote machines.

When I try to start two visitors on my local laptop machine, I get the following error:

2025-04-18 14:45:47.985 [E] [client/service.go:180] init virtual network controller error: device or resource busy

This happens because the utun interface is busy with one of the two visitors.

It would be necessary for each visitors to open a different interface (utun0, utun1, utun2, utunN)

In this way from the same host it is possible to connect to different remote clients:

example:

100.85. 0.0/24 -> utun0
100.86. 1.0/24 -> utun1,
etc.

Thank you very much.

frpc Version

0.62.0

frps Version

0.62.0

System Architecture

linux/amd64

Configurations

VISITORS 1

serverAddr = "mydomain.net"

serverPort = 7835

auth.method = "token"
auth.token = "zzzzzz"

transport.protocol = "tcp"
transport.tls.enable = false

featureGates = { VirtualNet = true }
virtualNet.address = "100.90.0.2/24"

[[visitors]]
name = "vnet-t100ta-visitor"
type = "stcp"
serverName = "vnet01"
secretKey = "zzzzzz"
bindPort = -1
[visitors.plugin]
type = "virtual_net"
destinationIP = "100.90.0.1"

VISITORS 2

serverAddr = "mydomain.net"

serverPort = 7835

auth.method = "token"
auth.token = "zzzzzz"

transport.protocol = "tcp"
transport.tls.enable = false

featureGates = { VirtualNet = true }
virtualNet.address = "100.85.0.2/24"

[[visitors]]
name = "vnet-adiprint-visitor"
type = "stcp"
serverName = "vnet02"
secretKey = "zzzzzz"
bindPort = -1
[visitors.plugin]
type = "virtual_net"
destinationIP = "100.85.0.1"

Logs

2025-04-18 14:45:48.651 [E] [client/service.go:180] init virtual network controller error: device or resource busy

Steps to reproduce

...

Affected area

Docs
Installation
Performance and Scalability
Security
User Experience
Test and Release
Developer Infrastructure
Client Plugin
Server Plugin
Extensions
Others

Originally created by @synclab-srl on GitHub (Apr 18, 2025). Original GitHub issue: https://github.com/fatedier/frp/issues/4760 ### Bug Description Hi @fatedier I am testing the functionality of virtual_network. I have the following use case: I have started two clients on two different remote machines. When I try to start two visitors on my local laptop machine, I get the following error: ``` 2025-04-18 14:45:47.985 [E] [client/service.go:180] init virtual network controller error: device or resource busy ``` This happens because the utun interface is busy with one of the two visitors. It would be necessary for each visitors to open a different interface (utun0, utun1, utun2, utunN) In this way from the same host it is possible to connect to different remote clients: example: ``` 100.85. 0.0/24 -> utun0 100.86. 1.0/24 -> utun1, etc. ``` Thank you very much. ### frpc Version 0.62.0 ### frps Version 0.62.0 ### System Architecture linux/amd64 ### Configurations VISITORS 1 ``` serverAddr = "mydomain.net" serverPort = 7835 auth.method = "token" auth.token = "zzzzzz" transport.protocol = "tcp" transport.tls.enable = false featureGates = { VirtualNet = true } virtualNet.address = "100.90.0.2/24" [[visitors]] name = "vnet-t100ta-visitor" type = "stcp" serverName = "vnet01" secretKey = "zzzzzz" bindPort = -1 [visitors.plugin] type = "virtual_net" destinationIP = "100.90.0.1" ``` VISITORS 2 ``` serverAddr = "mydomain.net" serverPort = 7835 auth.method = "token" auth.token = "zzzzzz" transport.protocol = "tcp" transport.tls.enable = false featureGates = { VirtualNet = true } virtualNet.address = "100.85.0.2/24" [[visitors]] name = "vnet-adiprint-visitor" type = "stcp" serverName = "vnet02" secretKey = "zzzzzz" bindPort = -1 [visitors.plugin] type = "virtual_net" destinationIP = "100.85.0.1" ``` ### Logs ``` 2025-04-18 14:45:48.651 [E] [client/service.go:180] init virtual network controller error: device or resource busy ``` ### Steps to reproduce 1. 2. 3. ... ### Affected area - [ ] Docs - [ ] Installation - [ ] Performance and Scalability - [ ] Security - [ ] User Experience - [ ] Test and Release - [ ] Developer Infrastructure - [ ] Client Plugin - [ ] Server Plugin - [ ] Extensions - [ ] Others

gitea-mirror

2026-05-05 14:24:35 -06:00

closed this issue
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gitea-mirror commented

2026-05-05 14:24:37 -06:00

Author

Owner

@manprint commented on GitHub (Apr 29, 2025):

Seems to work in 0.62.1.
I'll do more testing in the next few days.
Thanks

@manprint commented on GitHub (Apr 29, 2025): Seems to work in 0.62.1. I'll do more testing in the next few days. Thanks