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sidebar_position: 25
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# TCP and UDP Tunnels
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`zrok` includes support for sharing low-level TCP and UDP network resources using the `tcpTunnel` and `udpTunnel` backend modes.
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As of version `v0.4` , `zrok` supports sharing TCP and UDP network resources using `private` sharing.
To share a raw network resource using `zrok` , you'll want to use the `zrok share private` command from your `enable` -d environment, like this:
```
$ zrok share private --backend-mode tcpTunnel 192.168.9.1:22
```
This will result in a share client starting, which looks like this:
```
╭───────────────────────────────────────────────────────────╮╭──────────────────────────╮
│ access your share with: zrok access private 5adagwfl888k ││ [PRIVATE] [TCPTUNNEL] │
╰───────────────────────────────────────────────────────────╯╰──────────────────────────╯
╭───────────────────────────────────────────────────────────────────────────────────────╮
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
╰───────────────────────────────────────────────────────────────────────────────────────╯
```
Then on the system where you want to access your shared resource (an SSH endpoint in this case), you'll need an `enable` -d `zrok` environment. Run the following command (shown in the banner at the top of the `zrok share` client above):
```
$ zrok access private 5adagwfl888k
```
This will start an `access` client on this system:
```
╭───────────────────────────────────────────────────────────────────────────────────────╮
│ tcp://127.0.0.1:9191 -> 5adagwfl888k │
╰───────────────────────────────────────────────────────────────────────────────────────╯
╭───────────────────────────────────────────────────────────────────────────────────────╮
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
╰───────────────────────────────────────────────────────────────────────────────────────╯
```
The `access` client shows the endpoint at the top where the service can be accessed. In this case, you'll want to connect your SSH client to `127.0.0.1:9191` . We'll just use `nc` (netcat) to access the shared TCP port:
```
$ nc 127.0.0.1 9191
SSH-2.0-OpenSSH_9.2 FreeBSD-openssh-portable-9.2.p1,1
```
And both the `share` client and the `access` client show the traffic:
```
╭───────────────────────────────────────────────────────────╮╭──────────────────────────╮
│ access your share with: zrok access private 5adagwfl888k ││ [PRIVATE] [TCPTUNNEL] │
╰───────────────────────────────────────────────────────────╯╰──────────────────────────╯
╭───────────────────────────────────────────────────────────────────────────────────────╮
│Friday, 23-Jun-23 15:33:10 EDT ziti-edge-router │
│connId=2147483648, logical=ziti- │
│sdk[router=tls:ziti-lx:3022] -> ACCEPT 192.168.9.1:22 │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
╰───────────────────────────────────────────────────────────────────────────────────────╯
```
```
╭───────────────────────────────────────────────────────────────────────────────────────╮
│ tcp://127.0.0.1:9191 -> 5adagwfl888k │
╰───────────────────────────────────────────────────────────────────────────────────────╯
╭───────────────────────────────────────────────────────────────────────────────────────╮
│Friday, 23-Jun-23 15:33:10 EDT 127.0.0.1:42312 -> ACCEPT 5adagwfl888k │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
╰───────────────────────────────────────────────────────────────────────────────────────╯
```
Exit the `access` client to remove the local access to the shared TCP port. Exit the `share` client to disable further accesses to the shared resource.
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For UDP network resources just use the `zrok share private --backend-mode udpTunnel` instead of `tcpTunnel` .
