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114 lines
10 KiB
Markdown
114 lines
10 KiB
Markdown
---
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sidebar_position: 25
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---
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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.
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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:
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```
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$ zrok share private --backend-mode tcpTunnel 192.168.9.1:22
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```
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This will result in a share client starting, which looks like this:
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```
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╭───────────────────────────────────────────────────────────╮╭──────────────────────────╮
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│ access your share with: zrok access private 5adagwfl888k ││ [PRIVATE] [TCPTUNNEL] │
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╰───────────────────────────────────────────────────────────╯╰──────────────────────────╯
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╭───────────────────────────────────────────────────────────────────────────────────────╮
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│ │
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╰───────────────────────────────────────────────────────────────────────────────────────╯
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```
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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):
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```
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$ zrok access private 5adagwfl888k
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```
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This will start an `access` client on this system:
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```
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╭───────────────────────────────────────────────────────────────────────────────────────╮
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│ tcp://127.0.0.1:9191 -> 5adagwfl888k │
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╰───────────────────────────────────────────────────────────────────────────────────────╯
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╭───────────────────────────────────────────────────────────────────────────────────────╮
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│ │
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╰───────────────────────────────────────────────────────────────────────────────────────╯
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```
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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:
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```
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$ nc 127.0.0.1 9191
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SSH-2.0-OpenSSH_9.2 FreeBSD-openssh-portable-9.2.p1,1
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```
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And both the `share` client and the `access` client show the traffic:
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```
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╭───────────────────────────────────────────────────────────╮╭──────────────────────────╮
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│ access your share with: zrok access private 5adagwfl888k ││ [PRIVATE] [TCPTUNNEL] │
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╰───────────────────────────────────────────────────────────╯╰──────────────────────────╯
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╭───────────────────────────────────────────────────────────────────────────────────────╮
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│Friday, 23-Jun-23 15:33:10 EDT ziti-edge-router │
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│connId=2147483648, logical=ziti- │
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│sdk[router=tls:ziti-lx:3022] -> ACCEPT 192.168.9.1:22 │
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╰───────────────────────────────────────────────────────────────────────────────────────╯
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```
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```
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╭───────────────────────────────────────────────────────────────────────────────────────╮
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│ tcp://127.0.0.1:9191 -> 5adagwfl888k │
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╰───────────────────────────────────────────────────────────────────────────────────────╯
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╭───────────────────────────────────────────────────────────────────────────────────────╮
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│Friday, 23-Jun-23 15:33:10 EDT 127.0.0.1:42312 -> ACCEPT 5adagwfl888k │
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╰───────────────────────────────────────────────────────────────────────────────────────╯
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```
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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`.
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