Default value for Wireguard port is 0 but help says 51820

[saule1508]

Describe the problem

When you install netbird, it creates a config file with a value of "WgPort" set to 0. When you do netbird up --help it says the default value for WireguardPort is 51820.

To Reproduce
Install netbird on linux then look at the generated config:

grep WgPort /var/lib/netbird/default.json
    "WgPort": 0,

type netbird up --help, it says

--wireguard-port uint16 WireGuard interface listening port (default 51820)

Expected behavior

I think after a first install of netbird the value should be 51820. But it takes this value of ConfigInput in client/internal/profilemanager/config.go which is a pointer to an Int and default to nil. It should probably initialize with the value of DefaultWgPort in client/iface/iface.go

Are you using NetBird Cloud?

no

NetBird version

58.0.2

Is any other VPN software installed?

no
Debug output

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Additional context

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Have you tried these troubleshooting steps?

• Reviewed client troubleshooting (if applicable)
• Checked for newer NetBird versions
• Searched for similar issues on GitHub (including closed ones)
• Restarted the NetBird client
• Disabled other VPN software
• Checked firewall settings

[nazarewk]

this is a bug introduced with the profiles feature that we're tracking internally, I'll make a note to update/close this issue when it's addressed

[saule1508]

this should fix it, will try next week: #4650

[NiklasRosenstein]

I don't see this explicitly stated in the issue, but it seems to me this causes WG to listen on another port. One of my nodes is having trouble after enabling a firewall that only permits ingress traffic on UDP/51820, and it is the node with "WgPort": 0.

Interestingly, both of my nodes run Netbird v0.59.11 and only one has "WgPort": 0 set in /var/lib/netbird/default.json. Presumably that is because this file was initialized with some buggy version of Netbird on one node and a not-buggy version on the other?

What is the recommended way to fix this?

[lixmal]

@NiklasRosenstein you're probably right about that.
You can correct the port directly in the config file or with

netbird down
netbird up --wireguard-port 51820