Slow DNS resolv when netbird is up

[arthur-trt]

Describe the problem

Each request used with Netbird and an output node is very slow on MacOs (can't test on other OS). This seems to be due to time-consuming DNS resolution:

❯ netbird up ; sleep 5 ; httpstat https://console.scaleway.com/                                                           
Connected
Connected to 172.67.8.213:443 from 100.66.92.203:58487

HTTP/2 200 
date: Mon, 01 Jul 2024 13:01:03 GMT
content-type: text/html
last-modified: Mon, 01 Jul 2024 12:38:45 GMT
x-xss-protection: 1; mode=block
strict-transport-security: max-age=15552000
x-content-type-options: nosniff
referrer-policy: origin
x-frame-options: SAMEORIGIN
x-scw-version: e07552cad646bbd874a2cf6ad2dbd74856b82d58
x-scw-app-version: [email protected]
content-security-policy: frame-ancestors 'self' https://account.scaleway.com
cache-control: public, max-age=60, stale-while-revalidate=300, stale-if-error=86400
alt-svc: h3=":443"; ma=86400
cf-cache-status: REVALIDATED
server: cloudflare
cf-ray: 89c6951ebeb103f3-CDG

Body stored in: /var/folders/6r/545w1_bx7s58jf3nzk5tbj_w0000gp/T/tmprxn5qijm

  DNS Lookup   TCP Connection   TLS Handshake   Server Processing   Content Transfer
[   4493ms   |      838ms     |     167ms     |       162ms       |        1ms       ]
             |                |               |                   |                  |
    namelookup:4493ms         |               |                   |                  |
                        connect:5331ms        |                   |                  |
                                    pretransfer:5498ms            |                  |
                                                      starttransfer:5660ms           |
                                                                                 total:5661ms 

❯ netbird down ; sleep 5 ; httpstat https://console.scaleway.com/
Connected to 104.22.20.81:443 from 10.42.101.31:58508

HTTP/2 200 
date: Mon, 01 Jul 2024 13:01:13 GMT
content-type: text/html
last-modified: Mon, 01 Jul 2024 12:38:45 GMT
x-xss-protection: 1; mode=block
strict-transport-security: max-age=15552000
x-content-type-options: nosniff
referrer-policy: origin
x-frame-options: SAMEORIGIN
x-scw-version: e07552cad646bbd874a2cf6ad2dbd74856b82d58
x-scw-app-version: [email protected]
content-security-policy: frame-ancestors 'self' https://account.scaleway.com
cache-control: public, max-age=60, stale-while-revalidate=300, stale-if-error=86400
alt-svc: h3=":443"; ma=86400
cf-cache-status: HIT
age: 10
server: cloudflare
cf-ray: 89c695619a016fdc-CDG

Body stored in: /var/folders/6r/545w1_bx7s58jf3nzk5tbj_w0000gp/T/tmp7idbdhwe

  DNS Lookup   TCP Connection   TLS Handshake   Server Processing   Content Transfer
[    29ms    |       7ms      |     18ms      |       17ms        |        0ms       ]
             |                |               |                   |                  |
    namelookup:29ms           |               |                   |                  |
                        connect:36ms          |                   |                  |
                                    pretransfer:54ms              |                  |
                                                      starttransfer:71ms             |
                                                                                 total:71ms   
                                                                                 

We use an exit node and a DNS configuration at netbird level applied to the group: "All".

Expected behavior

A clear and concise description of what you expected to happen.

Are you using NetBird Cloud?

SelfHosted Netbird

NetBird version

0.28.3

NetBird status -d output:

OS: darwin/arm64
Daemon version: 0.28.3
CLI version: 0.28.3
Management: Connected to https://netbird.lockself.com:443
Signal: Connected to https://netbird.lockself.com:443
Relays: 
  [stun:netbird.lockself.com:3478] is Available
  [turn:netbird.lockself.com:3478?transport=udp] is Available
Nameservers: 
  [1.1.1.1:53, 1.0.0.1:53] for [.] is Available
FQDN: arthurs-macbook-air.netbird.selfhosted
NetBird IP: 100.66.92.203/16
Interface type: Userspace
Quantum resistance: false
Routes: -
Peers count: 5/6 Connected

(I'm don't think peer details is revelant here, but if you need it i can send it)

Additional context

Dig query time seems quick:

❯ dig A console.scaleway.com

; <<>> DiG 9.10.6 <<>> A console.scaleway.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 64385
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;console.scaleway.com.          IN      A

;; ANSWER SECTION:
console.scaleway.com.   600     IN      CNAME   console.scaleway.com.cdn.cloudflare.net.
console.scaleway.com.cdn.cloudflare.net. 300 IN A 104.22.20.81
console.scaleway.com.cdn.cloudflare.net. 300 IN A 104.22.21.81
console.scaleway.com.cdn.cloudflare.net. 300 IN A 172.67.8.213

;; Query time: 44 msec
;; SERVER: 100.66.255.254#53(100.66.255.254)
;; WHEN: Mon Jul 01 15:11:48 CEST 2024
;; MSG SIZE  rcvd: 287