Why are "ERR Couldn't start tunnel error="lookup protocol.argotunnel.com on 8.8.8.8:53" errors prompted?

[pospos369]

Why does the following error appear?
2021-06-03T03:06:06Z ERR Couldn't start tunnel error="lookup protocol.argotunnel.com on 8.8.8.8:53: read udp x.x.x.x:53135->8.8.8.8:53: no such host"
lookup protocol.argotunnel.com on 8.8.8.8:53: read udp x.x.x.x:53135->8.8.8.8:53: no such host

[nalakawula]

I also got the same error

2021-06-22T01:24:50Z ERR update check failed error="no release found"
2021-06-22T01:25:14Z ERR Couldn't start tunnel error="lookup protocol.argotunnel.com on 8.8.4.4:53: read udp 10.0.13.76:47803->8.8.4.4:53: i/o timeout"
lookup protocol.argotunnel.com on 8.8.4.4:53: read udp 10.0.13.76:47803->8.8.4.4:53: i/o timeout

[araczkowski]

in my case

 ERR Couldn't start tunnel error="lookup protocol.argotunnel.com on [::1]:53: read udp [::1]:57267->[::1]:53: read: connection refused"
89|tunnel  | lookup protocol.argotunnel.com on [::1]:53: read udp [::1]:57267->[::1]:53: read: connection refused

it happens only if I'm using named tunnel via config.yaml (new recommended way)

on the same device in legacy mode all is OK, any idea how to fix this???

Thx

[nmldiegues]

Hello everyone,

Could you let us know what's the output of:

dig -t txt protocol.argotunnel.com

(or equivalent, depending on your OS)

[nmldiegues]

This is the same as #423

[Zibri]

Reason: dns TXT records are sometimes filtered (here they are for example)

Solution:
use an https dns in cloudflared or try different dns records like SRV as a backup.

[araczkowski]

Hello @nmldiegues

this is the output of dig -t txt protocol.argotunnel.com

~ $ dig -t txt protocol.argotunnel.com

; <<>> DiG 9.16.11 <<>> -t txt protocol.argotunnel.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4007
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;protocol.argotunnel.com.	IN	TXT

;; ANSWER SECTION:
protocol.argotunnel.com. 299	IN	TXT	"http2=100"

;; Query time: 68 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Sat Jul 31 09:27:46 CEST 2021
;; MSG SIZE  rcvd: 74

Please let me know if I should check or do something more. Thanks!

[nmldiegues]

Hello,

We have released https://github.com/cloudflare/cloudflared/releases/tag/2021.8.0 with two fixes related to this thread:

• Prevent tunnel from running accidentally when only proxy-dns should run
• Tolerate protocol TXT record lookup failing

Thanks for all the reports!

[araczkowski]

thank you - it works now :)