Cloudflared on docker - synlogy

Website, Application, Performance Argo
1

Hello

I am trying to activate the Cloudflare tunnel using docker on my synology.
when running the command

docker run cloudflare/cloudflared:latest tunnel --no-autoupdate run --token myToken

the container crash with these error

ERR update check failed error="Get \"https://update.argotunnel.com?arch=amd64&clientVersion=2022.12.1&os=linux\": dial tcp: lookup update.argotunnel.com on mynasip:53: read udp 172.17.0.3:54484->mynasip:53: i/o timeout"
2023-01-12T17:15:01Z ERR Error looking up Cloudflare edge IPs: the DNS query failed error="lookup _v2-origintunneld._tcp.argotunnel.com on mynasip:53: read udp 172.17.0.3:48163->192.168.1.158:53: i/o timeout"

outbound traffic on port 53 is not blocked

any idea why this is happenning?

2

It seems like the container can’t reach the local IP of the DNS resolver, which seems to be 192.168.1.158.

3

yes you are right :frowning:
it will be almost impossible, there is an ISP router that I can’t access to (they don’t provide us access to the main router here in the UAE) so i will not be able to do any port forwarding to the NAS

4

That local IP should be inside your network, though.

There might be ways to make Docker use a public DNS service or change the setting, can’t help you there, though.

5

yes this is my NAS local IP.

6

What network are you using? It should use “bridge” not “host”.

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7

Bridge too.
The issue is with the port forwarding
my home internet is set like that

ISP fiber modem and router (Huwaei) → Unifi Dream Router → AP → Devices

The issue is that the provider is not allowing me to access the config of the Huawei router and i can’t forward port (53 in this case).

8

after reading the documentation, port forwarding is not required. I just the DNS but it still failing with the same error.

Could not lookup srv records on _v2-origintunneld._tcp.argotunnel.com: lookup _v2-origintunneld._tcp.argotunnel.com on 8.8.8.8:53: read udp 172.17.0.3:43314->8.8.8.8:53: i/o timeout