Daniel Swarbrick

> I'd like to have an option to enable metrics such as `go_memstats_alloc_bytes`, etc. Analogously to [prometheus/node_exporter#1148](https://github.com/prometheus/node_exporter/pull/1148). Enable, or _disable_? The metrics are present by default in blackbox_exporter: ``` #...

Is the blackbox_exporter host able to resolve those hostnames, e.g. using the `host` or `dig` tools? PS: If you use enclose pasted content in triple backticks, it's a lot easier...

Can you post the output of a probe with `&debug=true` appended to the scrape URL?

Running blackbox_exporter as root shouldn't require explicitly granting it `cap_net_raw`, since user id 0 is permitted to use raw sockets anyway. To keep the permissions more granular however, running non-root...

@samip5 It would be helpful if you could include the output of a probe with `&debug=true`.

@samip5 The IO timeout error suggests that the echo replies are not being received by blackbox_exporter, e.g. your router is dropping the outbound echo-request, or dropping / filtering the echo-reply....

@t0mcat1337 That would seem to suggest that your SMTP server is simply not responding with the SMTP banner upon connect - at least, not within the configured timeout. How long...

@t0mcat1337 Like @tr3mor, I'm not able to reproduce your issue. I can get blackbox_exporter to successfully probe a Postfix server (after tweaking the regex slightly). Looking at the tcp prober...

blackbox_exporter 0.19.0 is several versions old. Is this still reproducible with v0.23.0?

I'm not able to reproduce this by probing e.g. https://google.com/. Are you only getting unexpected 404 responses from specific targets, or _all_ targets? If only specific targets, then it would...