Networking issues on certain outside networks...?

Installation Home Assistant OS
1

I’m experiencing some weird behavior with my hass.io installation.

I’m on a raspi3b with a 2.5 A power supply. I’ve installed the duckdns add-on with let’s encrypt integration. It’s plugged directly into my router.

On my local network, everything works great accessing it from the duckdns subdomain. On all other networks, everything works great. On my network at work, however, it’s not working. I would normally just assume that they were blocking connections of this nature and I was SOL, but the only reason I posted was because I’ve seen the behavior transition (over the past 3-4 days) from:

  1. nothing working at all, “error_connection_reset” or hassio “unable to connect” page
  2. everything started working wonderfully
  3. Nothing working again, “error_connection_reset” or hassio “unable to connect” page
  4. some things started working, but the /hassio/dashboard website was not available and threw a “failed to load hassio panel from supervisor” error.
  5. nothing working again, “error_connection_reset” or hassio “unable to connect” page

I beginning to think this might be something I could fix if I knew about networking in general. Does this behavior make sense to anybody?

Those of who work in coporate IT, is there something I could do to make my connection more palatable to you guys to a point where it might not be blocked. I know every network is different, but I’m lost at this point.

2

@HudsonMC16 Possibly you have your port translation incorrect. From your work computer at a command prompt, type:

ping your-hostname-here.duckdns.org

and see if it resolves with an IP address. Depending on your answer, I will have another question or two.

3

@sd.rasmussen65 Yes, it shows the external IP of my router, followed by the four ping replies which read:

Reply from some-ip-on-my-work-network: destination host unreachable

4

This could be an issue with a proxy on your work network. You would have to become friends with someone in IT. :wink:

5

@HudsonMC16 I will have to agree with @flamingm0e. I manage Blue Coat proxies at my job. Since we enabled the SSL Intercept layer, my hass instance is not accessible from my work machine. I need to use my phone on LTE in order to use it. I could fix it, but we are a very large firm, and if I made the change it would not go unnoticed :frowning:

6

@Mike1082 Any reason why a successful connection would be intermittent like this?

7

Yes, the firewall and/or proxy admins may be adjusting rules which could explain spotty connectivity. If policy allows, you may be able to use a VPN to get to your home network. Even better MIGHT be using chrome remote desktop; that’s harder (though not impossible) for admins to block.

8

depending on the proxy product, it can be that it is a redirect issue, so it sporadically works, or it is an issue with caching some of the data, and presenting parts of it to you. There really is no telling without knowing the system.

9

Alright, I’ll try to get a VPN setup sometime. Thanks for the insight folks!