SnipeIT behind Caddy

Help
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1. Caddy version: 2.6.2

2. How I installed, and run Caddy:

Fresh install of Ubuntu 22.04 server and followed the guide

a. System environment:

Ubuntu 22.04 VM

d. My complete Caddy config:

snipeit2.grantbulldogs.org {
        reverse_proxy 172.16.8.190 {
                trusted_proxies 172.16.8.0/22
                header_up X-Real-IP {remote}
                header_down Strict-Transport-Security max-age=31536000
        }
}

3. The problem I’m having:

Getting an Err_SSL_Protocol_Error

I know SnipeIT wants to be made aware of the reverse_proxy (they say use X-Forwarded-Proto on their site). I am having trouble figuring out how to do this as this is the first time I’ve run into this.

4. Error messages and/or full log output:

Getting an Err_SSL_Protocol_Error

5. What I already tried:

Been messing around by using the head_up command and the commands currently in my CaddyFile, but no dice. I’m not super familiar with doing this, so I don’t know what else to try.

I’ve also made sure to add the IP for my Caddy server as a trusted proxy on my SnipeIT .env file.

6. Links to relevant resources:

SnipeIT’s page for reverse-proxies

2

What’s in Caddy’s logs, though?

See here in the docs: Keep Caddy Running — Caddy Documentation

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