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Caddy subdomain reverse proxy performance (lemmy.world)
submitted 1 year ago* (last edited 1 year ago) by lemming741@lemmy.world to c/selfhosted@lemmy.world
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I'd asked about using a VPS to get better routing to my homelab in this post: https://lemmy.world/post/1424540

I've narrowed down my problem- if i use a subdomain in my caddyfile, performance is 1/3 or worse compared to just the root.

example.com {reverse_proxy 192.168.1.57}

will saturate my gigabit lan connection at 980ish. On a 5gUW connection i get my advertised 50 mbit or more

librespeed.example.com {reverse_proxy 192.168.1.57}

I get 220-250 megabits on my internal lan. The same 5gUW connection will only get 7 or 8 mbit.

It's strange to me that everything seems to work just fine, but it's just slow. Anyone got any ideas?

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[-] doot@social.bug.expert 1 points 1 year ago

is it possible the subdomain resolves to an ip your router can't see due to nat hairpinning?

[-] lemming741@lemmy.world 4 points 1 year ago

I tried to dig into that but couldn't come up with a good test. But if NAT hairpinning wasn't working right, I'd be limited to my ISPs 50Mbit, right? I could get 200+ Mbit on wifi. I also tested this from work (50 Mbit sym fiber) and subdomains always were slower. I figured out today it's HTTP/3 causing my problems. I don't know if I care to troubleshoot anymore since it's working great with http 1 & 2.

[-] doot@social.bug.expert 2 points 1 year ago

Interesting stuff, perhaps report it to the Caddy devs, h3 isn't really "stable" afaik

[-] lemming741@lemmy.world 4 points 1 year ago

https://github.com/caddyserver/caddy/issues/4876

Looks like they already know, and upstream is working on it. I am curious why the sub domains get http/3 and the root domain does not.

[-] doot@social.bug.expert 2 points 1 year ago

wow, some of those comments mirror your situation exactly hah

this post was submitted on 06 Aug 2023
13 points (88.2% liked)

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