raw.githubusercontent.com

[stepas 0]

It's important for me to download some code snippets from raw.githubusercontent.com.
I'm able to resolve the IP address correctly using the 1.1.1.1 DNS server, but can't access the actual content. See https://airvpn.org/routes/?q=https%3A%2F%2Fraw.githubusercontent.com

My command line query stalls like this:

wget https://raw.githubusercontent.com/DioxusLabs/dioxus/master/LICENSE-MIT
--2023-08-06 20:32:06--  https://raw.githubusercontent.com/DioxusLabs/dioxus/master/LICENSE-MIT
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 185.199.108.133, 185.199.111.133, 185.199.110.133, ...
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|185.199.108.133|:443... connected.

Edited ... by stepas

[benfitita 39]

Could it be that you are using Wireguard and need to set smaller MTU, like 1280?

Works for me. Routes tool shows 301 (redirection), because 

https://raw.githubusercontent.com

without path to any file, always redirects to https://github.com. Routes tool unfortunately only requests the / instead of full path, so no way to do a proper check. Maybe @Staff could improve it to perform HTTP checks using full supplied path.

 

wget https://raw.githubusercontent.com/DioxusLabs/dioxus/master/LICENSE-MIT
--2023-08-07 10:24:11-- https://raw.githubusercontent.com/DioxusLabs/dioxus/master/LICENSE-MIT
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 185.199.109.133, 185.199.111.133, 185.199.108.133, ...
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|185.199.109.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1023 [text/plain]
Saving to: ‘LICENSE-MIT’

LICENSE-MIT                                     100%[======================================================================================================>]    1023  --.-KB/s    in 0s

2023-08-07 10:24:11 (38.1 MB/s) - ‘LICENSE-MIT’ saved [1023/1023]

[OpenSourcerer 1435]

You should tell from which server you tried to do so, so that others can check as well.

[stepas 0]

Yes, it's possible that it's related to MTU, meaning some config on my end.

Just realized the problem is intermittent, sometimes works, sometimes doesn't. I am not a fan of this, since it may come back at some point.

I am using Wireguard, and it's set up on my OPNsense router with clients connecting to AirVPN through the router. The MTU of the Wireguard config was set to 1320. Other ones were left to be default.

I tried updating MTU values in a few additional places:
- MTU on the LAN interface in OPNsense now set 1320
- MTU on the client computer interface is now set 1320
- MTU on the docker bridge network on the client computer set to 1320
After this everything broke down, and I reverted all of these.

Edited ... by stepas