What may be the reason for being able to access Google but not GitHub

[chainofhonor]

I am using Wireguard and everything is working fine on OpenWrt on X86
I want to move this setting to the router, so I set it up with the router
Identical configuration,Configure using udp2raw
If you use a router, you can access Google, YouTube, and so on, but GitHub cannot access them. What might be the problem

我用的wireguard,在X86的openwrt上一切正常
我想把这个设置搬到路由器上,就用路由器设置了一下
一模一样的配置,用udp2raw配置
结果用路由器的话就是能访问谷歌,youtube,等等都正常,唯独github不能访问,这可能是什么问题

[chainofhonor]

Has anyone encountered the same problem as me
Very strange question
Google can access it, but GitHub can't
Even in global mode, it doesn't work

有人遇到和我相同的问题了吗
很奇怪的问题
谷歌都能访问,就是github不行
哪怕是全局模式也不行

[mxmkeep]

只是用wireguard+udp2raw？有用nginx做应用层代理么？画下架构，可能是http2.0引起的，GitHub域名多解析又不同

[chainofhonor]

只是用wireguard+udp2raw？有用nginx做应用层代理么？画下架构，可能是http2.0引起的，GitHub域名多解析又不同

只有wireguard+udp2raw
路由器刷了openwrt最新的系统

wg设置了MTU=1280

udp2raw 命令如下:
服务端
/root/udp2tcp/udp2raw_amd64 -s -l 1.2.3.4:4501 -r 127.0.0.1:4501 -k "passwd123" --raw-mode faketcp --cipher-mode xor --auth-mode simple &

客户端
/root/udp2tcp/udp2raw_mips24kc_le -c -l 127.0.0.1:4501 -r 1.2.3.4:4501 -k "passwd123" --raw-mode faketcp --cipher-mode xor --auth-mode simple &

dns用的dnsmasq 域名解析分流已经弄了 谷歌 github等都是用8.8.8.8解析的

然后效果就是上面说的 谷歌等各种国外网站都能访问 唯独github不行

另外我还发现,udp2raw长期占用50% 路由器的CPU是MT7621 双核的

[mxmkeep]

看起来确实有些奇怪，你试试在server端，抓发给GitHub的包，看能不能看出什么了

[iopq]

Github doesn't support IPv6 so if your server doesn't have an external IPv4 address it won't connect to it