FreeRadius服务器不响应外部Access-Request请求问题求助

各位大佬好，我最近部署了FreeRadius，本地用radtest测试一切正常，但当外部服务器发送Access-Request请求时，服务器完全没有回复。我用radsniff抓包的结果如下：

[root@pgw-radius tmp]# radsniff -i ens192

2023-03-18 17:29:17.588990 (1) Access-Request Id 91 ens192:10.0.34.13:48791 -> 10.0.33.108:1812 +0.000

2023-03-18 17:29:22.788990 (1) ** norsp ** Access-Request Id 91 ens192:10.0.34.13:48791 -> 10.0.33.108:1812

2023-03-18 17:29:52.771149 (2) Access-Request Id 51 ens192:10.0.34.13:48799 -> 10.0.33.108:1812 +35.182

2023-03-18 17:29:52.865949 (3) Access-Request Id 92 ens192:10.0.34.13:48791 -> 10.0.33.108:1812 +35.276

2023-03-18 17:29:57.971149 (2) ** norsp ** Access-Request Id 51 ens192:10.0.34.13:48799 -> 10.0.33.108:1812

2023-03-18 17:29:58.659490 (3) ** norsp ** Access-Request Id 92 ens192:10.0.34.13:48791 -> 10.0.33.108:1812

同时，我查看了FreeRadius的debug日志，发现关键提示：

Listening on auth address * port 1812 bound to server default
Listening on acct address * port 1813 bound to server default
Listening on auth address :: port 1812 bound to server default
Listening on acct address :: port 1813 bound to server default
Listening on auth address 127.0.0.1 port 18120 bound to server inner-tunnel
Listening on proxy address * port 43265
Listening on proxy address :: port 40852
Ready to process requests

Ignoring request to auth address * port 1812 bound to server default from unknown client 10.0.34.13 port 48791 proto udp
Ready to process requests

Ignoring request to auth address * port 1812 bound to server default from unknown client 10.0.34.13 port 48791 proto udp
Ready to process requests

Ignoring request to auth address * port 1812 bound to server default from unknown client 10.0.34.13 port 48791 proto udp
Ready to process requests

Ignoring request to auth address * port 1812 bound to server default from unknown client 10.0.34.13 port 48799 proto udp
Ready to process requests

从日志里能看到服务器一直在忽略来自10.0.34.13的请求，提示是“unknown client”，但我不太清楚具体该怎么配置才能让服务器识别这个外部客户端并正常响应，有没有大佬能指点一下？

备注：内容来源于stack exchange，提问作者Oye