FRP服务的端口都是通的，frpc客户端可以联通，但是配置的应用的frp端口，随机的阶段性断开，无法通信，过一段时间又恢复通信，好像自从VX有了这个服务以来，一直是这样，稳定性很差。下面只是随便找了一段时间的日志。用telnet命令在不同的网络机器上测试，故障出现时，确实是telnet应用端口不通，排除自身客户端网络的问题，确定就是VX frp服务端的问题。
2025-10-09 04:00:51.581 [W] [client/service.go:328] [13ae558f62c7e1e6] connect to server error: dial tcp: lookup frps-hk.vxtrans.com: i/o timeout
2025-10-09 04:01:01.024 [client/service.go:325] [13ae558f62c7e1e6] try to connect to server...
2025-10-09 04:01:11.029 [W] [client/service.go:328] [13ae558f62c7e1e6] connect to server error: dial tcp: lookup frps-hk.vxtrans.com: i/o timeout
2025-10-09 04:01:30.695 [client/service.go:325] [13ae558f62c7e1e6] try to connect to server...
2025-10-09 08:35:36.592 [client/service.go:325] [13ae558f62c7e1e6] try to connect to server...
2025-10-09 08:35:46.859 [W] [client/service.go:328] [13ae558f62c7e1e6] connect to server error: connection write timeout
2025-10-09 08:35:56.796 [client/service.go:325] [13ae558f62c7e1e6] try to connect to server...
2025-10-09 08:36:06.879 [W] [client/service.go:328] [13ae558f62c7e1e6] connect to server error: connection write timeout
2025-10-09 08:36:26.884 [client/service.go:325] [13ae558f62c7e1e6] try to connect to server...
2025-10-09 10:12:50.351 [client/service.go:325] [13ae558f62c7e1e6] try to connect to server...
2025-10-09 10:13:00.494 [W] [client/service.go:328] [13ae558f62c7e1e6] connect to server error: connection write timeout
2025-10-09 10:13:20.513 [client/service.go:325] [13ae558f62c7e1e6] try to connect to server...
2025-10-09 10:13:30.764 [W] [client/service.go:328] [13ae558f62c7e1e6] connect to server error: connection write timeout
2025-10-09 11:21:04.079 [client/service.go:325] [13ae558f62c7e1e6] try to connect to server...
2025-10-09 11:21:14.153 [W] [client/service.go:328] [13ae558f62c7e1e6] connect to server error: connection write timeout
2025-10-09 11:21:34.172 [client/service.go:325] [13ae558f62c7e1e6] try to connect to server...
2025-10-09 11:21:44.243 [W] [client/service.go:328] [13ae558f62c7e1e6] connect to server error: connection write timeout
2025-10-09 11:22:04.244 [client/service.go:325] [13ae558f62c7e1e6] try to connect to server...
2025-10-09 11:22:14.323 [W] [client/service.go:328] [13ae558f62c7e1e6] connect to server error: connection write timeout
