登录本地端口时出错

[islercn]

服务器是ubuntu 22.04.5，webssh 1.6.2，python 3.10.12

服务器上还有个frp服务端转发内网服务器的ssh，比如1234号端口指向服务器A，为了安全，我想屏蔽外部对1234端口的访问，然后让webssh通过访问localhost:1234这样的形式访问服务器A，访问是可以访问，但是经常会先提示几次Websocket authentication failed.才能成功连接，次数不固定，极个别情况下一次成功，不用localhost似乎没有这个问题，出错时服务器会提示：

[I 241029 15:36:58 handler:452] Connecting to localhost:1234
[I 241029 15:36:58 transport:1893] Connected (version 2.0, client OpenSSH_8.9p1)
/usr/local/lib/python3.10/dist-packages/paramiko/client.py:889: UserWarning: Unknown ssh-ed25519 host key for [localhost]:1234: b'86322bb70dee802d142188aa94952bf7'
warnings.warn(
[I 241029 15:36:58 handler:86] Trying password authentication
[I 241029 15:36:58 transport:1893] Authentication (password) successful!
[I 241029 15:36:58 web:2344] 200 POST / (ClientIP) 411.10ms
[I 241029 15:36:58 web:2344] 101 GET /ws?id=4nLBpLinQMnXioKS19j6Dzyj7k_0poDkkNV6sgKnj34 (ClientIP2) 0.71ms
[I 241029 15:36:58 handler:537] Connected from ClientIP2:65535
[I 241029 15:36:58 handler:597] Disconnected from ClientIP2:65535
[W 241029 15:37:01 worker:33] Recycling worker 4nLBpLinQMnXioKS19j6Dzyj7k_0poDkkNV6sgKnj34
[I 241029 15:37:01 worker:123] Closing worker 4nLBpLinQMnXioKS19j6Dzyj7k_0poDkkNV6sgKnj34 with reason: worker recycled
[I 241029 15:37:01 worker:131] Connection to localhost:1234 lost

如果成功登录服务器会提示：

[I 241029 15:37:51 handler:452] Connecting to localhost:1234
[I 241029 15:37:51 transport:1893] Connected (version 2.0, client OpenSSH_8.9p1)
[I 241029 15:37:51 handler:86] Trying password authentication
[I 241029 15:37:51 transport:1893] Authentication (password) successful!
[I 241029 15:37:51 web:2344] 200 POST / (ClientIP) 373.33ms
[I 241029 15:37:51 web:2344] 101 GET /ws?id=UGm0XuHcwXRrPhcavS7-dCZQ8BoZ17bcqlC7gJ4vTeE (ClientIP) 0.76ms
[I 241029 15:37:51 handler:537] Connected from ClientIP:65535

同时，如果指定一个错误端口，服务器会报错：

[I 241029 15:35:05 handler:452] Connecting to localhost:55555
[E 241029 15:35:05 handler:516] Traceback (most recent call last):
File "/usr/local/lib/python3.10/dist-packages/webssh/handler.py", line 455, in ssh_connect
ssh.connect(*args, timeout=options.timeout)
File "/usr/local/lib/python3.10/dist-packages/paramiko/client.py", line 409, in connect
raise NoValidConnectionsError(errors)
paramiko.ssh_exception.NoValidConnectionsError: [Errno None] Unable to connect to port 55555 on 127.0.0.1
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/local/lib/python3.10/dist-packages/webssh/handler.py", line 514, in post
worker = yield future
File "/usr/local/lib/python3.10/dist-packages/tornado/gen.py", line 767, in run
value = future.result()
File "/usr/lib/python3.10/concurrent/futures/_base.py", line 451, in result
return self.__get_result()
File "/usr/lib/python3.10/concurrent/futures/_base.py", line 403, in __get_result
raise self._exception
File "/usr/lib/python3.10/concurrent/futures/thread.py", line 58, in run
result = self.fn(*self.args, **self.kwargs)
File "/usr/local/lib/python3.10/dist-packages/webssh/handler.py", line 457, in ssh_connect
raise ValueError('Unable to connect to {}:{}'.format(*dst_addr))
ValueError: Unable to connect to localhost:55555