我正在尝试通过终端中的telnet命令连接到localhost 3310 端口上的 ClamAV 守护程序clamd：telnet 127.0.0.1 3310
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
nIDSESSION [pressed ENTER button on keyboard]
nPING [pressed ENTER]
但它给出了错误：
1: Only nCMDS\n and zCMDS\0 are accepted inside IDSESSION. ERROR
1: Error processing command. ERROR
Connection closed by foreign host.
输入zPING\0 [pressed ENTER]还是nPING\n没用，再次提示那个错误。你能提出什么建议吗？