---- Resolving host address...
---- 1 address found: 59.172.118.151
---- Connecting to linghu0060.asuscomm.cn (59.172.118.151) port 21
<--- 220 Welcome to ASUS RT-AC86U FTP service.
---> AUTH TLS
<--- 234 Proceed with negotiation.
---> USER
Certificate: CN=linghu0060.asuscomm.cn
Issued by: C=US,O=Let's Encrypt,CN=R11
Checking against: C=US,O=Let's Encrypt,CN=R11
Trusted
Certificate: C=US,O=Let's Encrypt,CN=R11
Issued by: C=US,O=Internet Security Research Group,CN=ISRG Root X1
Trusted
<--- 530 Anonymous sessions may not use encryption.
---> QUIT
gnutls_record_recv: The TLS connection was non-properly terminated. Assuming EOF.
<--- 221 Goodbye.
---- Closing control socket