我正在尝试使用将文件从本地（Windows 10，Cygwin）计算机复制到远程（Raspberry Pi）计算机scp，但出现超时错误：
$ scp main.bin [email protected]:
ssh: connect to host 123.12.21.123 port 22: Connection timed out
lost connection
使用-vvv选项：
$ scp -vvv main.bin [email protected]:
Executing: program ssh.exe host 123.12.21.123, user root, command scp -v -t .
OpenSSH_for_Windows_8.1p1, LibreSSL 3.0.2
debug3: Failed to open file:C:/Users/myusername/.ssh/config error:2
debug3: Failed to open file:C:/ProgramData/ssh/ssh_config error:2
debug2: resolve_canonicalize: hostname 123.12.21.123 is address
debug2: ssh_connect_direct
debug1: Connecting to 123.12.21.123 [123.12.21.123] port 22.
debug3: finish_connect - ERROR: async io completed with error: 10060, io:000001F145E05D40
debug1: connect to address 123.12.21.123 port 22: Connection timed out
ssh: connect to host 123.12.21.123 port 22: Connection timed out
lost connection
连接ssh没有问题。
知道哪里出了问题吗？
这是远程端口的问题吗scp？如果是，我该如何找到远程端口？
更新 1：这是ssh带有调试信息的会话。可以看出它成功登录到远程计算机。据我解密此转储，它确实使用了端口 22：
$ ssh [email protected] -vvv
OpenSSH_for_Windows_8.1p1, LibreSSL 3.0.2
debug3: Failed to open file:C:/Users/myusername/.ssh/config error:2
debug3: Failed to open file:C:/ProgramData/ssh/ssh_config error:2
debug2: resolve_canonicalize: hostname 123.12.21.123 is address
debug2: ssh_connect_direct
debug1: Connecting to 123.12.21.123 [123.12.21.123] port 22.
debug1: Connection established.
debug1: identity file C:\\Users\\myusername/.ssh/id_rsa type 0
debug3: Failed to open file:C:/Users/myusername/.ssh/id_rsa-cert error:2
debug3: Failed to open file:C:/Users/myusername/.ssh/id_rsa-cert.pub error:2
debug1: identity file C:\\Users\\myusername/.ssh/id_rsa-cert type -1
debug3: Failed to open file:C:/Users/myusername/.ssh/id_dsa error:2
debug3: Failed to open file:C:/Users/myusername/.ssh/id_dsa.pub error:2
debug1: identity file C:\\Users\\myusername/.ssh/id_dsa type -1
debug3: Failed to open file:C:/Users/myusername/.ssh/id_dsa-cert error:2
debug3: Failed to open file:C:/Users/myusername/.ssh/id_dsa-cert.pub error:2
debug1: identity file C:\\Users\\myusername/.ssh/id_dsa-cert type -1
debug3: Failed to open file:C:/Users/myusername/.ssh/id_ecdsa error:2
debug3: Failed to open file:C:/Users/myusername/.ssh/id_ecdsa.pub error:2
debug1: identity file C:\\Users\\myusername/.ssh/id_ecdsa type -1
debug3: Failed to open file:C:/Users/myusername/.ssh/id_ecdsa-cert error:2
debug3: Failed to open file:C:/Users/myusername/.ssh/id_ecdsa-cert.pub error:2
debug1: identity file C:\\Users\\myusername/.ssh/id_ecdsa-cert type -1
debug3: Failed to open file:C:/Users/myusername/.ssh/id_ed25519 error:2
debug3: Failed to open file:C:/Users/myusername/.ssh/id_ed25519.pub error:2
debug1: identity file C:\\Users\\myusername/.ssh/id_ed25519 type -1
debug3: Failed to open file:C:/Users/myusername/.ssh/id_ed25519-cert error:2
debug3: Failed to open file:C:/Users/myusername/.ssh/id_ed25519-cert.pub error:2
debug1: identity file C:\\Users\\myusername/.ssh/id_ed25519-cert type -1
debug3: Failed to open file:C:/Users/myusername/.ssh/id_xmss error:2
debug3: Failed to open file:C:/Users/myusername/.ssh/id_xmss.pub error:2
debug1: identity file C:\\Users\\myusername/.ssh/id_xmss type -1
debug3: Failed to open file:C:/Users/myusername/.ssh/id_xmss-cert error:2
debug3: Failed to open file:C:/Users/myusername/.ssh/id_xmss-cert.pub error:2
debug1: identity file C:\\Users\\myusername/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_8.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.7p1 Raspbian-5+deb8u3
debug1: match: OpenSSH_6.7p1 Raspbian-5+deb8u3 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 123.12.21.123:22 as 'root'
debug3: hostkeys_foreach: reading file "C:\\Users\\myusername/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file C:\\Users\\myusername/.ssh/known_hosts:7
debug3: load_hostkeys: loaded 1 keys from 123.12.21.123
debug3: Failed to open file:C:/Users/myusername/.ssh/known_hosts2 error:2
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts error:2
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts2 error:2
debug3: order_hostkeyalgs: prefer hostkeyalgs: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
debug3: receive packet: type 20
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c
debug2: host key algorithms: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected],[email protected],[email protected],ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected],zlib
debug2: compression stoc: none,[email protected],zlib
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1
debug2: host key algorithms: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],[email protected]
debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],[email protected]
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected]
debug2: compression stoc: none,[email protected]
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: [email protected]
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:ZUOyK+Ds1NrCabdxf0RBG0i4YnI/Vpkrxkhp69S7SVi
debug3: hostkeys_foreach: reading file "C:\\Users\\myusername/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file C:\\Users\\myusername/.ssh/known_hosts:7
debug3: load_hostkeys: loaded 1 keys from 123.12.21.123
debug3: Failed to open file:C:/Users/myusername/.ssh/known_hosts2 error:2
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts error:2
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts2 error:2
debug1: Host '123.12.21.123' is known and matches the ECDSA host key.
debug1: Found key in C:\\Users\\myusername/.ssh/known_hosts:7
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug1: SSH2_MSG_NEWKEYS received
debug2: set_newkeys: mode 0
debug1: rekey in after 134217728 blocks
debug3: unable to connect to pipe \\\\.\\pipe\\openssh-ssh-agent, error: 2
debug1: pubkey_prepare: ssh_get_authentication_socket: No such file or directory
debug1: Will attempt key: C:\\Users\\myusername/.ssh/id_rsa RSA SHA256:u5AP4/ZjDZxyoh/Q3fyETBC9G+6lrV7+ioiHVUeP8zO
debug1: Will attempt key: C:\\Users\\myusername/.ssh/id_dsa
debug1: Will attempt key: C:\\Users\\myusername/.ssh/id_ecdsa
debug1: Will attempt key: C:\\Users\\myusername/.ssh/id_ed25519
debug1: Will attempt key: C:\\Users\\myusername/.ssh/id_xmss
debug2: pubkey_prepare: done
debug3: send packet: type 5
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
debug3: start over, passed a different list publickey,password
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering public key: C:\\Users\\myusername/.ssh/id_rsa RSA SHA256:u5AP4/ZjDZxyoh/Q3fyETBC9G+6lrV7+ioiHVUeP8zO
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: C:\\Users\\myusername/.ssh/id_dsa
debug3: no such identity: C:\\Users\\myusername/.ssh/id_dsa: No such file or directory
debug1: Trying private key: C:\\Users\\myusername/.ssh/id_ecdsa
debug3: no such identity: C:\\Users\\myusername/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: C:\\Users\\myusername/.ssh/id_ed25519
debug3: no such identity: C:\\Users\\myusername/.ssh/id_ed25519: No such file or directory
debug1: Trying private key: C:\\Users\\myusername/.ssh/id_xmss
debug3: no such identity: C:\\Users\\myusername/.ssh/id_xmss: No such file or directory
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
debug3: failed to open file:C:/dev/tty error:3
debug1: read_passphrase: can't open /dev/tty: No such file or directory
[email protected]'s password:
debug3: send packet: type 50
debug2: we sent a password packet, wait for reply
debug3: receive packet: type 52
debug1: Authentication succeeded (password).
Authenticated to 123.12.21.123 ([123.12.21.123]:22).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug3: send packet: type 90
debug1: Requesting [email protected]
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug1: ENABLE_VIRTUAL_TERMINAL_INPUT is supported. Reading the VTSequence from console
debug3: This windows OS supports conpty
debug1: ENABLE_VIRTUAL_TERMINAL_PROCESSING is supported. Console supports the ansi parsing
debug3: Successfully set console output code page from:65001 to 65001
debug3: Successfully set console input code page from:437 to 65001
debug3: receive packet: type 91
debug2: channel_input_open_confirmation: channel 0: callback start
debug2: fd 3 setting TCP_NODELAY
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug3: send packet: type 98
debug2: channel 0: request shell confirm 1
debug3: send packet: type 98
debug2: channel_input_open_confirmation: channel 0: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 0
debug2: PTY allocation request accepted on channel 0
debug2: channel 0: rcvd adjust 2097152
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 0
debug2: shell request accepted on channel 0
The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Sat Jan 22 03:11:15 2022 from 123.12.21.124
/home/pi$
另外，请注意，使用 WinSCP 复制文件可以正常工作。以下是列表Server/Protocol information：
File transfer protocol = SFTP-3
Cryptographic protocol = SSH-2
SSH implementation = OpenSSH_6.7p1 Raspbian-5+deb8u3
Encryption algorithm = AES-256 SDCTR (AES-NI accelerated)
Compression = No
------------------------------------------------------------
Server host key fingerprints
SHA-256 = ssh-ed25519 255 GnPCPpStHbhz+WmXNXTcuYNrsU/126Oq2iAmbkJ6Ys4=
MD5 = ssh-ed25519 255 5e:98:cf:a3:98:4c:9d:16:16:f2:03:65:d9:d9:53:cd
------------------------------------------------------------
Can change permissions = Yes
Can change owner/group = Yes
Can execute arbitrary command = No
Can create symbolic/hard link = Yes/Yes
Can lookup user groups = No
Can duplicate remote files = No
Can check available space = Yes
Can calculate file checksum = No
Native text (ASCII) mode transfers = No
------------------------------------------------------------
Additional information
The server supports these SFTP extensions:
[email protected]="1"
[email protected]="2"
[email protected]="2"
[email protected]="1"
[email protected]="1"
------------------------------------------------------------
Total bytes on device = 29.0 GB (31,221,002,240 B)
Free bytes on device = 24.2 GB (26,007,535,616 B)
Total bytes for user = Unknown
Free bytes for user = 23.0 GB (24,712,527,872 B)
Bytes per allocation unit = 4.00 KB (4,096 B)