Impossible to connect - Connection reset by peer

[SonoCseos]

Dear all, I am failing to connect to my sftp server with sshfs-win manager. It always results in a "connection reset by peer"

Here is the debug level 3 output (... actually I cannot even find an error message):

C:\Users\XXX>"C:\Program Files\SSHFS-Win\bin\sshfs.exe" user@server:/media/Samsung_2GB M: -p22 -ovolname=MediaCenter -odebug -ologlevel=debug3 -oStrictHostKeyChecking=no -oUserKnownHostsFile=/dev/null -oidmap=user -ouid=-1 -ogid=-1 -oumask=000 -ocreate_umask=000 -omax_readahead=1GB -oallow_other -olarge_read -okernel_cache -ofollow_symlinks -oreconnect -oPreferredAuthentications=publickey -oIdentityFile="C:/Users/XXX/.ssh/id_rsa"
SSHFS version 3.5.2
executing <-x> <-a> <-oClearAllForwardings=yes> <-oPort=22> <-ologlevel=debug3> <-oStrictHostKeyChecking=no> <-oUserKnownHostsFile=/dev/null> <-oPreferredAuthentications=publickey> <-oIdentityFile=C:/Users/XXX/.ssh/id_rsa> <-2> user@server <-s>
debug3: Failed to open file:C:/Users/XXX/.ssh/config error:2
debug3: Failed to open file:C:/ProgramData/ssh/ssh_config error:2
debug1: Authenticator provider $SSH_SK_PROVIDER did not resolve; disabling
debug2: resolving "server" port 22
debug3: ssh_connect_direct: entering
debug1: Connecting to server [xxx.xxx.xxx.xxx] port 22.
debug1: Connection established.
debug3: Failed to open file:C:/Users/XXX/.ssh/id_rsa.pub error:2
debug1: identity file C:/Users/XXX/.ssh/id_rsa type 0
debug3: Failed to open file:C:/Users/XXX/.ssh/id_rsa-cert error:2
debug3: Failed to open file:C:/Users/XXX/.ssh/id_rsa-cert.pub error:2
debug3: failed to open file:C:/Users/XXX/.ssh/id_rsa-cert error:2
debug1: identity file C:/Users/XXX/.ssh/id_rsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_8.6
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.9p1 Ubuntu-3ubuntu0.6
debug1: compat_banner: match: OpenSSH_8.9p1 Ubuntu-3ubuntu0.6 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to server:22 as 'user'
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts error:2
debug1: load_hostkeys: fopen PROGRAMDATA\ssh/ssh_known_hosts: No such file or directory
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts2 error:2
debug1: load_hostkeys: fopen PROGRAMDATA\ssh/ssh_known_hosts2: No such file or directory
debug3: order_hostkeyalgs: no algorithms matched; accept original
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,ext-info-c
debug2: host key algorithms: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected],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: curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,[email protected],diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,[email protected]
debug2: host key algorithms: rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
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]
debug2: compression stoc: none,[email protected]
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server->client cipher: [email protected] MAC: compression: none
debug1: kex: client->server cipher: [email protected] MAC: compression: none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: SSH2_MSG_KEX_ECDH_REPLY received
debug1: Server host key: ssh-ed25519 SHA256:nsZwvzHA56FgKkdw62Z+PXhDmK11O0lE11W5hyuEyb8
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts error:2
debug1: load_hostkeys: fopen PROGRAMDATA\ssh/ssh_known_hosts: No such file or directory
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts2 error:2
debug1: load_hostkeys: fopen PROGRAMDATA\ssh/ssh_known_hosts2: No such file or directory
Warning: Permanently added 'server' (ED25519) to the list of known hosts.
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/XXX/.ssh/id_rsa RSA SHA256:cJVvqkuNtkQPIa/5KyXiyFVrN3o4PISfHefqxpPJkiU explicit
debug2: pubkey_prepare: done
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,[email protected],ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected]>
debug1: kex_input_ext_info: [email protected] (unrecognised)
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
debug3: authmethod_lookup publickey
debug3: remaining preferred:
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering public key: C:/Users/XXX/.ssh/id_rsa RSA SHA256:cJVvqkuNtkQPIa/5KyXiyFVrN3o4PISfHefqxpPJkiU explicit
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 60
debug1: Server accepts key: C:/Users/XXX/.ssh/id_rsa RSA SHA256:cJVvqkuNtkQPIa/5KyXiyFVrN3o4PISfHefqxpPJkiU explicit
debug3: sign_and_send_pubkey: RSA SHA256:cJVvqkuNtkQPIa/5KyXiyFVrN3o4PISfHefqxpPJkiU
debug3: sign_and_send_pubkey: signing using rsa-sha2-512 SHA256:cJVvqkuNtkQPIa/5KyXiyFVrN3o4PISfHefqxpPJkiU
debug3: send packet: type 50
debug3: receive packet: type 52
debug1: Authentication succeeded (publickey).
Authenticated to server ([xxx.xxx.xxx.xxx]:22).
debug2: fd 4 setting O_NONBLOCK
debug2: fd 5 setting O_NONBLOCK
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
debug3: receive packet: type 80
debug1: client_input_global_request: rtype [email protected] want_reply 0
debug3: receive packet: type 4
debug1: Remote: /home/user/.ssh/authorized_keys:1: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug3: receive packet: type 4
debug1: Remote: /home/user/.ssh/authorized_keys:1: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
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
debug1: Sending subsystem: sftp
debug2: channel 0: request subsystem 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
debug2: channel 0: rcvd adjust 2097152
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 0
debug2: subsystem request accepted on channel 0
debug3: read - ERROR from cb :87, io:000002594E9DC580
debug2: channel 0: read<=0 rfd 4 len 528280977407
debug2: channel 0: read failed
debug2: chan_shutdown_read: channel 0: (i0 o0 sock -1 wfd 4 efd 6 [write])
debug2: channel 0: input open -> drain
debug2: channel 0: ibuf empty
debug2: channel 0: send eof
debug3: send packet: type 96
debug2: channel 0: input drain -> closed
debug3: receive packet: type 96
debug2: channel 0: rcvd eof
debug2: channel 0: output open -> drain
debug2: channel 0: obuf empty
debug2: chan_shutdown_write: channel 0: (i3 o1 sock -1 wfd 5 efd 6 [write])
debug2: channel 0: output drain -> closed
debug3: receive packet: type 98
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug3: receive packet: type 97
debug2: channel 0: rcvd close
debug3: channel 0: will not send data after close
debug2: channel 0: almost dead
debug2: channel 0: gc: notify user
debug2: channel 0: gc: user detached
debug2: channel 0: send close
debug3: send packet: type 97
debug2: channel 0: is dead
debug2: channel 0: garbage collecting
debug1: channel 0: free: client-session, nchannels 1
debug3: channel 0: status: The following connections are open:
#0 client-session (t4 r0 i3/0 o3/0 e[write]/0 fd -1/-1/6 sock -1 cc -1)

debug3: send packet: type 1
debug3: fd 0 is not O_NONBLOCK
Transferred: sent 3616, received 3288 bytes, in 0.3 seconds
Bytes per second: sent 14433.5, received 13124.2
debug1: Exit status 0
read: Connection reset by peer

If I try with password identification:
C:\Users\user>"C:\Program Files\SSHFS-Win\bin\sshfs.exe" user@server:/media/Samsung_2GB M: -p22 -ovolname=MediaCenter -odebug -ologlevel=debug1 -oStrictHostKeyChecking=no -oUserKnownHostsFile=/dev/null -oidmap=user -ouid=-1 -ogid=-1 -oumask=000 -ocreate_umask=000 -omax_readahead=1GB -oallow_other -olarge_read -okernel_cache -ofollow_symlinks -oreconnect -oPreferredAuthentications=password -opassword_stdin
SSHFS version 3.5.2
N1&n0rF1gl1@D1Hur1n
executing <-x> <-a> <-oClearAllForwardings=yes> <-oPort=22> <-ologlevel=debug1> <-oStrictHostKeyChecking=no> <-oUserKnownHostsFile=/dev/null> <-oPreferredAuthentications=password> <-oNumberOfPasswordPrompts=1> <-2> user@server <-s>
debug1: Authenticator provider $SSH_SK_PROVIDER did not resolve; disabling
debug1: Connecting to server [xxx.xxx.xxx.xxx] port 22.
debug1: Connection established.
debug1: identity file C:\Users\user/.ssh/id_rsa type 0
debug1: identity file C:\Users\user/.ssh/id_rsa-cert type -1
debug1: identity file C:\Users\user/.ssh/id_dsa type -1
debug1: identity file C:\Users\user/.ssh/id_dsa-cert type -1
debug1: identity file C:\Users\user/.ssh/id_ecdsa type -1
debug1: identity file C:\Users\user/.ssh/id_ecdsa-cert type -1
debug1: identity file C:\Users\user/.ssh/id_ecdsa_sk type -1
debug1: identity file C:\Users\user/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file C:\Users\user/.ssh/id_ed25519 type -1
debug1: identity file C:\Users\user/.ssh/id_ed25519-cert type -1
debug1: identity file C:\Users\user/.ssh/id_ed25519_sk type -1
debug1: identity file C:\Users\user/.ssh/id_ed25519_sk-cert type -1
debug1: identity file C:\Users\user/.ssh/id_xmss type -1
debug1: identity file C:\Users\user/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_8.6
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.9p1 Ubuntu-3ubuntu0.6
debug1: compat_banner: match: OpenSSH_8.9p1 Ubuntu-3ubuntu0.6 pat OpenSSH* compat 0x04000000
debug1: Authenticating to server:22 as 'user'
debug1: load_hostkeys: fopen PROGRAMDATA\ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen PROGRAMDATA\ssh/ssh_known_hosts2: No such file or directory
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server->client cipher: [email protected] MAC: compression: none
debug1: kex: client->server cipher: [email protected] MAC: compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: SSH2_MSG_KEX_ECDH_REPLY received
debug1: Server host key: ssh-ed25519 SHA256:nsZwvzHA56FgKkdw62Z+PXhDmK11O0lE11W5hyuEyb8
debug1: load_hostkeys: fopen PROGRAMDATA\ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen PROGRAMDATA\ssh/ssh_known_hosts2: No such file or directory
Warning: Permanently added 'server' (ED25519) to the list of known hosts.
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 134217728 blocks
debug1: pubkey_prepare: ssh_get_authentication_socket: No such file or directory
debug1: Will attempt key: C:\Users\user/.ssh/id_rsa RSA SHA256:cJVvqkuNtkQPIa/5KyXiyFVrN3o4PISfHefqxpPJkiU
debug1: Will attempt key: C:\Users\user/.ssh/id_dsa
debug1: Will attempt key: C:\Users\user/.ssh/id_ecdsa
debug1: Will attempt key: C:\Users\user/.ssh/id_ecdsa_sk
debug1: Will attempt key: C:\Users\user/.ssh/id_ed25519
debug1: Will attempt key: C:\Users\user/.ssh/id_ed25519_sk
debug1: Will attempt key: C:\Users\user/.ssh/id_xmss
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,[email protected],ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected]>
debug1: kex_input_ext_info: [email protected] (unrecognised)
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: password
user@server's password:
debug1: Authentication succeeded (password).
Authenticated to server ([xxx.xxx.xxx.xxx]:22).
debug1: channel 0: new [client-session]
debug1: Requesting [email protected]
debug1: Entering interactive session.
debug1: pledge: network
debug1: client_input_global_request: rtype [email protected] want_reply 0
debug1: Sending subsystem: sftp
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug1: channel 0: free: client-session, nchannels 1
Transferred: sent 1988, received 2452 bytes, in 0.3 seconds
Bytes per second: sent 7667.2, received 9456.7
debug1: Exit status 0
read: Connection reset by peer

BTW I can connect through filezilla.

Thanks for any help and sorry if I am not following the etiquette, this is my first post on GitHub.

[JOTSR]

I have the same problem and it seems to come from /etc/ssh/sshd_config on the host server.
I uncomment the following line.

# override default of no subsystems
Subsystem       sftp    /usr/lib/openssh/sftp-server

And it works with sshfs-win svc \sshfs.kr\user@server!PORT H:. As I don't use port 22 it don't seems to works as UNC address.

[manu0401]

This issue is a duplicate of #74 where I posted some good news in #74 (comment)