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BUG?: sftp via socks5 with PROXYCOMMAND bails with read_packet(): Packet len too high (1818845806 6c69626e)
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Description

Hi, i'm having PROXYCOMMAND issues.

I'm trying to connect from our rhel7 servers to external sftp servers via our socks5 server.

-the rhel7 sftp cli +ncat works ( sftp -vvv -o ProxyCommand='ncat -vvv --proxy <proxy server:port> --proxy-type socks5 %h %p' -o'User <user>' -P 22 <external site> )
but the libssh connection don't.

Attatching failing communication capture:

traffic.pcap17 KBDownload

Libssh bails with "read_packet(): Packet len too high (1818845006 6c69626e)" after ss_send_kex: SSH_MSG_KEXINIT sent

(6c69626e is "libn" in ascii)

I've tested last stable libssh and the latest master (27/1), forcing KEX algo and C_S S_C chipers etc. to no avail. Still the same packet response from 2 diffrent external sftp servers. I'm on statically linked OpenSSL_1_1_0-stable (latest commit) and have further tested with openssl 1.1.1 & boringssl with the same result

Our socks5 proxy don't do any ssh interception

libssh "indirect" connections via a external socks5 bridge / virtual NIC & statically linked borinssl works from my windows7 workstation though.

I guess this is an issue with the openssl implementation since it works for the workstation / boringssl implementation or Is there any issue with the PROXYCOMMAND implementation ?

Thanks

/Niclas

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Event Timeline

Niclas created this task.Thu, Jan 24, 11:39 AM
Niclas updated the task description. (Show Details)Thu, Jan 24, 11:58 AM
Niclas updated the task description. (Show Details)
Niclas updated the task description. (Show Details)
Niclas updated the task description. (Show Details)Thu, Jan 24, 12:01 PM
Niclas updated the task description. (Show Details)Thu, Jan 24, 12:12 PM
Niclas renamed this task from BUG?: sftp via socks5 with PROXYCOMMAND bails with read_packet(): Packet len too high (1818845006 6c69626e) to BUG?: sftp via socks5 with PROXYCOMMAND bails with read_packet(): Packet len too high (1818845806 6c69626e).Thu, Jan 24, 12:37 PM
Niclas updated the task description. (Show Details)Thu, Jan 24, 12:39 PM
Niclas updated the task description. (Show Details)Thu, Jan 24, 3:49 PM
Niclas updated the task description. (Show Details)Thu, Jan 24, 4:45 PM
Niclas updated the task description. (Show Details)Mon, Jan 28, 2:12 PM
asn added a project: Restricted Project.Thu, Feb 7, 2:52 PM
asn added a subscriber: asn.

Can you enable full logging and provide a log?

Niclas added a comment.Thu, Feb 21, 4:13 PM
This comment was removed by Niclas.
Niclas added a comment.Thu, Feb 21, 4:13 PM
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Niclas added a comment.EditedThu, Feb 21, 4:17 PM

[2019/02/21 16:35:31.184417, 2] ssh_connect: libssh 0.8.90 (c) 2003-2019 Aris Adamantiadis, Andreas Schneider and libssh contributors. Distributed under the LGPL, please refer to COPYING file for information about your rights, using threading threads_pthread
[2019/02/21 16:35:31.184544, 2] ssh_socket_connect_proxycommand: Executing proxycommand 'ncat -vvv -C --proxy <proxy server address>:<proxy server port> --proxy-type socks5 <server address> 22'
[2019/02/21 16:35:31.184773, 2] ssh_socket_connect_proxycommand: ProxyCommand connection pipe: [4,7]
[2019/02/21 16:35:31.184898, 1] socket_callback_connected: Socket connection callback: 1 (0)
[2019/02/21 16:35:31.184996, 3] ssh_socket_unbuffered_write: Enabling POLLOUT for socket
[2019/02/21 16:35:31.185080, 2] ssh_connect: Socket connecting, now waiting for the callbacks to work
[2019/02/21 16:35:31.185159, 3] ssh_connect: Actual timeout : 10000
[2019/02/21 16:35:31.185256, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLOUT ), out buffer 0
[2019/02/21 16:35:31.187685, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.187831, 3] callback_receive_banner: ssh_protocol_version_exchange: Ncat: Version 7.70 ( https://nmap.org/ncat )
[2019/02/21 16:35:31.204436, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.204598, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.204748, 3] callback_receive_banner: ssh_protocol_version_exchange: NCAT DEBUG: Using system default trusted CA certificates and those in /usr/share/ncat/ca-bundle.crt.
[2019/02/21 16:35:31.212543, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.212627, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.212665, 3] callback_receive_banner: ssh_protocol_version_exchange: Ncat: Connected to proxy 10.158.167.118:1080
[2019/02/21 16:35:31.213973, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.214044, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.214061, 3] callback_receive_banner: ssh_protocol_version_exchange: Ncat: No authentication needed.
[2019/02/21 16:35:31.328489, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.328627, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.328646, 3] callback_receive_banner: ssh_protocol_version_exchange: Ncat: connection succeeded.
[2019/02/21 16:35:31.328765, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.328784, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_iod_new2(): nsock_iod_new (IOD #1)
[2019/02/21 16:35:31.328851, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.328867, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_iod_new2(): nsock_iod_new (IOD #2)
[2019/02/21 16:35:31.328923, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.328939, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_read(): Read request from IOD #1 [peer unspecified] (timeout: -1ms) EID 10
[2019/02/21 16:35:31.328994, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.329009, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_readbytes(): Read request for 0 bytes from IOD #2 [peer unspecified] EID 18
[2019/02/21 16:35:31.329083, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.329099, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_trace_handler_callback(): Callback: READ SUCCESS for EID 18 [peer unspecified] (23 bytes): SSH-2.0-libssh_0.8.90..
[2019/02/21 16:35:31.329152, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.329167, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_write(): Write request for 23 bytes to IOD #1 EID 27 [peer unspecified]
[2019/02/21 16:35:31.329238, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.329255, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_trace_handler_callback(): Callback: WRITE SUCCESS for EID 27 [peer unspecified]
[2019/02/21 16:35:31.329309, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.329323, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_readbytes(): Read request for 0 bytes from IOD #2 [peer unspecified] EID 34
[2019/02/21 16:35:31.380097, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.380150, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_trace_handler_callback(): Callback: READ SUCCESS for EID 10 [peer unspecified] (36 bytes): SSH-2.0-1.82_sshlib <server name>..
[2019/02/21 16:35:31.380259, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:35:31.380278, 3] callback_receive_banner: Received banner: SSH-2.0-1.82_sshlib <server name>
[2019/02/21 16:35:31.380287, 1] ssh_client_connection_callback: SSH server banner: SSH-2.0-1.82_sshlib <server name>
[2019/02/21 16:35:31.380296, 1] ssh_analyze_banner: Analyzing banner: SSH-2.0-1.82_sshlib <server name>
[2019/02/21 16:35:31.385699, 1] ssh_known_hosts_read_entries: Failed to open the known_hosts file '/etc/ssh/ssh_known_hosts': No such file or directory
session cookie: 56:ff:ca:c3:2b:30:b7:bb:fb:18:88:cb:6d:0f:8c:eb
[2019/02/21 16:35:31.385750, 4] ssh_list_kex: kex algos: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group18-sha512,diffie-hellman-group16-sha512,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1,ext-info-c
[2019/02/21 16:35:31.385762, 4] ssh_list_kex: server host key algo: ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa,rsa-sha2-512,rsa-sha2-256,ssh-dss
[2019/02/21 16:35:31.385771, 4] ssh_list_kex: encryption client->server: aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,3des-cbc
[2019/02/21 16:35:31.385780, 4] ssh_list_kex: encryption server->client: aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,3des-cbc
[2019/02/21 16:35:31.385789, 4] ssh_list_kex: mac algo client->server: hmac-sha2-256,hmac-sha2-512,hmac-sha1
[2019/02/21 16:35:31.385798, 4] ssh_list_kex: mac algo server->client: hmac-sha2-256,hmac-sha2-512,hmac-sha1
[2019/02/21 16:35:31.385807, 4] ssh_list_kex: compression algo client->server: none
[2019/02/21 16:35:31.385815, 4] ssh_list_kex: compression algo server->client: none
[2019/02/21 16:35:31.385824, 4] ssh_list_kex: languages client->server:
[2019/02/21 16:35:31.385833, 4] ssh_list_kex: languages server->client:
[2019/02/21 16:35:31.385859, 3] ssh_socket_unbuffered_write: Enabling POLLOUT for socket
[2019/02/21 16:35:31.385873, 3] packet_send2: packet: wrote [type=20, len=644, padding_size=9, comp=634, payload=634]
[2019/02/21 16:35:31.385883, 3] ssh_send_kex: SSH_MSG_KEXINIT sent
[2019/02/21 16:35:31.385892, 3] ssh_packet_socket_callback: rcv packet cb (len=0, state=INIT)
[2019/02/21 16:35:31.385901, 3] ssh_packet_socket_callback: Waiting for more data (0 < 8)
[2019/02/21 16:35:31.385913, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN POLLOUT ), out buffer 0
[2019/02/21 16:35:31.385928, 3] ssh_packet_socket_callback: rcv packet cb (len=912, state=INIT)
[2019/02/21 16:35:31.385939, 1] ssh_packet_socket_callback: read_packet(): Packet len too high(1818845806 6c69626e)
[2019/02/21 16:35:31.385948, 3] ssh_packet_socket_callback: Packet: processed 8 bytes
[2019/02/21 16:35:31.385957, 3] ssh_packet_socket_callback: Packet: processed 0 bytes
[2019/02/21 16:35:31.385966, 4] ssh_socket_pollcallback: sending control flow event
[2019/02/21 16:35:31.385976, 4] ssh_packet_socket_controlflow_callback: sending channel_write_wontblock callback
[2019/02/21 16:35:31.385988, 3] ssh_connect: current state : 9
Encountered unhandled exeption: An error occured connecting to <server name> reason: read_packet(): Packet len too high(1818845806 6c69626e)

Niclas added a comment.Thu, Feb 21, 4:43 PM

with another endpoint;

[2019/02/21 16:40:54.875040, 2] ssh_connect: libssh 0.8.90 (c) 2003-2019 Aris Adamantiadis, Andreas Schneider and libssh contributors. Distributed under the LGPL, please refer to COPYING file for information about your rights, using threading threads_pthread
[2019/02/21 16:40:54.875161, 2] ssh_socket_connect_proxycommand: Executing proxycommand 'ncat -vvv -C --proxy <proxy server address>:<proxy port> --proxy-type socks5 <server address> 22'
[2019/02/21 16:40:54.875368, 2] ssh_socket_connect_proxycommand: ProxyCommand connection pipe: [4,7]
[2019/02/21 16:40:54.875487, 1] socket_callback_connected: Socket connection callback: 1 (0)
[2019/02/21 16:40:54.875598, 3] ssh_socket_unbuffered_write: Enabling POLLOUT for socket
[2019/02/21 16:40:54.875699, 2] ssh_connect: Socket connecting, now waiting for the callbacks to work
[2019/02/21 16:40:54.875780, 3] ssh_connect: Actual timeout : 10000
[2019/02/21 16:40:54.875871, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLOUT ), out buffer 0
[2019/02/21 16:40:54.877619, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:40:54.877730, 3] callback_receive_banner: ssh_protocol_version_exchange: Ncat: Version 7.70 ( https://nmap.org/ncat )
[2019/02/21 16:40:54.894451, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:40:54.894593, 3] callback_receive_banner: ssh_protocol_version_exchange: NCAT DEBUG: Using system default trusted CA certificates and those in /usr/share/ncat/ca-bundle.crt.
[2019/02/21 16:40:54.902290, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:40:54.902491, 3] callback_receive_banner: ssh_protocol_version_exchange: Ncat: Connected to proxy <proxy address>:<proxy port>
[2019/02/21 16:40:54.903670, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:40:54.903703, 3] callback_receive_banner: ssh_protocol_version_exchange: Ncat: No authentication needed.
[2019/02/21 16:40:54.920129, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:40:54.920205, 3] callback_receive_banner: ssh_protocol_version_exchange: Ncat: connection succeeded.
[2019/02/21 16:40:54.920251, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_iod_new2(): nsock_iod_new (IOD #1)
[2019/02/21 16:40:54.920290, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_iod_new2(): nsock_iod_new (IOD #2)
[2019/02/21 16:40:54.920496, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:40:54.920527, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_read(): Read request from IOD #1 [peer unspecified] (timeout: -1ms) EID 10
[2019/02/21 16:40:54.920546, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_readbytes(): Read request for 0 bytes from IOD #2 [peer unspecified] EID 18
[2019/02/21 16:40:54.920625, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:40:54.920663, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_trace_handler_callback(): Callback: READ SUCCESS for EID 18 [peer unspecified] (23 bytes): SSH-2.0-libssh_0.8.90..
[2019/02/21 16:40:54.920684, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_write(): Write request for 23 bytes to IOD #1 EID 27 [peer unspecified]
[2019/02/21 16:40:54.920757, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:40:54.920786, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_trace_handler_callback(): Callback: WRITE SUCCESS for EID 27 [peer unspecified]
[2019/02/21 16:40:54.920801, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_readbytes(): Read request for 0 bytes from IOD #2 [peer unspecified] EID 34
[2019/02/21 16:40:54.932541, 4] ssh_socket_pollcallback: Poll callback on socket 7 (POLLIN ), out buffer 0
[2019/02/21 16:40:54.932576, 3] callback_receive_banner: ssh_protocol_version_exchange: libnsock nsock_trace_handler_callback(): Callback: READ SUCCESS for EID 10 [peer unspecified] (33 bytes): SSH-2.0-1.36_sshlib GlobalSCAPE..
[2019/02/21 16:40:54.932593, 3] callback_receive_banner: Received banner: SSH-2.0-1.36_sshlib GlobalSCAPE
[2019/02/21 16:40:54.932607, 1] ssh_client_connection_callback: SSH server banner: SSH-2.0-1.36_sshlib GlobalSCAPE
[2019/02/21 16:40:54.932620, 1] ssh_analyze_banner: Analyzing banner: SSH-2.0-1.36_sshlib GlobalSCAPE
Importing a 8 bits, 1 bytes object ...
Importing a 2056 bits, 257 bytes object ...
e: 11
n: 00:ad:3e:84:dc:a1:3e:51:84:17:da:7a:9f:f9:01:6b:4f:7c:38:b2:17:fc:89:61:3b:cd:d6:55:70:71:19:5c:52:06:5f:02:1a:64:02:09:d6:cd:dc:88:2e:80:3d:c4:4e:83:51:cb:b4:91:89:7c:dd:8c:1a:15:c9:ff:04:54:88:fe:ed:6f:16:5c:6d:83:eb:8b:5a:e4:ca:21:a9:85:2b:7c:54:3b:18:48:00:ec:b8:21:c9:ad:83:f4:2e:8a:d1:29:1e:a9:06:02:56:c9:ea:b2:3f:b6:d6:8d:8c:a2:97:97:5e:e5:5b:11:58:7c:b4:9a:c3:47:41:32:f6:b6:cf:b5:75:40:bb:d6:b1:c0:49:8d:51:60:3f:4d:8a:6c:03:07:f0:e2:d4:3d:bf:91:9c:22:1a:a6:ab:aa:16:11:a4:99:06:f7:f3:50:a9:c1:15:b1:84:fc:5d:25:dd:bd:da:6a:e6:60:28:de:48:ff:f4:96:10:42:bf:61:4b:25:d9:1a:44:db:b3:9f:3d:10:bc:98:af:0a:8e:1e:c6:07:b2:01:86:c5:16:8b:1c:e2:69:b7:99:6b:fa:57:e3:43:e6:30:8d:6f:29:f7:4c:f4:65:36:af:d0:4f:4a:8f:71:92:9f:39:e3:3d:47:05:ab:95:80:e8:28:07:54:83:f7:41
[2019/02/21 16:40:54.932997, 1] ssh_known_hosts_read_entries: Failed to open the known_hosts file '/etc/ssh/ssh_known_hosts': No such file or directory
[2019/02/21 16:40:54.933058, 3] ssh_client_select_hostkeys: Changing host key method to "rsa-sha2-512,rsa-sha2-256,ssh-rsa,ssh-ed25519,ecdsa-sha2-nistp521,ecdsa-sha2-nistp384,ecdsa-sha2-nistp256,ssh-dss"
session cookie: 4d:fe:5a:55:b3:9b:8e:5a:c0:f9:86:87:66:ce:d1:c5
[2019/02/21 16:40:54.933158, 4] ssh_list_kex: kex algos: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group18-sha512,diffie-hellman-group16-sha512,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1,ext-info-c
[2019/02/21 16:40:54.933178, 4] ssh_list_kex: server host key algo: rsa-sha2-512,rsa-sha2-256,ssh-rsa,ssh-ed25519,ecdsa-sha2-nistp521,ecdsa-sha2-nistp384,ecdsa-sha2-nistp256,ssh-dss
[2019/02/21 16:40:54.933194, 4] ssh_list_kex: encryption client->server: aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,3des-cbc
[2019/02/21 16:40:54.933209, 4] ssh_list_kex: encryption server->client: aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,3des-cbc
[2019/02/21 16:40:54.933223, 4] ssh_list_kex: mac algo client->server: hmac-sha2-256,hmac-sha2-512,hmac-sha1
[2019/02/21 16:40:54.933237, 4] ssh_list_kex: mac algo server->client: hmac-sha2-256,hmac-sha2-512,hmac-sha1
[2019/02/21 16:40:54.933253, 4] ssh_list_kex: compression algo client->server: none
[2019/02/21 16:40:54.933267, 4] ssh_list_kex: compression algo server->client: none
[2019/02/21 16:40:54.933280, 4] ssh_list_kex: languages client->server:
[2019/02/21 16:40:54.933294, 4] ssh_list_kex: languages server->client:
[2019/02/21 16:40:54.933325, 3] ssh_socket_unbuffered_write: Enabling POLLOUT for socket
[2019/02/21 16:40:54.933411, 3] packet_send2: packet: wrote [type=20, len=644, padding_size=9, comp=634, payload=634]
[2019/02/21 16:40:54.933430, 3] ssh_send_kex: SSH_MSG_KEXINIT sent
[2019/02/21 16:40:54.933445, 3] ssh_packet_socket_callback: rcv packet cb (len=91, state=INIT)
[2019/02/21 16:40:54.933461, 1] ssh_packet_socket_callback: read_packet(): Packet len too high(1818845806 6c69626e)
[2019/02/21 16:40:54.933476, 3] ssh_packet_socket_callback: Packet: processed 8 bytes
[2019/02/21 16:40:54.933498, 3] ssh_packet_socket_callback: Packet: processed 0 bytes
[2019/02/21 16:40:54.933521, 3] ssh_connect: current state : 9
Encountered unhandled exeption: An error occured connecting to <server address> reason: read_packet(): Packet len too high(1818845806 6c69626e)