AIX ssh timeout


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AIX ssh timeout

I have to make a command to work when connecting to AIX 7.1 (used by an internal software).
I have a linux server L where the following command is runned
Code:
ssh -t <aix-server-ip> ls

For a <non-aix-server-ip> the command runs successfully.
For AIX the terminal just gets blocked.

ssh connection to the AIX works very fast:
Code:
ssh -t <aix-server-ip>

It also works for commands which do not require to display anything, like
Code:
ssh -t <aix-server-ip> touch a.txt

I tested from another linux server (apart from linux server L) and I get the same behaviour.

The verbose mode for the commad which doesn't get blocked:
Code:
$ ssh -vvvtl root 192.168.158.149 touch my_file
OpenSSH_7.6p1 Ubuntu-4ubuntu0.3, OpenSSL 1.0.2n  7 Dec 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolving "192.168.158.149" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to 192.168.158.149 [192.168.158.149] port 22.
debug1: Connection established.
debug1: identity file /home/ufo/.ssh/id_rsa type 0
debug1: key_load_public: No such file or directory
debug1: identity file /home/ufo/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ufo/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ufo/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ufo/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ufo/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ufo/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ufo/.ssh/id_ed25519-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.3
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.4
debug1: match: OpenSSH_5.4 pat OpenSSH_5* compat 0x0c000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 192.168.158.149:22 as 'root'
debug3: hostkeys_foreach: reading file "/home/ufo/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /home/ufo/.ssh/known_hosts:21
debug3: load_hostkeys: loaded 1 keys from 192.168.158.149
debug3: order_hostkeyalgs: prefer hostkeyalgs: ssh-rsa-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa
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,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c
debug2: host key algorithms: ssh-rsa-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,zlib@openssh.com,zlib
debug2: compression stoc: none,zlib@openssh.com,zlib
debug2: languages ctos: 
debug2: languages stoc: 
debug2: first_kex_follows 0 
debug2: reserved 0 
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: host key algorithms: ssh-rsa,ssh-dss
debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: MACs ctos: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: MACs stoc: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: compression ctos: none,zlib@openssh.com
debug2: compression stoc: none,zlib@openssh.com
debug2: languages ctos: 
debug2: languages stoc: 
debug2: first_kex_follows 0 
debug2: reserved 0 
debug1: kex: algorithm: diffie-hellman-group-exchange-sha256
debug1: kex: host key algorithm: ssh-rsa
debug1: kex: server->client cipher: aes128-ctr MAC: umac-64@openssh.com compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: umac-64@openssh.com compression: none
debug3: send packet: type 34
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(2048<3072<8192) sent
debug3: receive packet: type 31
debug1: got SSH2_MSG_KEX_DH_GEX_GROUP
debug2: bits set: 1468/3072
debug3: send packet: type 32
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug3: receive packet: type 33
debug1: got SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: ssh-rsa SHA256:rKqVv0YxG0hqHWRu6SGGALraMKVfA3bEsHbe70umL+g
debug3: hostkeys_foreach: reading file "/home/ufo/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /home/ufo/.ssh/known_hosts:21
debug3: load_hostkeys: loaded 1 keys from 192.168.158.149
debug1: Host '192.168.158.149' is known and matches the RSA host key.
debug1: Found key in /home/ufo/.ssh/known_hosts:21
debug2: bits set: 1562/3072
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey after 4294967296 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 after 4294967296 blocks
debug2: key: /home/ufo/.ssh/id_rsa (0x559f8c544340), agent
debug2: key: /home/ufo/.ssh/id_dsa ((nil))
debug2: key: /home/ufo/.ssh/id_ecdsa ((nil))
debug2: key: /home/ufo/.ssh/id_ed25519 ((nil))
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,keyboard-interactive
debug3: start over, passed a different list publickey,password,keyboard-interactive
debug3: preferred gssapi-keyex,gssapi-with-mic,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: RSA SHA256:9gcb7IBZgIseO2IuoMPqspjRhp7vec75bajrBp8oS68 /home/ufo/.ssh/id_rsa
debug3: send_pubkey_test
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 60
debug1: Server accepts key: pkalg ssh-rsa blen 279
debug2: input_userauth_pk_ok: fp SHA256:9gcb7IBZgIseO2IuoMPqspjRhp7vec75bajrBp8oS68
debug3: sign_and_send_pubkey: RSA SHA256:9gcb7IBZgIseO2IuoMPqspjRhp7vec75bajrBp8oS68
debug3: send packet: type 50
debug3: receive packet: type 52
debug1: Authentication succeeded (publickey).
Authenticated to 192.168.158.149 ([192.168.158.149]: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 no-more-sessions@openssh.com
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug3: receive packet: type 91
debug2: channel_input_open_confirmation: channel 0: callback start
debug2: fd 3 setting TCP_NODELAY
debug3: ssh_packet_set_tos: set IP_TOS 0x10
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug3: send packet: type 98
debug1: Sending environment.
debug3: Ignored env CLUTTER_IM_MODULE
debug3: Ignored env LS_COLORS
debug3: Ignored env LESSCLOSE
debug3: Ignored env TERMINATOR_UUID
debug3: Ignored env XDG_MENU_PREFIX
debug1: Sending env LANG = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: send packet: type 98
debug3: Ignored env DISPLAY
debug3: Ignored env GNOME_SHELL_SESSION_MODE
debug3: Ignored env EDITOR
debug3: Ignored env COLORTERM
debug3: Ignored env USERNAME
debug3: Ignored env XDG_VTNR
debug3: Ignored env GIO_LAUNCHED_DESKTOP_FILE_PID
debug3: Ignored env SSH_AUTH_SOCK
debug3: Ignored env MANDATORY_PATH
debug3: Ignored env XDG_SESSION_ID
debug3: Ignored env USER
debug3: Ignored env DESKTOP_SESSION
debug3: Ignored env QT4_IM_MODULE
debug3: Ignored env TEXTDOMAINDIR
debug3: Ignored env DEFAULTS_PATH
debug3: Ignored env PWD
debug3: Ignored env HOME
debug3: Ignored env TEXTDOMAIN
debug3: Ignored env SSH_AGENT_PID
debug3: Ignored env QT_ACCESSIBILITY
debug3: Ignored env XDG_SESSION_TYPE
debug3: Ignored env XDG_DATA_DIRS
debug3: Ignored env http_proxy
debug3: Ignored env TERMINATOR_DBUS_NAME
debug3: Ignored env XDG_SESSION_DESKTOP
debug3: Ignored env GJS_DEBUG_OUTPUT
debug3: Ignored env GTK_MODULES
debug3: Ignored env TERMINATOR_DBUS_PATH
debug3: Ignored env WINDOWPATH
debug3: Ignored env VTE_VERSION
debug3: Ignored env TERM
debug3: Ignored env SHELL
debug3: Ignored env QT_IM_MODULE
debug3: Ignored env XMODIFIERS
debug3: Ignored env IM_CONFIG_PHASE
debug3: Ignored env XDG_CURRENT_DESKTOP
debug3: Ignored env GPG_AGENT_INFO
debug3: Ignored env GIO_LAUNCHED_DESKTOP_FILE
debug3: Ignored env XDG_SEAT
debug3: Ignored env SHLVL
debug3: Ignored env GDMSESSION
debug3: Ignored env GNOME_DESKTOP_SESSION_ID
debug3: Ignored env LOGNAME
debug3: Ignored env DBUS_SESSION_BUS_ADDRESS
debug3: Ignored env XDG_RUNTIME_DIR
debug3: Ignored env XAUTHORITY
debug3: Ignored env XDG_CONFIG_DIRS
debug3: Ignored env PATH
debug3: Ignored env GJS_DEBUG_TOPICS
debug3: Ignored env ftp_proxy
debug3: Ignored env SESSION_MANAGER
debug3: Ignored env LESSOPEN
debug3: Ignored env GTK_IM_MODULE
debug3: Ignored env _
debug1: Sending command: touch my_file
debug2: channel 0: request exec 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: exec request accepted on channel 0
debug3: receive packet: type 98
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug3: receive packet: type 98
debug1: client_input_channel_req: channel 0 rtype eow@openssh.com reply 0
debug2: channel 0: rcvd eow
debug2: channel 0: close_read
debug2: channel 0: input open -> closed
debug3: receive packet: type 96
debug2: channel 0: rcvd eof
debug2: channel 0: output open -> drain
debug2: channel 0: obuf empty
debug2: channel 0: close_write
debug2: channel 0: output drain -> closed
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 fd -1/-1 cc -1)

debug3: send packet: type 1
Connection to 192.168.158.149 closed.
Transferred: sent 3448, received 2808 bytes, in 0.4 seconds
Bytes per second: sent 8877.0, received 7229.3
debug1: Exit status 0
$

The command which gets blocked:
Code:
$ ssh -vvvtl root 192.168.158.149 ls
OpenSSH_7.6p1 Ubuntu-4ubuntu0.3, OpenSSL 1.0.2n  7 Dec 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolving "192.168.158.149" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to 192.168.158.149 [192.168.158.149] port 22.
debug1: Connection established.
debug1: identity file /home/ufo/.ssh/id_rsa type 0
debug1: key_load_public: No such file or directory
debug1: identity file /home/ufo/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ufo/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ufo/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ufo/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ufo/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ufo/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ufo/.ssh/id_ed25519-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.3
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.4
debug1: match: OpenSSH_5.4 pat OpenSSH_5* compat 0x0c000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 192.168.158.149:22 as 'root'
debug3: hostkeys_foreach: reading file "/home/ufo/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /home/ufo/.ssh/known_hosts:21
debug3: load_hostkeys: loaded 1 keys from 192.168.158.149
debug3: order_hostkeyalgs: prefer hostkeyalgs: ssh-rsa-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa
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,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c
debug2: host key algorithms: ssh-rsa-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,zlib@openssh.com,zlib
debug2: compression stoc: none,zlib@openssh.com,zlib
debug2: languages ctos: 
debug2: languages stoc: 
debug2: first_kex_follows 0 
debug2: reserved 0 
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: host key algorithms: ssh-rsa,ssh-dss
debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: MACs ctos: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: MACs stoc: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: compression ctos: none,zlib@openssh.com
debug2: compression stoc: none,zlib@openssh.com
debug2: languages ctos: 
debug2: languages stoc: 
debug2: first_kex_follows 0 
debug2: reserved 0 
debug1: kex: algorithm: diffie-hellman-group-exchange-sha256
debug1: kex: host key algorithm: ssh-rsa
debug1: kex: server->client cipher: aes128-ctr MAC: umac-64@openssh.com compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: umac-64@openssh.com compression: none
debug3: send packet: type 34
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(2048<3072<8192) sent
debug3: receive packet: type 31
debug1: got SSH2_MSG_KEX_DH_GEX_GROUP
debug2: bits set: 1477/3072
debug3: send packet: type 32
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug3: receive packet: type 33
debug1: got SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: ssh-rsa SHA256:rKqVv0YxG0hqHWRu6SGGALraMKVfA3bEsHbe70umL+g
debug3: hostkeys_foreach: reading file "/home/ufo/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /home/ufo/.ssh/known_hosts:21
debug3: load_hostkeys: loaded 1 keys from 192.168.158.149
debug1: Host '192.168.158.149' is known and matches the RSA host key.
debug1: Found key in /home/ufo/.ssh/known_hosts:21
debug2: bits set: 1573/3072
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey after 4294967296 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 after 4294967296 blocks
debug2: key: /home/ufo/.ssh/id_rsa (0x55d8a858c320), agent
debug2: key: /home/ufo/.ssh/id_dsa ((nil))
debug2: key: /home/ufo/.ssh/id_ecdsa ((nil))
debug2: key: /home/ufo/.ssh/id_ed25519 ((nil))
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,keyboard-interactive
debug3: start over, passed a different list publickey,password,keyboard-interactive
debug3: preferred gssapi-keyex,gssapi-with-mic,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: RSA SHA256:9gcb7IBZgIseO2IuoMPqspjRhp7vec75bajrBp8oS68 /home/ufo/.ssh/id_rsa
debug3: send_pubkey_test
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 60
debug1: Server accepts key: pkalg ssh-rsa blen 279
debug2: input_userauth_pk_ok: fp SHA256:9gcb7IBZgIseO2IuoMPqspjRhp7vec75bajrBp8oS68
debug3: sign_and_send_pubkey: RSA SHA256:9gcb7IBZgIseO2IuoMPqspjRhp7vec75bajrBp8oS68
debug3: send packet: type 50
debug3: receive packet: type 52
debug1: Authentication succeeded (publickey).
Authenticated to 192.168.158.149 ([192.168.158.149]: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 no-more-sessions@openssh.com
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug3: receive packet: type 91
debug2: channel_input_open_confirmation: channel 0: callback start
debug2: fd 3 setting TCP_NODELAY
debug3: ssh_packet_set_tos: set IP_TOS 0x10
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug3: send packet: type 98
debug1: Sending environment.
debug3: Ignored env CLUTTER_IM_MODULE
debug3: Ignored env LS_COLORS
debug3: Ignored env LESSCLOSE
debug3: Ignored env TERMINATOR_UUID
debug3: Ignored env XDG_MENU_PREFIX
debug1: Sending env LANG = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: send packet: type 98
debug3: Ignored env DISPLAY
debug3: Ignored env GNOME_SHELL_SESSION_MODE
debug3: Ignored env EDITOR
debug3: Ignored env COLORTERM
debug3: Ignored env USERNAME
debug3: Ignored env XDG_VTNR
debug3: Ignored env GIO_LAUNCHED_DESKTOP_FILE_PID
debug3: Ignored env SSH_AUTH_SOCK
debug3: Ignored env MANDATORY_PATH
debug3: Ignored env XDG_SESSION_ID
debug3: Ignored env USER
debug3: Ignored env DESKTOP_SESSION
debug3: Ignored env QT4_IM_MODULE
debug3: Ignored env TEXTDOMAINDIR
debug3: Ignored env DEFAULTS_PATH
debug3: Ignored env PWD
debug3: Ignored env HOME
debug3: Ignored env TEXTDOMAIN
debug3: Ignored env SSH_AGENT_PID
debug3: Ignored env QT_ACCESSIBILITY
debug3: Ignored env XDG_SESSION_TYPE
debug3: Ignored env XDG_DATA_DIRS
debug3: Ignored env http_proxy
debug3: Ignored env TERMINATOR_DBUS_NAME
debug3: Ignored env XDG_SESSION_DESKTOP
debug3: Ignored env GJS_DEBUG_OUTPUT
debug3: Ignored env GTK_MODULES
debug3: Ignored env TERMINATOR_DBUS_PATH
debug3: Ignored env WINDOWPATH
debug3: Ignored env VTE_VERSION
debug3: Ignored env TERM
debug3: Ignored env SHELL
debug3: Ignored env QT_IM_MODULE
debug3: Ignored env XMODIFIERS
debug3: Ignored env IM_CONFIG_PHASE
debug3: Ignored env XDG_CURRENT_DESKTOP
debug3: Ignored env GPG_AGENT_INFO
debug3: Ignored env GIO_LAUNCHED_DESKTOP_FILE
debug3: Ignored env XDG_SEAT
debug3: Ignored env SHLVL
debug3: Ignored env GDMSESSION
debug3: Ignored env GNOME_DESKTOP_SESSION_ID
debug3: Ignored env LOGNAME
debug3: Ignored env DBUS_SESSION_BUS_ADDRESS
debug3: Ignored env XDG_RUNTIME_DIR
debug3: Ignored env XAUTHORITY
debug3: Ignored env XDG_CONFIG_DIRS
debug3: Ignored env PATH
debug3: Ignored env GJS_DEBUG_TOPICS
debug3: Ignored env ftp_proxy
debug3: Ignored env SESSION_MANAGER
debug3: Ignored env LESSOPEN
debug3: Ignored env GTK_IM_MODULE
debug3: Ignored env _
debug1: Sending command: ls
debug2: channel 0: request exec 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
<the terminal gets blocked here

Any suggestion?

Last edited by ufo; 09-10-2019 at 08:00 AM..
This User Gave Thanks to ufo For This Post:
# 2  
Try without -t (that wants to open a terminal on the remote)
Code:
ssh server command

# 3  
I'm stuck with that -t option. I should make it work. It works on non-AIX machines.
# 4  
Your non-AIX machines are very likely running a newer version of OpenSSH. From the logs you posted, your AIX is running OpenSSH_5.4. I do not have any AIX box running OpenSSH that old. I tried your test cases with machines running OpenSSH_5.8 (the oldest I have) and was able to execute your commands without very verbose mode.

I sadly do not have base media for AIX 7.1.0.0 so I cannot state with 100% accuracy what version of Open SSH was included, but I'd recommend looking at upgrading to the latest for AIX 7.1. Which as of this post is OpenSSH_7.5.102.1801. You can get the packages at AIX Web Download Pack site.

Hope it helps.
These 2 Users Gave Thanks to RecoveryOne For This Post:
# 5  
AIX 7.1 install media has OpenSSH 5.4. Please install both the openssl and openssh upgrades from the site linked above.
These 2 Users Gave Thanks to topcat For This Post:
# 6  
Thanks topcat.
My 7.1.2.0 looks like it has OpenSSH 6.0.
And you are correct you must do OpenSSH and OpenSSL together.
I mean, read me's exist for a reason Smilie
This User Gave Thanks to RecoveryOne For This Post:
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