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siriobalmelli
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Posts: 5
Joined: Wed May 09, 2018 1:15 pm

SSH and mac-telnet hang when logging into ROS 6.48

Tue May 11, 2021 5:04 pm

SSH or MAC-Telnet sessions hang indefinitely (days).

1. Time-stamped verbose negotiation of an SSH session (key data elided):
$ ssh -vvvvv ccr1036.area.fqdn 2>&1 | ts
May 11 11:53:28 OpenSSH_8.5p1, OpenSSL 1.1.1k  25 Mar 2021
May 11 11:53:28 debug1: Reading configuration data /Users/user1/.ssh/config
May 11 11:53:28 debug3: kex names ok: [diffie-hellman-group14-sha1]
May 11 11:53:28 debug1: /Users/user1/.ssh/config line 170: Applying options for ccr*.fqdn
May 11 11:53:28 debug1: /Users/user1/.ssh/config line 176: Applying options for *.fqdn
May 11 11:53:28 debug1: Reading configuration data /etc/ssh/ssh_config
May 11 11:53:28 debug1: /etc/ssh/ssh_config line 47: Applying options for *
May 11 11:53:28 debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts' -> '/Users/user1/.ssh/known_hosts'
May 11 11:53:28 debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts2' -> '/Users/user1/.ssh/known_hosts2'
May 11 11:53:28 debug2: resolving "ccr1036.area.fqdn" port 22
May 11 11:53:28 debug3: ssh_connect_direct: entering
May 11 11:53:28 debug1: Connecting to ccr1036.area.fqdn [192.168.19.226] port 22.
May 11 11:53:28 debug3: set_sock_tos: set socket 5 IP_TOS 0x48
May 11 11:53:28 debug1: Connection established.
May 11 11:53:28 debug1: identity file /Users/user1/.ssh/keys/fqdn_user1 type 0
May 11 11:53:28 debug1: identity file /Users/user1/.ssh/keys/fqdn_user1-cert type -1
May 11 11:53:28 debug1: Local version string SSH-2.0-OpenSSH_8.5
May 11 11:53:28 debug1: Remote protocol version 2.0, remote software version ROSSSH
May 11 11:53:28 debug1: compat_banner: no match: ROSSSH
May 11 11:53:28 debug2: fd 5 setting O_NONBLOCK
May 11 11:53:28 debug1: Authenticating to ccr1036.area.fqdn:22 as 'user1'
May 11 11:53:28 debug3: record_hostkey: found key type RSA in file /Users/user1/.ssh/known_hosts:14
May 11 11:53:28 debug3: load_hostkeys_file: loaded 1 keys from ccr1036.area.fqdn
May 11 11:53:28 debug1: load_hostkeys: fopen /Users/user1/.ssh/known_hosts2: No such file or directory
May 11 11:53:28 debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
May 11 11:53:28 debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
May 11 11:53:28 debug3: order_hostkeyalgs: prefer hostkeyalgs: rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa
May 11 11:53:28 debug3: send packet: type 20
May 11 11:53:28 debug1: SSH2_MSG_KEXINIT sent
May 11 11:53:28 debug3: receive packet: type 20
May 11 11:53:28 debug1: SSH2_MSG_KEXINIT received
May 11 11:53:28 debug2: local client KEXINIT proposal
May 11 11:53:28 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-group14-sha256,ext-info-c
May 11 11:53:28 debug2: host key algorithms: rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa,ssh-ed25519-cert-v01@openssh.com,ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,sk-ssh-ed25519-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ssh-ed25519@openssh.com,sk-ecdsa-sha2-nistp256@openssh.com
May 11 11:53:28 debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
May 11 11:53:28 debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
May 11 11:53:28 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
May 11 11:53:28 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
May 11 11:53:28 debug2: compression ctos: none,zlib@openssh.com,zlib
May 11 11:53:28 debug2: compression stoc: none,zlib@openssh.com,zlib
May 11 11:53:28 debug2: languages ctos: 
May 11 11:53:28 debug2: languages stoc: 
May 11 11:53:28 debug2: first_kex_follows 0 
May 11 11:53:28 debug2: reserved 0 
May 11 11:53:28 debug2: peer server KEXINIT proposal
May 11 11:53:28 debug2: KEX algorithms: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
May 11 11:53:28 debug2: host key algorithms: ssh-dss,rsa-sha2-256,ssh-rsa
May 11 11:53:28 debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,3des-cbc,none
May 11 11:53:28 debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,3des-cbc,none
May 11 11:53:28 debug2: MACs ctos: hmac-sha1,hmac-md5
May 11 11:53:28 debug2: MACs stoc: hmac-sha1,hmac-md5
May 11 11:53:28 debug2: compression ctos: none
May 11 11:53:28 debug2: compression stoc: none
May 11 11:53:28 debug2: languages ctos: 
May 11 11:53:28 debug2: languages stoc: 
May 11 11:53:28 debug2: first_kex_follows 0 
May 11 11:53:28 debug2: reserved 0 
May 11 11:53:28 debug1: kex: algorithm: diffie-hellman-group-exchange-sha256
May 11 11:53:28 debug1: kex: host key algorithm: rsa-sha2-256
May 11 11:53:28 debug1: kex: server->client cipher: aes128-ctr MAC: hmac-sha1 compression: none
May 11 11:53:28 debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha1 compression: none
May 11 11:53:28 debug3: send packet: type 34
May 11 11:53:28 debug1: SSH2_MSG_KEX_DH_GEX_REQUEST sent
May 11 11:53:28 debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
May 11 11:53:28 debug3: receive packet: type 31
May 11 11:53:28 debug1: SSH2_MSG_KEX_DH_GEX_GROUP received
May 11 11:53:28 debug2: bits set: 993/2048
May 11 11:53:28 debug3: send packet: type 32
May 11 11:53:28 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
May 11 11:53:28 debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
May 11 11:53:29 debug3: receive packet: type 33
May 11 11:53:29 debug1: SSH2_MSG_KEX_DH_GEX_REPLY received
May 11 11:53:29 debug1: Server host key: ssh-rsa SHA256:KEY
May 11 11:53:29 debug3: record_hostkey: found key type RSA in file /Users/user1/.ssh/known_hosts:14
May 11 11:53:29 debug3: load_hostkeys_file: loaded 1 keys from ccr1036.area.fqdn
May 11 11:53:29 debug1: load_hostkeys: fopen /Users/user1/.ssh/known_hosts2: No such file or directory
May 11 11:53:29 debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
May 11 11:53:29 debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
May 11 11:53:29 debug1: Host 'ccr1036.area.fqdn' is known and matches the RSA host key.
May 11 11:53:29 debug1: Found key in /Users/user1/.ssh/known_hosts:14
May 11 11:53:29 debug2: bits set: 1020/2048
May 11 11:53:29 debug3: send packet: type 21
May 11 11:53:29 debug2: set_newkeys: mode 1
May 11 11:53:29 debug1: rekey out after 4294967296 blocks
May 11 11:53:29 debug1: SSH2_MSG_NEWKEYS sent
May 11 11:53:29 debug1: expecting SSH2_MSG_NEWKEYS
May 11 11:53:29 debug3: receive packet: type 21
May 11 11:53:29 debug1: SSH2_MSG_NEWKEYS received
May 11 11:53:29 debug2: set_newkeys: mode 0
May 11 11:53:29 debug1: rekey in after 4294967296 blocks
May 11 11:53:29 debug1: Will attempt key: (none) ED25519 SHA256:KEY agent
May 11 11:53:29 debug1: Will attempt key: /Users/user1/.ssh/keys/fqdn_user1 RSA SHA256:KEY explicit
May 11 11:53:29 debug2: pubkey_prepare: done
May 11 11:53:29 debug3: send packet: type 5
May 11 11:53:29 debug3: receive packet: type 6
May 11 11:53:29 debug2: service_accept: ssh-userauth
May 11 11:53:29 debug1: SSH2_MSG_SERVICE_ACCEPT received
May 11 11:53:29 debug3: send packet: type 50
May 11 11:53:29 debug3: receive packet: type 51
May 11 11:53:29 debug1: Authentications that can continue: publickey,password
May 11 11:53:29 debug3: start over, passed a different list publickey,password
May 11 11:53:29 debug3: preferred publickey,keyboard-interactive,password
May 11 11:53:29 debug3: authmethod_lookup publickey
May 11 11:53:29 debug3: remaining preferred: keyboard-interactive,password
May 11 11:53:29 debug3: authmethod_is_enabled publickey
May 11 11:53:29 debug1: Next authentication method: publickey
May 11 11:53:29 debug1: Offering public key: (none) ED25519 SHA256:KEY agent
May 11 11:53:29 debug3: send packet: type 50
May 11 11:53:29 debug2: we sent a publickey packet, wait for reply
May 11 11:53:29 debug3: receive packet: type 51
May 11 11:53:29 debug1: Authentications that can continue: publickey,password
May 11 11:53:29 debug1: Offering public key: /Users/user1/.ssh/keys/fqdn_user1 RSA SHA256:KEY explicit
May 11 11:53:29 debug3: send packet: type 50
May 11 11:53:29 debug2: we sent a publickey packet, wait for reply
May 11 11:53:29 debug3: receive packet: type 60
May 11 11:53:29 debug1: Server accepts key: /Users/user1/.ssh/keys/fqdn_user1 RSA SHA256:KEY explicit
May 11 11:53:29 debug3: sign_and_send_pubkey: RSA SHA256:KEY
May 11 11:53:29 debug3: sign_and_send_pubkey: signing using ssh-rsa SHA256:KEY
May 11 11:53:29 debug3: send packet: type 50
May 11 11:53:29 debug3: receive packet: type 52
May 11 11:53:29 debug1: Authentication succeeded (publickey).
May 11 11:53:29 Authenticated to ccr1036.area.fqdn ([192.168.19.226]:22).
May 11 11:53:29 debug2: fd 7 setting O_NONBLOCK
May 11 11:53:29 debug3: fd 8 is O_NONBLOCK
May 11 11:53:29 debug1: channel 0: new [client-session]
May 11 11:53:29 debug3: ssh_session2_open: channel_new: 0
May 11 11:53:29 debug2: channel 0: send open
May 11 11:53:29 debug3: send packet: type 90
May 11 11:53:29 debug1: Entering interactive session.
May 11 11:53:29 debug1: pledge: filesystem full
May 11 11:53:29 debug3: receive packet: type 91
May 11 11:53:29 debug2: channel_input_open_confirmation: channel 0: callback start
May 11 11:53:29 debug2: fd 5 setting TCP_NODELAY
May 11 11:53:29 debug3: set_sock_tos: set socket 5 IP_TOS 0x48
May 11 11:53:29 debug2: client_session2_setup: id 0
May 11 11:53:29 debug2: channel 0: request pty-req confirm 1
May 11 11:53:29 debug3: send packet: type 98
May 11 11:53:29 debug1: Sending environment.
May 11 11:53:29 debug3: Ignored env NIX_PROFILES
May 11 11:53:29 debug3: Ignored env TERM_PROGRAM
May 11 11:53:29 debug3: Ignored env TERM
May 11 11:53:29 debug3: Ignored env SHELL
May 11 11:53:29 debug3: Ignored env HISTSIZE
May 11 11:53:29 debug3: Ignored env TMPDIR
May 11 11:53:29 debug3: Ignored env LIBRARY_PATH
May 11 11:53:29 debug3: Ignored env TERM_PROGRAM_VERSION
May 11 11:53:29 debug3: Ignored env OLDPWD
May 11 11:53:29 debug3: Ignored env TERM_SESSION_ID
May 11 11:53:29 debug1: channel 0: setting env LC_ALL = "en_US.UTF-8"
May 11 11:53:29 debug2: channel 0: request env confirm 0
May 11 11:53:29 debug3: send packet: type 98
May 11 11:53:29 debug3: Ignored env HISTFILESIZE
May 11 11:53:29 debug3: Ignored env USER
May 11 11:53:29 debug3: Ignored env LS_COLORS
May 11 11:53:29 debug3: Ignored env CPATH
May 11 11:53:29 debug3: Ignored env SSH_AUTH_SOCK
May 11 11:53:29 debug3: Ignored env PAGER
May 11 11:53:29 debug3: Ignored env PATH
May 11 11:53:29 debug3: Ignored env LaunchInstanceID
May 11 11:53:29 debug3: Ignored env NIX_PATH
May 11 11:53:29 debug3: Ignored env PWD
May 11 11:53:29 debug3: Ignored env EDITOR
May 11 11:53:29 debug3: Ignored env XPC_FLAGS
May 11 11:53:29 debug3: Ignored env NIX_SSL_CERT_FILE
May 11 11:53:29 debug3: Ignored env XPC_SERVICE_NAME
May 11 11:53:29 debug3: Ignored env GPG_TTY
May 11 11:53:29 debug3: Ignored env MANPAGER
May 11 11:53:29 debug3: Ignored env HOME
May 11 11:53:29 debug3: Ignored env SHLVL
May 11 11:53:29 debug3: Ignored env XDG_CONFIG_HOME
May 11 11:53:29 debug3: Ignored env BASH_ENV
May 11 11:53:29 debug3: Ignored env PYTHONPATH
May 11 11:53:29 debug3: Ignored env LOGNAME
May 11 11:53:29 debug1: channel 0: setting env LC_CTYPE = "UTF-8"
May 11 11:53:29 debug2: channel 0: request env confirm 0
May 11 11:53:29 debug3: send packet: type 98
May 11 11:53:29 debug3: Ignored env PKG_CONFIG_PATH
May 11 11:53:29 debug3: Ignored env SECURITYSESSIONID
May 11 11:53:29 debug3: Ignored env HISTTIMEFORMAT
May 11 11:53:29 debug3: Ignored env HISTFILE
May 11 11:53:29 debug3: Ignored env _
May 11 11:53:29 debug3: Ignored env __CF_USER_TEXT_ENCODING
May 11 11:53:29 debug2: channel 0: request shell confirm 1
May 11 11:53:29 debug3: send packet: type 98
May 11 11:53:29 debug2: channel_input_open_confirmation: channel 0: callback done
May 11 11:53:29 debug2: channel 0: open confirm rwindow 2621440 rmax 262144
May 11 11:53:29 debug3: receive packet: type 99
May 11 11:53:29 debug2: channel_input_status_confirm: type 99 id 0
May 11 11:53:29 debug2: PTY allocation request accepted on channel 0
May 11 11:53:30 debug3: receive packet: type 99
May 11 11:53:30 debug2: channel_input_status_confirm: type 99 id 0
May 11 11:53:30 debug2: shell request accepted on channel 0
May 11 11:54:30 
May 11 11:54:30 
May 11 11:54:30 
May 11 11:54:30 
May 11 11:54:30 
May 11 11:54:30 
May 11 11:54:30 
May 11 11:54:30 
  MMM      MMM       KKK                          TTTTTTTTTTT      KKK
  MMMM    MMMM       KKK                          TTTTTTTTTTT      KKK
  MMM MMMM MMM  III  KKK  KKK  RRRRRR     OOOOOO      TTT     III  KKK  KKK
  MMM  MM  MMM  III  KKKKK     RRR  RRR  OOO  OOO     TTT     III  KKKKK
  MMM      MMM  III  KKK KKK   RRRRRR    OOO  OOO     TTT     III  KKK KKK
  MMM      MMM  III  KKK  KKK  RRR  RRR   OOOOOO      TTT     III  KKK  KKK
May 11 11:54:30 
  MikroTik RouterOS 6.48 (c) 1999-2020       http://www.mikrotik.com/
May 11 11:54:30 
May 11 11:54:30 [?]             Gives the list of available commands
command [?]     Gives help on the command and list of arguments
May 11 11:54:30 
[Tab]           Completes the command/word. If the input is ambiguous,
                a second [Tab] gives possible options
May 11 11:54:30 
/               Move up to base level
..              Move up one level
/command        Use command at the base level

##
# freeze happens here
#
# ... after many minutes, press Ctrl+C:
##

May 11 11:59:04 debug3: receive packet: type 98
May 11 11:59:04 debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
May 11 11:59:04 ^Cdebug3: receive packet: type 97
May 11 11:59:04 debug2: channel 0: rcvd close
May 11 11:59:04 debug2: channel 0: output open -> drain
May 11 11:59:04 debug2: chan_shutdown_read: channel 0: (i0 o1 sock -1 wfd 6 efd 8 [write])
May 11 11:59:04 debug2: channel 0: input open -> closed
May 11 11:59:04 debug3: receive packet: type 98
May 11 11:59:04 debug1: client_input_channel_req: channel 0 rtype exit-signal reply 0
May 11 11:59:04 debug3: channel 0: will not send data after close
May 11 11:59:04 debug2: channel 0: obuf empty
May 11 11:59:04 debug2: chan_shutdown_write: channel 0: (i3 o1 sock -1 wfd 7 efd 8 [write])
May 11 11:59:04 debug2: channel 0: output drain -> closed
May 11 11:59:04 debug2: channel 0: almost dead
May 11 11:59:04 debug2: channel 0: gc: notify user
May 11 11:59:04 debug2: channel 0: gc: user detached
May 11 11:59:04 debug2: channel 0: send close
May 11 11:59:04 debug3: send packet: type 97
May 11 11:59:04 debug2: channel 0: is dead
May 11 11:59:04 debug2: channel 0: garbage collecting
May 11 11:59:04 debug1: channel 0: free: client-session, nchannels 1
May 11 11:59:04 debug3: channel 0: status: The following connections are open:
May 11 11:59:04   #0 client-session (t4 r0 i3/0 o3/0 e[write]/0 fd -1/-1/8 sock -1 cc -1)
May 11 11:59:04 
    11 11:59:04 debug3: send packet: type 1                                                                          ay 11 11:59:04 debug3: fd 1 is not O_NONBLOCK



May 11 11:59:04 Bytes per second: sent 10.8, received 9.6
May 11 11:59:04 debug1: Exit status 0
2. mac-telnet also hangs (MAC address changed):
[user1@ccr1036-area-fqdn] >  /tool mac-telnet D4:CA:6D:74:61:58
Login: user1
Password: 
Trying D4:CA:6D:FF:FF:FF...
Connected to D4:CA:6D:FF:FF:FF








  MMM      MMM       KKK                          TTTTTTTTTTT      KKK
  MMMM    MMMM       KKK                          TTTTTTTTTTT      KKK
  MMM MMMM MMM  III  KKK  KKK  RRRRRR     OOOOOO      TTT     III  KKK  KKK
  MMM  MM  MMM  III  KKKKK     RRR  RRR  OOO  OOO     TTT     III  KKKKK
  MMM      MMM  III  KKK KKK   RRRRRR    OOO  OOO     TTT     III  KKK KKK
  MMM      MMM  III  KKK  KKK  RRR  RRR   OOOOOO      TTT     III  KKK  KKK

  MikroTik RouterOS 6.48 (c) 1999-2020       http://www.mikrotik.com/

[?]             Gives the list of available commands
command [?]     Gives help on the command and list of arguments

[Tab]           Completes the command/word. If the input is ambiguous,
                a second [Tab] gives possible options

/               Move up to base level
..              Move up one level
/command        Use command at the base level

###
# hangs indefinitely here
###
3. Relevant machine information:
# RouterOS 6.48
# software id = 6VIS-MZ9D
#
# model = CCR1036-8G-2S+
/ip firewall raw
add action=drop chain=prerouting comment=#nope protocol=ipv6-encap
/ip firewall service-port
set ftp disabled=yes
set tftp disabled=yes
set irc disabled=yes
set h323 disabled=yes
set sip disabled=yes
set pptp disabled=yes
set udplite disabled=yes
set dccp disabled=yes
set sctp disabled=yes
/ip service
set telnet disabled=yes
set ftp disabled=yes
set www disabled=yes
set www-ssl certificate=server
set api disabled=yes
set api-ssl certificate=server
/ip ssh
set allow-none-crypto=yes always-allow-password-login=yes forwarding-enabled=\
    remote
4. Unit was upgraded RouterOS 6.44.1 -> RouterOS 6.48 on 2021-01-06.

No configuration changes have been made since the upgrade.

5. Router is still functioning:
- OpenVPN sessions function correctly
- OSPF adjacencies with other routers are correct
- packets being routed and NATed correctly

Any assistance debugging this is much appreciated. I have not rebooted the unit, in case there are any suggestions of things to try to recover it before physical reboot.
 
siriobalmelli
just joined
Topic Author
Posts: 5
Joined: Wed May 09, 2018 1:15 pm

Re: SSH and mac-telnet hang when logging into ROS 6.48  [SOLVED]

Mon May 17, 2021 7:25 pm

Additional info:

1. I was able to log into the device using WinBox

2. From inside WinBox, opening New Terminal gives a blank box which hangs like SSH and Telnet sessions

3. Reading logs in WinBox while attempting to log in via SSH:
publickey accepted for user: user1
user admin logged in from [IP] via ssh
No other suspect log entries.

4. Attaching some device info as screenshots (no way to copy from WinBox UI that I can find).

Possible cause:

1. I *did* notice that the "fancon" user has a very high amount of IRQs. Is this normal?

2. Packages were at version 6.48; I updated to 6.48.2.

3. Firmware was 6.44.1; I updated to 6.48.2

I will update on whether that fixed the issue.
 
siriobalmelli
just joined
Topic Author
Posts: 5
Joined: Wed May 09, 2018 1:15 pm

Re: SSH and mac-telnet hang when logging into ROS 6.48

Wed May 26, 2021 9:44 am

Looks like I'm not the only one seeing the Fancon issue, I've added my info to viewtopic.php?f=3&t=163386&p=859169#p859169

I accepted the previous answer as after firmware upgrade the issue has not reappeared.

If this recurs I will open again.

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