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Mike Spragg

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Mike Spragg last won the day on July 8 2021

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  1. Hi, not sure what's happening here. Original issue was that 10.4.1 doesn't work with 7.0 U2. However, upon checking and reverting the changes I'd made previously in March to support 10.4.0 and 7.0 U2 it now works. So, there's nothing further to do here. All good !
  2. Hi, yes - it is the free ESXi version (not full vSphere). Actually, the limitations were there up until v10.4.0 and you had to make changes to 'sshd_config' to make it work - however, with the v10.4.1 release those limitations were removed and customers who had already made this change need to revert back to the ordinary/vmware supplied sshd_config - otherwise, it no longer works and has issues with inventory on VMWare. In other words, in 10.4.1 you fixed the original bug that required VMWare to be run with less security for SSH than VMWare was expecting.
  3. These are the particular lines that need reverting back: KexAlgorithms 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 HostKeyAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,rsa-sha2-256,rsa-sha2-512 Ciphers aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr MACs hmac-sha2-256,hmac-sha2-512
  4. Problem resolved - if you applied the March fix (adjust sshd_config) then you need to revert those changes as per enclosed. Once done, stop/start ESXi ssh service and all works fine Unfortunately, I can't attach the file but here it is below as text. # Version 7.0.2.1 # running from inetd # Port 22 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_ecdsa_key # Fips mode restricts ciphers to only FIPS-permitted ciphers FipsMode yes # vPP FCS_SSH_EXT.1.7: rekey after 1GB, 1H (instead of default 4GB for AES) RekeyLimit 1G, 1H SyslogFacility auth LogLevel info PermitRootLogin yes PrintMotd yes TCPKeepAlive yes # Key algorithms used in SSHv2 handshake # (ed25519 not allowed by current FIPS module) KexAlgorithms 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 HostKeyAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,rsa-sha2-256,rsa-sha2-512 Ciphers aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr MACs hmac-sha2-256,hmac-sha2-512 UsePAM yes # only use PAM challenge-response (keyboard-interactive) PasswordAuthentication no Banner /etc/issue Subsystem sftp /usr/lib/vmware/openssh/bin/sftp-server -f LOCAL5 -l INFO AuthorizedKeysFile /etc/ssh/keys-%u/authorized_keys # Timeout value of 10 mins. The default value of ClientAliveCountMax is 3. # Hence, we get a 3 * 200 = 600 seconds timeout if the client has been # unresponsive. ClientAliveCountMax 3 ClientAliveInterval 200 # sshd(8) will refuse connection attempts with a probability of "rate/100" # (30%) if there are currently "start" (10) unauthenticated connections. The # probability increases linearly and all connection attempts are refused if the # number of unauthenticated connections reaches "full" (100) MaxStartups 10:30:100 # ESXi is not a proxy server AllowTcpForwarding no AllowStreamLocalForwarding no # The following settings are all default values. They are repeated # here to simplify auditing settings (for example, DoD STIG). IgnoreRhosts yes HostbasedAuthentication no PermitEmptyPasswords no PermitUserEnvironment no StrictModes yes Compression no GatewayPorts no X11Forwarding no AcceptEnv PermitTunnel no # The following settings are disabled during the OpenSSH build. # They are commented out to avoid spurious warnings in log files. #GSSAPIAuthentication no #KerberosAuthentication no
  5. As per topic - looks like the old (March 2021) bug is back - can't connect to inventory. This is via QNAP (.qpkg). Anyone else seeing this - have raised ticket.
  6. Either remotely collect it using Win SCP and edit it locally. Or use Vi. You just alter the 3 lines shown in the thread. You can do it remotely if you can ssh into box remotely (switch this on in VMWare).
  7. Hi - is it possible that this article is modified - it doesn't say what to change only what requirements are and a little vague. Just needs direction to modify /etc/ssh/sshd_config and to modify those lines mentioned above e.g. KexAlgorithms 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-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 HostKeyAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,rsa-sha2-256,rsa-sha2-512,ssh-rsa,ssh-dss Ciphers aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr MACs hmac-sha2-256,hmac-sha2-512,hmac-sha1-96,hmac-sha1,hmac-md5-96,hmac-md5 This adds the right KexAlgorithm, HostKeyAlgorithms and Ciphers That way, it's more specific to the solution. Thanks !!
  8. That's not the relevant part - the "file" (as I can't attach it) are shown above - you only need to modify the lines: KexAlgorithms 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-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 HostKeyAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,rsa-sha2-256,rsa-sha2-512,ssh-rsa,ssh-dss Ciphers aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr MACs hmac-sha2-256,hmac-sha2-512,hmac-sha1-96,hmac-sha1,hmac-md5-96,hmac-md5 This adds the right KexAlgorithm, HostKeyAlgorithms and Ciphers (the original shows what they are now in 7.0U1) The file you need to modify is /etc/ssh/sshd_config
  9. Correct, you didn't. In 7.0U2 they [VMWare] uprated/hardened the security requirements through ssh. By doing this change you've reverted that change by VMWare.
  10. Thank you ! I hit this problem pretty much straight away as soon as 10.3 came out. Unfortunately, there is a down side insofar as you are weakening what was a hardened system so hopefully fixed in 10.4 without the need to do this.
  11. You have to modify VMWare itself: https://helpcenter.nakivo.com/display/KB/SSH+Requirements+for+NAKIVO+Backup+and+Replication without the mods to sshd_config - it will never see it. KexAlgorithms HostKeyAlgorithms Ciphers I've include the original and replacement files. Changed: # Version 7.0.2.1 # running from inetd # Port 22 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_ecdsa_key # Fips mode restricts ciphers to only FIPS-permitted ciphers FipsMode yes # vPP FCS_SSH_EXT.1.7: rekey after 1GB, 1H (instead of default 4GB for AES) RekeyLimit 1G, 1H SyslogFacility auth LogLevel info PermitRootLogin yes PrintMotd yes TCPKeepAlive yes # Key algorithms used in SSHv2 handshake # (ed25519 not allowed by current FIPS module) KexAlgorithms 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-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 HostKeyAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,rsa-sha2-256,rsa-sha2-512,ssh-rsa,ssh-dss Ciphers aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr MACs hmac-sha2-256,hmac-sha2-512,hmac-sha1-96,hmac-sha1,hmac-md5-96,hmac-md5 UsePAM yes # only use PAM challenge-response (keyboard-interactive) PasswordAuthentication no Banner /etc/issue Subsystem sftp /usr/lib/vmware/openssh/bin/sftp-server -f LOCAL5 -l INFO AuthorizedKeysFile /etc/ssh/keys-%u/authorized_keys # Timeout value of 10 mins. The default value of ClientAliveCountMax is 3. # Hence, we get a 3 * 200 = 600 seconds timeout if the client has been # unresponsive. ClientAliveCountMax 3 ClientAliveInterval 200 # sshd(8) will refuse connection attempts with a probability of "rate/100" # (30%) if there are currently "start" (10) unauthenticated connections. The # probability increases linearly and all connection attempts are refused if the # number of unauthenticated connections reaches "full" (100) MaxStartups 10:30:100 # ESXi is not a proxy server AllowTcpForwarding no AllowStreamLocalForwarding no # The following settings are all default values. They are repeated # here to simplify auditing settings (for example, DoD STIG). IgnoreRhosts yes HostbasedAuthentication no PermitEmptyPasswords no PermitUserEnvironment no StrictModes yes Compression no GatewayPorts no X11Forwarding no AcceptEnv PermitTunnel no # The following settings are disabled during the OpenSSH build. # They are commented out to avoid spurious warnings in log files. #GSSAPIAuthentication no #KerberosAuthentication no Original # Version 7.0.2.1 # running from inetd # Port 22 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_ecdsa_key # Fips mode restricts ciphers to only FIPS-permitted ciphers FipsMode yes # vPP FCS_SSH_EXT.1.7: rekey after 1GB, 1H (instead of default 4GB for AES) RekeyLimit 1G, 1H SyslogFacility auth LogLevel info PermitRootLogin yes PrintMotd yes TCPKeepAlive yes # Key algorithms used in SSHv2 handshake # (ed25519 not allowed by current FIPS module) KexAlgorithms 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 HostKeyAlgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,rsa-sha2-256,rsa-sha2-512 Ciphers aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr MACs hmac-sha2-256,hmac-sha2-512 UsePAM yes # only use PAM challenge-response (keyboard-interactive) PasswordAuthentication no Banner /etc/issue Subsystem sftp /usr/lib/vmware/openssh/bin/sftp-server -f LOCAL5 -l INFO AuthorizedKeysFile /etc/ssh/keys-%u/authorized_keys # Timeout value of 10 mins. The default value of ClientAliveCountMax is 3. # Hence, we get a 3 * 200 = 600 seconds timeout if the client has been # unresponsive. ClientAliveCountMax 3 ClientAliveInterval 200 # sshd(8) will refuse connection attempts with a probability of "rate/100" # (30%) if there are currently "start" (10) unauthenticated connections. The # probability increases linearly and all connection attempts are refused if the # number of unauthenticated connections reaches "full" (100) MaxStartups 10:30:100 # ESXi is not a proxy server AllowTcpForwarding no AllowStreamLocalForwarding no # The following settings are all default values. They are repeated # here to simplify auditing settings (for example, DoD STIG). IgnoreRhosts yes HostbasedAuthentication no PermitEmptyPasswords no PermitUserEnvironment no StrictModes yes Compression no GatewayPorts no X11Forwarding no AcceptEnv PermitTunnel no # The following settings are disabled during the OpenSSH build. # They are commented out to avoid spurious warnings in log files. #GSSAPIAuthentication no #KerberosAuthentication no
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