The remote SSH server is configured to allow weak encryption algorithms.

Add the following lines in /etc/ssh/sshd_config

Ciphers aes128-ctr,aes192-ctr,aes256-ctr
MACs hmac-sha1,umac-64@openssh.com,hmac-ripemd160

Now check with below command

THAT'S ALL

Following command is for your ssh configuration to find the correction.

ssh -vvv -F /etc/ssh/sshd_config root@192.168.1.1


If it's shows everything ok then no issue otherwise


it will show like this


/etc/ssh/sshd_config: line 28: Bad configuration option: hostkey
/etc/ssh/sshd_config: line 30: Bad configuration option: hostkey
/etc/ssh/sshd_config: line 31: Bad configuration option: hostkey
/etc/ssh/sshd_config: line 43: Bad configuration option: syslogfacility
/etc/ssh/sshd_config: line 49: Bad configuration option: permitrootlogin
/etc/ssh/sshd_config: line 59: Bad configuration option: authorizedkeysfile
/etc/ssh/sshd_config: line 94: Bad configuration option: gssapicleanupcredentials
/etc/ssh/sshd_config: line 110: Bad configuration option: usepam
/etc/ssh/sshd_config: line 115: Bad configuration option: x11forwarding
/etc/ssh/sshd_config: line 123: Bad configuration option: useprivilegeseparation
/etc/ssh/sshd_config: line 140: Bad configuration option: acceptenv
/etc/ssh/sshd_config: line 141: Bad configuration option: acceptenv
/etc/ssh/sshd_config: line 142: Bad configuration option: acceptenv
/etc/ssh/sshd_config: line 143: Bad configuration option: acceptenv
/etc/ssh/sshd_config: line 146: Bad configuration option: subsystem


Now add # the following lines that above mentioned.