Remove macs and ciphers that you don’t want to allow then save the file. You should disable ciphers and macs using the commands below. Macs diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 Edit SSHD Configuration ![]() # sshd -T | grep "\(ciphers\|macs\|kexalgorithms\)" Check existing configurationĬheck allowed ciphers, macs, and key algorithms before disable. I added basic steps about how to change these configurations for Unix and Linux. ![]() Some of the security concerns, you may need to change SSH’s cipher/MAC and key algorithms.
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