Difference between revisions of "Ssh Ciphers"
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(Created page with "ssh -Q kex host.example.com ssh -Q cipher host.example.com You can manually try ciphers and then end up using something like sftp -c aes256-cbc -oKexAlgorithms=diffie-hellman...") |
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| + | https://www.thegeekdiary.com/how-to-disable-weak-cipher-and-insecure-hmac-algorithms-in-ssh-services-in-centos-rhel-8/ | ||
| + | |||
| + | ``` | ||
ssh -Q kex host.example.com | ssh -Q kex host.example.com | ||
ssh -Q cipher host.example.com | ssh -Q cipher host.example.com | ||
| + | ``` | ||
You can manually try ciphers and then end up using something like | You can manually try ciphers and then end up using something like | ||
sftp -c aes256-cbc -oKexAlgorithms=diffie-hellman-group14-sha1host.example.com | sftp -c aes256-cbc -oKexAlgorithms=diffie-hellman-group14-sha1host.example.com | ||
but it's better to just update server to support newer ciphers. | but it's better to just update server to support newer ciphers. | ||
| + | |||
| + | ``` | ||
| + | sudo sshd -T | grep "\(ciphers\|macs\|kexalgorithms\)" | ||
| + | Raw | ||
| + | sshd -T shows full SSHD config file | ||
| + | Also you could try nmap as well: | ||
| + | |||
| + | Raw | ||
| + | nmap -vv --script=ssh2-enum-algos.nse localhost | ||
| + | Or another: | ||
| + | |||
| + | Raw | ||
| + | gnutls-cli -l | ||
| + | Or: | ||
| + | |||
| + | Raw | ||
| + | ssh -Q mac | ||
| + | Raw | ||
| + | ssh –vv Servername ciphers listed | ||
| + | ssh –Q kex | ||
| + | ssh -Q cipher | ||
| + | ssh -Q cipher-auth | ||
| + | ssh -Q mac | ||
| + | ssh -Q kex | ||
| + | ssh -Q key | ||
| + | ``` | ||
Latest revision as of 22:50, 18 February 2022
ssh -Q kex host.example.com ssh -Q cipher host.example.com
You can manually try ciphers and then end up using something like sftp -c aes256-cbc -oKexAlgorithms=diffie-hellman-group14-sha1host.example.com but it's better to just update server to support newer ciphers.
sudo sshd -T | grep "\(ciphers\|macs\|kexalgorithms\)" Raw sshd -T shows full SSHD config file Also you could try nmap as well: Raw nmap -vv --script=ssh2-enum-algos.nse localhost Or another: Raw gnutls-cli -l Or: Raw ssh -Q mac Raw ssh –vv Servername ciphers listed ssh –Q kex ssh -Q cipher ssh -Q cipher-auth ssh -Q mac ssh -Q kex ssh -Q key