How do you disable weak key exchange algorithms?

How do you disable weak key exchange algorithms?

Answer

1. Log in to the sensor with the root account via SSH or console connection.
2. Edit the /etc/ssh/sshd_config file and add the following line: Ciphers aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc.
3. Restart the sshd service to make the changes take effect:

How do I disable HMAC-md5?

You can disable support for MD5 MAC in SSH2 SFTP by unchecking the hmac-md5 option under the Active MAC List (SSH2 HMAC List in Cerberus 9 and below) on the Protocols page (Security > Advanced in Cerberus 9 and below).

How do I disable SSH on MAC?

If you want to toggle SSH off and on and avoid the command line, you can do so by enabling Remote Login in the Sharing preference panel on a Mac, or stop the server by leaving it unchecked.

How to disable MD5 based HMAC algorithm’s for SSH?

How To Disable MD5-based HMAC Algorithm’s for SSH 1 Make sure you have updated openssh package to latest available version. 2 To change the ciphers/md5 in use requires modifying sshd_config file, you can append Ciphers & MACs with options as per the man page. 3 Restart the sshd service.

Which is the weakest MAC algorithm for SSH?

The remote SSH server is configured to allow either MD5 or 96-bit MAC algorithms, both of which are considered weak. Note that this plugin only checks for the options of the SSH server, and it does not check for vulnerable software versions. Follow the steps given below to disable ssh weak MAC algorithms in a Linux server:

How to disable weak MAC algorithms in Linux?

Follow the steps given below to disable ssh weak MAC algorithms in a Linux server: Edit the default list of MACs by editing the /etc/ssh/sshd_config file and remove the hmac-md5 hmac-md5-96 hmac-sha1-96 MACs from the list.

Is there a vulnerability in the SSH server?

Our internal network security team has idntified Vulnerability regarding the SSH server within the catalyst switches.As per the Vulnerability team SSH is configured to allow MD5 and 96-bit MAC algorithms for client to server communication.These Algorithms are assumed to be weak by