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How to fix ssh connection: POSSIBLE BREAK-IN ATTEMPT

Avoid inputting “yes” when encountering a “POSSIBLE BREAK-IN ATTEMPT” message.

Method 1: Add parameter StrictHostKeyChecking=no

ssh -o StrictHostKeyChecking=no root@192.168.1.100

Method 2: Modify /etc/ssh/ssh_config configuration

StrictHostKeyChecking no

In addition, to prevent such warnings from appearing POSSIBLE BREAK-IN ATTEMPT!

Address 192.168.0.101 maps to localhost, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!

You can change the GSSAPIAuthentication yes in the /etc/ssh/ssh_config configuration file to:

GSSAPIAuthentication no

You can use the sed stream editor to complete the modification:

sed -i 's/#   StrictHostKeyChecking ask/StrictHostKeyChecking no/' /etc/ssh/ssh_config
sed -i 's/GSSAPIAuthentication yes/GSSAPIAuthentication no/' /etc/ssh/ssh_config
service sshd restart
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