For my research and during my free time I’m managing and using multiple GNU/Linux machines over SSH so I decided to try the Google Two Factor Authentication. Google Authenticator is a completely open source project, this means that you can compile the sources from scratch, contribute to the project, or even examine and read the […]
Also tagged google, two factor authenticationTo manage my multiple machines and test computers on my local network I use SSH, and often after reinstalling a test machine I want to connect back by SSH and my Mac just pops me back this message :
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noktec:release Noktec$ ssh xavier@192.168.0.2 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that the RSA host key has just been changed. The fingerprint for the RSA key sent by the remote host is ******************************** Please contact your system administrator. Add correct host key in /Users/Noktec/.ssh/known_hosts to get rid of this message. Offending key in /Users/Noktec/.ssh/known_hosts:12 RSA host key for 192.168.0.2 has changed and you have requested strict checking. Host key verification failed. |
I usually find this message quiet annoying, but knows the commands to avoid this problem, […]
Also tagged key, known_hosts, removeThis solution applies if you want to receive an e-mail when one connects to your server via SSH. open a command line and type in :
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vim ./.bashrc |
at the end of the file add the following command :
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# Email Notification on ssh connexion echo 'NOTIFICATION - SSH acces in USERNAME on `hostname` the:' `date` `who` | mail -s "NOTIFICATION - Connexion ssh from : `who | cut -d"(" -f2 | cut -d")" -f1`" your_email@email.com |
When one will now connect to your server, you will receive an advertisement e-mail.
Also tagged connection, e-mail
