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The Computer Science OpenStack Cluster’s networking runs using a Private IPv4 subnet, this means that external networkĪccess (Internet) it’s not allowed directly to the VMs, and this protects the VMs further from internet attacks, etc., Make sure you don’t expose any sensitive or private information from your application (the one listening on the network port) This setting and many more can be configured in an sshĬonfiguration file an example is included below.Ĭreating a firewall rule could lead to unauthorized access to non-secured applications that are listening on a socket. Now you can run graphical applications on your VM and see them on Receive forwarded X Windows connections over SSH, add -Y as a flag to the If you are connecting from a machine running an X server able to SSH has the advantages of speed and accessibility, but it lacks a graphical user The check and create a new entry for your VM. Is the line we need to remove from that text file, in this way our ssh client will not fail Then it’s safe to edit the file (in this case) /Users/username/.ssh/known_hostsĪnd as can be seen line 1 ( Offending ECDSA key in /Users/username/.ssh/known_hosts:1) Of the semester, if this happens the first time you are connecting to it

This is normally due to the fact that your VM was recreated at the start Offending ECDSA key in /Users/username/.ssh/known_hosts:1 ECDSA host key for linkblue.cs.uky.edu has changed and you have requested strict checking. Add correct host key in /Users/username/.ssh/known_hosts to get rid of this message. Please contact your system administrator. WARNING: POSSIBLE DNS SPOOFING DETECTED! The ECDSA host key for linkblue.cs.uky.edu has changed, and the key for the corresponding IP address 172.31.112.111 is unknown.