I'm sure there are other people who can give a fuller explanation, but: Q1: The software creates this key. Each key is unique for each pi.
Q2 & Q3: I don't know, but you probably don't want to do this for security reasons - the check is used to determine if the host is who it says it is. The error arises because they all use the same IP address - your computer can't distinguish between them so it appears the identity is changing. The solution is probably for them to have different IP addresses I think. Hope this helps, Hamish On 06/09/2019 13:51, PeterMerchant via dorset wrote: > Many times when I try to log-in to a Raspberry Pi via SSH I get the > following message: > > > @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ > @ 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 a host key has just been changed. > The fingerprint for the ECDSA key sent by the remote host is > SHA256:8ayjxAjx4Kar+HObByJH0JBPCfWwAGHytmiNKGxUl90. > Please contact your system administrator. > Add correct host key in /home/peterm/.ssh/known_hosts to get rid of > this message. > Offending ECDSA key in /home/peterm/.ssh/known_hosts:8 > remove with: > ssh-keygen -f "/home/peterm/.ssh/known_hosts" -R "192.168.1.9" > ECDSA host key for 192.168.1.9 has changed and you have requested > strict checking. > Host key verification failed. > > Q1: What is creating this Host key, Is it a combination of the > hardware and the Raspbian OS? > > Q2: How do I change the system so that it is not 'strict checking'? > and [Q3] do I want to as this PC is also used for Internet access? > > All of my Pis use the same IP address for Ethernet connection, and a > different fixed IP address for wireless connection. I only ever > connect one at a time. > > Thanks for your help. > > Peter M. > > -- Next meeting: BEC, Bournemouth, Tuesday, 2019-10-01 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
