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Can switching wifi network cause a ssh server to implicitly change its public and private key pair?



2019 Community Moderator ElectionSSH public key login: two different keys and SSH_AUTH_SOCK behaviourSSH public key authentication works on LAN and not from WANHow are public and private keys used in ssh?How are session keys, public/private keys generated on the ssh server and client and used?Questions about session keys used in sshHow can I prioritize a ssh Forwarded Agent over an Identity File?SSH: Login method using Server's Private Key instead of Client's Public Keys?How are the public and private keys stored and related on both client and server?How can you secure a server?Where are private and public keys stored?










0















I run a vino server on a computer, and run vinagre (with ssh tunneling option) in another computer to connect the vino server.



Then I move both computers from a wifi network to another wifi network.



I run vinagre (with ssh tunneling option) to connect again, why 



Host key verification failed...


?



Is it correct that that message comes from SSH, and means that the server's public key stored on the client host is outdated, because the ssh server has changed its public and private key pair?



Can switching wifi network cause a ssh server to implicitly re-create its public and private key pair?



Thanks.






ssh







share|improve this question






















  • Is it possible that a different server is running per network interface? Also, since you're tunnelling you need to first resolve which host's key is not valid anymore. Thirdly, and most likely, the IP address has changed, and the verification is tied to the IP.

    – l0b0
    3 hours ago












  • Only one server instance is running on the remote computer. I am the only one who can start it.

    – Tim
    3 hours ago












  • Do the two networks assign different IP addresses to the server? Then it may be an effect of the CheckHostIP setting - see for example SSH into a box with a frequently changed IP

    – steeldriver
    2 hours ago











  • Yes, they do. @steeldriver

    – Tim
    2 hours ago















0















I run a vino server on a computer, and run vinagre (with ssh tunneling option) in another computer to connect the vino server.



Then I move both computers from a wifi network to another wifi network.



I run vinagre (with ssh tunneling option) to connect again, why 



Host key verification failed...


?



Is it correct that that message comes from SSH, and means that the server's public key stored on the client host is outdated, because the ssh server has changed its public and private key pair?



Can switching wifi network cause a ssh server to implicitly re-create its public and private key pair?



Thanks.






ssh







share|improve this question






















  • Is it possible that a different server is running per network interface? Also, since you're tunnelling you need to first resolve which host's key is not valid anymore. Thirdly, and most likely, the IP address has changed, and the verification is tied to the IP.

    – l0b0
    3 hours ago












  • Only one server instance is running on the remote computer. I am the only one who can start it.

    – Tim
    3 hours ago












  • Do the two networks assign different IP addresses to the server? Then it may be an effect of the CheckHostIP setting - see for example SSH into a box with a frequently changed IP

    – steeldriver
    2 hours ago











  • Yes, they do. @steeldriver

    – Tim
    2 hours ago













0












0








0








I run a vino server on a computer, and run vinagre (with ssh tunneling option) in another computer to connect the vino server.



Then I move both computers from a wifi network to another wifi network.



I run vinagre (with ssh tunneling option) to connect again, why 



Host key verification failed...


?



Is it correct that that message comes from SSH, and means that the server's public key stored on the client host is outdated, because the ssh server has changed its public and private key pair?



Can switching wifi network cause a ssh server to implicitly re-create its public and private key pair?



Thanks.






ssh







share|improve this question














I run a vino server on a computer, and run vinagre (with ssh tunneling option) in another computer to connect the vino server.



Then I move both computers from a wifi network to another wifi network.



I run vinagre (with ssh tunneling option) to connect again, why 



Host key verification failed...


?



Is it correct that that message comes from SSH, and means that the server's public key stored on the client host is outdated, because the ssh server has changed its public and private key pair?



Can switching wifi network cause a ssh server to implicitly re-create its public and private key pair?



Thanks.






ssh




ssh






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked 3 hours ago









TimTim

27.6k78264480




27.6k78264480












  • Is it possible that a different server is running per network interface? Also, since you're tunnelling you need to first resolve which host's key is not valid anymore. Thirdly, and most likely, the IP address has changed, and the verification is tied to the IP.

    – l0b0
    3 hours ago












  • Only one server instance is running on the remote computer. I am the only one who can start it.

    – Tim
    3 hours ago












  • Do the two networks assign different IP addresses to the server? Then it may be an effect of the CheckHostIP setting - see for example SSH into a box with a frequently changed IP

    – steeldriver
    2 hours ago











  • Yes, they do. @steeldriver

    – Tim
    2 hours ago

















  • Is it possible that a different server is running per network interface? Also, since you're tunnelling you need to first resolve which host's key is not valid anymore. Thirdly, and most likely, the IP address has changed, and the verification is tied to the IP.

    – l0b0
    3 hours ago












  • Only one server instance is running on the remote computer. I am the only one who can start it.

    – Tim
    3 hours ago












  • Do the two networks assign different IP addresses to the server? Then it may be an effect of the CheckHostIP setting - see for example SSH into a box with a frequently changed IP

    – steeldriver
    2 hours ago











  • Yes, they do. @steeldriver

    – Tim
    2 hours ago
















Is it possible that a different server is running per network interface? Also, since you're tunnelling you need to first resolve which host's key is not valid anymore. Thirdly, and most likely, the IP address has changed, and the verification is tied to the IP.

– l0b0
3 hours ago






Is it possible that a different server is running per network interface? Also, since you're tunnelling you need to first resolve which host's key is not valid anymore. Thirdly, and most likely, the IP address has changed, and the verification is tied to the IP.

– l0b0
3 hours ago














Only one server instance is running on the remote computer. I am the only one who can start it.

– Tim
3 hours ago






Only one server instance is running on the remote computer. I am the only one who can start it.

– Tim
3 hours ago














Do the two networks assign different IP addresses to the server? Then it may be an effect of the CheckHostIP setting - see for example SSH into a box with a frequently changed IP

– steeldriver
2 hours ago





Do the two networks assign different IP addresses to the server? Then it may be an effect of the CheckHostIP setting - see for example SSH into a box with a frequently changed IP

– steeldriver
2 hours ago













Yes, they do. @steeldriver

– Tim
2 hours ago





Yes, they do. @steeldriver

– Tim
2 hours ago










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