Skip to main content

Host Key Verification Failed

Most of the time we may encounter following error. Such a error may occur if remote host may change or regenerated the RSA key. So how to solved the issue.
jpudasaini@Gnome:~/Downloads$ ssh root@10.0.2.37
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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
f3:30:b1:66:ea:0d:e4:06:2e:10:8b:ca:df:33:fa:34.
Please contact your system administrator.
Add correct host key in /home/jpudasaini/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /home/jpudasaini/.ssh/known_hosts:17
  remove with: ssh-keygen -f "/home/jpudasaini/.ssh/known_hosts" -R 10.0.2.37
ECDSA host key for 10.0.2.37 has changed and you have requested strict checking.
Host key verification failed.
This error will happen due to the remote host change the host key.
ssh-keygen -R 10.0.2.37
jpudasaini@Gnome:~$ cd /home/jpudasaini/.ssh/
jpudasaini@Gnome:~/.ssh$ ls
known_hosts  known_hosts.old
jpudasaini@Gnome:~/.ssh$ sudo vi known_hosts
[sudo] password for jpudasaini:  (type your password)

Delete line 17 form opened file or

jpudasaini@Gnome:~$sed -i 17d ~/ssh/known_hosts

This will delete line 17 in the /ssh/known_hosts file

Now you retry to login to the remote host. Accept new key and ready to go.

Comments

Popular posts from this blog

Unable to open kernel device . global vmx86 windows 7

Suddenly I encounter a weird problem with VMware 9 version. I install different OS for my education and testing purposed. Like MAC os, Ubuntu, CentOS, BT, WinXP, Win-server 2003. When I tried to run one of this OS a error message appear. unable to open kernel device "\\.Global\vmx86": The system cannot find the file specified. Did you reboot after installing VMware Workstation? Failed to initialize monitor device. Click ok you can see this window After googling I found one solution in developer forum but thread starter never use that method. So I tried it and here is my finding. Go to the directory of vmware installed  (In my case I run it as Administrator) C:\Program Files (x86)\VMware\VMware Workstation>   ( I've 32-bit apps on 64-bit OS, your may be different) Run this command vnetlib -- uninstall vmx86  reboot Go to the same directory and check net start command - this time it should say "service name  is invalid&quo

Simple Failover Mikrotik

Simple fail-over Mikrotik router configuration. Most of the user wants backup link (Fiber link with Wireless backup), in case fiber down wireless link auto up. No downtime for the user. Here is simple setting on Mikrotik for fail-over. I'm very great full to Anton to point out the mistake in src-address. It has been corrected now. ****default routes for new outgoing traffic.**** /ip route add dst-address=0.0.0.0/0 gateway=ISP-GW-ADDR-1 distance=1 check-gateway=ping add dst-address=0.0.0.0/0 gateway=ISP-GW-ADDR-2 distance=2 ++masquerade both WAN connections++ /ip firewall nat add chain=srcnat src-address=192.168.0.0/24 out-interface=WAN-1 action=masquerade add chain=srcnat src-address=192.168.0.0/24 out-interface=WAN-2 action=masquerade Thats it.

Mikrotik SXT 5nD r2 setup in bridge mode

How to connect two Mikrotik RouterBoard SXT 5nD r2 devices together in Bridge Mode Upgrading you SXT's to the Latest version of RouterOS Doing a Bandwidth Test between two RouterBoard SXT-5nD's Mikrotik routerboard default IP is 192.168.88.1 You can connect with routerboard by WinBox through IP and MAC address. You need to download WinBox from mikrotik website. By default routerboard have Admin as username and blank password. If you want to connect with device through IP then don't forget to add same network address into your pc NIC, otherwise connection isn't established. Else you can connect through MAC so choose MAC address from Elipsis next to " connect " field. When you login, "RouterOS Default configuration" screen is popup. click okay. Do same for other device to login to routerOS If you followed the process then you already open both device. Now you can set a HostName for those devices. Click on the system button o