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Host machine SSH fingerprints

All our virtual machine hosts have their SSH fingerprints stored as
SSHFP records on our DNS servers.

You can use host key checking in OpenSSH as follows:

patch@desk1 ~ $ ssh -o "VerifyHostKeyDNS=yes" example.vmadmin.bytemark.co.uk
The authenticity of host 'example.vmadmin.bytemark.co.uk (2001:41c8:0:858::49)' can't be established.
RSA key fingerprint is f0:68:18:c3:7a:7d:cc:2c:15:e5:76:8f:bc:93:b3:5a.
Matching host key fingerprint found in DNS.
Are you sure you want to continue connecting (yes/no)? 

“Thanks a million for your help and support this afternoon in diagnosing and fixing the timeout issues we were experiencing - since your latest intervention and update we've not seen a single request fail and the platform appears quite stable ... I'm incredibly grateful for the willingness, speed and skill by which you rolled up your sleeves and dived in to fix the issues.”

Paul Thompson
IMP Media

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