Tripp Lite B093-004-2E4U-V Owner's Manual

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15. Advanced Conﬁguration

15.6.6 Fingerprinting

Fingerprints are used to ensure you are establishing an SSH session to who you think you are. On the ﬁrst connection to a

remote server, you will receive a ﬁngerprint that can be used for future connections.

This ﬁngerprint is related to the host key of the remote server. Fingerprints are stored in ~/.ssh/known_hosts.

To receive the ﬁngerprint from the remote server, log in to the client as the required user (usually root) and establish a

connection to the remote host:

# ssh remhost

The authenticity of host ‘remhost (192.168.0.1)’ can’t be established.

RSA key ﬁngerprint is 8d:11:e0:7e:8a:6f:ad:f1:94:0f:93:fc:7c:e6:ef:56.

Are you sure you want to continue connecting (yes/no)?

Answer yes to accept the key. The following message will appear:

Warning: Permanently added ‘remhost,192.168.0.1’ (RSA) to the list of

known hosts.

You may be prompted for a password, though there is no need to log in; you will have received the ﬁngerprint and can Ctrl+C

to cancel the connection. If the host key changes, you will receive the following warning and not be allowed to connect to the

remote host:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@ 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 the RSA host key has just been changed.

The ﬁngerprint for the RSA key sent by the remote host is:

ab:7e:33:bd:85:50:5a:43:0b:e0:bd:43:3f:1c:a5:f8.

Please contact your system administrator.

Add correct host key in /.ssh/known_hosts to get rid of this message.

Offending key in /.ssh/known_hosts:1

RSA host key for remhost has changed and you have requested strict checking.

Host key veriﬁcation failed.

If the host key has been legitimately changed, it can be removed from the ~/.ssh/known_hosts ﬁle with the new ﬁngerprint

added. If it has not changed, this indicates a serious problem that should be investigated immediately.

15.6.7 SSH Tunneled Serial Bridging

You have the option to apply SSH tunneling when two Tripp Lite console servers are conﬁgured for serial bridging.

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Tripp Lite B093-004-2E4U-V 4-Port Console Server with 4G LTE Cellular Gateway, Dual GbE NIC, 4Gb Flash and Dual SIM