Chris <[email protected]> writes:

> I've recently enabled VisualHostKey yes in my .ssh/config file. I
> would like to hear from people who are using it and how they are
> finding it useful.

Not much to say, really.  The assumption that the ASCII-art picture
gives you a fairly unique shape per host that stands out more than a
change in a string of hex digits seems to be correct at least in my case.

One practical example - if you're used to seeing 

    Host key fingerprint is 67:88:39:bd:7f:3c:df:a5:47:87:de:bd:9b:5e:7b:55

and one morning when you've had way too little coffee you may not
notice anything different if the machine greets you with

Host key fingerprint is 4b:b3:3e:54:54:ae:f0:0f:8d:28:10:d2:db:53:77:3f

but you likely would notice the difference between


+--[ RSA 1024]----+
|                 |
|                 |
|                 |
|       + .      E|
|      + S o    ..|
|       . +    . +|
|        .  . . o*|
|         .  + .oX|
|          .. o+B=|
+-----------------+

and

+--[ RSA 1024]----+
|  ...      ..    |
|   ...  . o..    |
|    .o ..o ...   |
|    ..o  +.+  E  |
|      ..S.= .  . |
|       o.+ o     |
|       .o   .    |
|       ..        |
|        ..       |
+-----------------+

(both actual samples from machines in my care)

so yes, I think it's a helpful feature.

- Peter
-- 
Peter N. M. Hansteen, member of the first RFC 1149 implementation team
http://bsdly.blogspot.com/ http://www.bsdly.net/ http://www.nuug.no/
"Remember to set the evil bit on all malicious network traffic"
delilah spamd[29949]: 85.152.224.147: disconnected after 42673 seconds.

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