About multiple hosts with same hostname

[Flavien]

Hi,



Christian Iversen wrote:
> However, when we go to our customers' sites, we often issue commands 
> like "ssh user at fw0", which of course gives out endless warnings about 
> MITM attacks, and essentially makes host keys worthless on the internal 
> customer networks.
> 
> It seems somewhat wrong to me. Isn't there some way to make OpenSSH save 
> the host key using the FQDN instead of just the local part?


What about a trick like :
    $ tail -2 .ssh/config
    Host fw0
    Hostname fw0.client3.toto.org#CLIENTDOMAIN
    $ switch-ssh client2.org
    $ tail -2 .ssh/config
    Host fw0
    Hostname fw0.client2.org#CLIENTDOMAIN

"switch-ssh" can be a script or even an alias in your shell, that
does :
sed -i \
    "s/^Hostname *\([^.]*\).*#CLIENTDOMAIN/Hostname \1.$1#CLIENTDOMAIN/" \
    .ssh/config

Hope this helps,

Flavien.