[Openswan Users] key 2048 bit

[Sergey V. Stenkin]

> but to have a 2048-bit key for the vpn connection to the Fortinet I must also change the previous key pair for the above link vpn ?
Yes. You changed your own "leftrsasigkey=0sAQPviNyME0giYwJk5LTtX7...." 
in all connection. See:

ipsec showhostkey --left


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Sergey