[CentOS] regarding vpn server for 1500 clients

> If you could use a lower CPU intensive crypt like blowfish, it would be easier.
>
> Are all these trading partners in different locations or are there semi large
> groups in the same locations?
>   
all these are end users.
they connect software from home / offices.
> Maybe a hundred or so share an office, you could set up IPSec tunnels to each
> remote office and pass all 100 through that tunnel. It takes a lot less CPU to
> pass 100 combined then 100 separate connections.
>
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