> > We currently have a bunch of Juniper firewalls to handle
> > our VPN tunnels. We are pretty happy with them, but they
> > tend to max out at around 100-200 tunnels each because of
> > limitations in CPU performance. I would like to find a
> > good Linux alternative because I'm thinking that we should
> > be able to cram 500 tunnels onto a multi-core Xeon server
> > pretty comfortably.
> presumably your estimate is based on the known load for a
> given (smaller) number of tunnels?
It is based on known load for that number of tunnels. We have NetScreen
100 firewalls and NetScreen 500 firewalls in production. The model 100's
tend to hover around 60% CPU with active 120 active tunnels. The model
500's are running 40-50% CPU with ~200 active tunnels. Bandwidth
utilization is about 10Mbps of AES128 traffic.
> You'd need good nics with offload etc.
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