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IPSEC performance

Hi,

We've got a cluster of UTM450's and UTM310's that have an IPSEC tunnel between them. The link is 1gbps, and we've verified we can get 1gbps over a single TCP stream. The IPSEC tunnel is capped at 500mbits though and can't go any higher. We've tested with some cheap Mikrotik routers and have achieved 800mbits. 

I've tested with IPS, Advanced Security, Wifi, etc disabled on both clusters and there has been no difference to performance. 

I've had a ticked open with Sophos support for a couple of months and now the tier 3/developer support are telling me 500mbits is the cap. 

Has anyone been able to get better than 500mbits IPSEC performance from a UTM? 

Thanks in advance.



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