Tuesday, April 24, 2018

IPSec throughput speed

Hi Everyone,

Just a question on how to maximize throughput in IPSec tunneling. I have two Fortigate 200D devices utilizing IPSec site to site. Now I used iperf to see their speed and its a mix between 25-30 mbps to 10mbps at certain times. I checked the phase 1 and 2 protocols and even minimized the amount of encryption algorithms it would use to talk to one another. For these devices it says the maximum throughput should be 1.3 Gbps and the two locations these devices are in have 1GB pipes up and down. Now obviously it wont use the max 1GB pipe but I imagine that floating 25mbps is really slow in comparison to what the data sheet indicates.

Anyone have an idea what may be the issue? Also if anyone has had this similar situation before with similar devices? With the Cisco ASA's it was pretty straight forward so I'm a bit confused myself.



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