Hot!Download speed half of expected through FortiGate 60F

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swang
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2021/04/16 11:43:14 (permalink)
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Download speed half of expected through FortiGate 60F

I read several threads with similar or related issues, but the threads are several years old.
 
AT&T just installed 1G fiber in our office.  If I connect my laptop directly to the AT&T gateway and do a speed test at speedtest.net, I see 900/900M.  If I connect the same laptop to the Fortinet, I see 450/900M.  Fortinet support has reviewed the (very basic) 60F config in detail and cannot find anything in the config that should affect the download speed. We've checked speed, duplex, MTU, policies, and even tried different ports to rule out hardware failure.
 
In one of the older threads on this forum, someone said to use fast.com (and increase the number of parallel connections) instead of speedtest.net.  I'm not onsite to try this, but could this really be the issue?  Does anyone have experience with this?
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    rmeicher
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    Re: Download speed half of expected through FortiGate 60F 2021/04/17 16:44:01 (permalink)
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    Same issue here with the AT&T 1G.  Was better with the AT&T Speed Test and best with the Google Speed Test.  You'd think AT&T's test would be the best.  What do you get with the Google test?
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    Yurisk
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    Re: Download speed half of expected through FortiGate 60F 2021/04/17 23:01:48 (permalink)
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    Unfortunately, speedtest-alike sites measuring is not a good indicator of actual speed the device can reach as those websites employ heavy session/TCP mangling which firewall (not only Fortigate) may not play along. 
    The reliable way to measure is using iperf  - first the one built-in in the Fortigate, then from the laptop behind the Fortigate. Preferably against iperf server on the ISP/Provider side if they are willing to provide one (I have one always ready for our clients for such tests).
    Example of how to use it: https://yurisk.info/2020/01/24/fortigate-iperf-traffic-test-built-in-client-cli/
     

    Yuri
    https://yurisk.info/ blog: All things Fortinet, no ads.
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    SuBDivisions
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    Re: Download speed half of expected through FortiGate 60F 2021/05/05 17:14:26 (permalink)
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    I just installed the 60F on my Gigabit Fios, replacing a Netgear SRX5308 (about 10 years old) which had a 960 Meg Firewall Rating (the 60F is 1 Gig), and my speed tests are all over the map..  Without it im getting 900/900 as well.. I have no security services on, i expected the same if not a little better performance over the netgear (I also tried a ZyTel VPN 100, but it maxed out at 700 Meg).. Im getting 800, 850, 750 down, Up is 400, 500, Sometimes 800.. its al l over the place.. Trying to figure it out now.
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