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Forum Discussion
SRX5308 L2TP/IPSec VPN on Windows 10 - Slow Throughput
I have an SRX5308 running firmware v4.3.5-3 and a VPN setup based on the configuration provided by train_wreck in this thread. WAN1 is on a fiber connection that reliably tests at 500/25 Mbps. The remote Windows 10 laptop tests at 100/15 Mbps.
The problem I am experiencing is that VPN throughput is speed testing at an abysmal 3/5 Mbps. File transfers from the box to the client run anywhere from 300 to 700 Kbps. I attempted adjusting the MTU according to this Netgear KB article, which doesn't matter much because Windows 10 automatically places an MTU limit of 1400 on VPN connections.
After a full day of tweaking, testing, and troubleshooting, I'm at a loss and would appreciate any assistance in getting this issue resolved.
4 Replies
Did you find a solution for your vpn throughput problem? I am experiencing the same issue with my VPN.
Thanks.
Thanks HRC_ITguy, appreciate the response.
I did come across this article about changing the MTU size: https://community.netgear.com/t5/Hardware-VPN-Firewalls-and/VPN-Performance/td-p/1279557. Not sure if you tried this but I'm looking into it for my network. I'll post back after I test the changes.
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