![]() If it did improve, it probably was only in the VPN client -> main site direction and if so it is definitely a MTU issue and we can discuss next steps. Did the performance change substantially? If it didn't, it is not a MTU issue. We have autodetect set for endpointvpnipsectransport in Guidbedit Firewall properties. Be sure to test and benchmark the speed of traffic through the VPN in both directions: upload a large file from the VPN client to the main network, and download a large file from the main network to the VPN client. Be sure to test and benchmark the speed of traffic through the VPN in both directions: upload a large file from the VPN client to the main network, and download a large file from the main network to the VPN client.Ģ) On the VPN client, lower the MTU on the main LAN adapter from 1500 to 1360 using the instructions here: ģ) Benchmark performance through the VPN again. ![]() Try this as a test:ġ) Benchmark performance through the VPN. Unfortunately you can't use SSL/TLS as the transport for Endpoint Security which is more tolerant of network conditions such as these. Endpoint Security uses IPSec for the transport instead of SSL/TLS, and as such can be affected by inconsistent MTU sizes.
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