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SSL VPN (Remote Access) Performance Issues - Tunnel Access, DNS and Speed

I have successfully installed and configured the SSL VPN client on a few users' laptops. However, I am getting some complaints regarding performance. Should "Use as default gateway" be enabled or disabled? If I want to allow access to devices on the local network should I be using the local DNS as the primary DNS server? I have also noticed that the Sophos SSL VPN Ethernet adapter is using a fast Ethernet connection, is it possible to change this to use gigabit?

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0 LuCar Toni over 6 years ago

SSL VPN Performance issues can be related in various reasons.

How did you measure the performance? Would suggest to perform some tests with a stabile connection at home and test, what your actual performance is.

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0 LuCar Toni over 6 years ago

SSL VPN Performance issues can be related in various reasons.

How did you measure the performance? Would suggest to perform some tests with a stabile connection at home and test, what your actual performance is.

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0 Randy Wade over 6 years ago in reply to LuCar Toni

I am measuring performance based on the users' experience accessing their AutoCad drawings from our local file server. All of our remote employees utilize the VPN strictly for our file server, and the performance is so bad that they can barely open the files. We have a good internet speed, but I noticed that the SSL client will only use a fast Ethernet network connection, as opposed to a gigabit. Do you know if there is any other client that can be utilized?
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0 LuCar Toni over 6 years ago in reply to Randy Wade

Even if the Adapter would be a problem (100 mbit/s vs 1 gbit/s), that should not be noticeable.

Do you have 100 mbit / 1 gbit/s upload on your XG?

I would say, there is maybe a MTU size issue.

There is a page on the OpenVPN Community about optimization.

Many of those suggestions are applicable for XG.

https://hamy.io/post/0003/optimizing-openvpn-throughput/

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0 Randy Wade over 6 years ago in reply to LuCar Toni

I have a 1 gbit upload on the XG, what do you suggest trying for the MTU size?
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