We have recently had an internet speed upgrade which gives us 1Gbps Down & Up to the internet.
When running a speedtest connected directly to our network in the office we are getting around 950mbps.
When the client runs a speedtest while disconnected from their VPN they get around 650mbps
When the client runs a speedtest while connected to the UTM SSL VPN they get around 30-40mbps
Now I understand due to limitations of OpenVPN and Network overheads we wont see the full 650mbps that the client network is capable of but to get less than 10% of that possible speed seems way too low. Am I expecting too much or is there an issue? It just seems odd that if you signup to one of these big VPN providers like Nord, Express VPn etc you can get speeds similar to that of your actual WAN but the Sophos SSL VPN is less than 10%?
These are our settings;
Protocol: TCP (Have tried UDP and doesnt improve Speed)
Encryption Algorithm: AES-256-CBC
Authentication Algorithm: SHA2 256
Key Size: 2048
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