I have a special problem that I hope the experts that roam these forums can assist with. I truly hope people will assist, since this is a matter of loosing 12 months of subscription to a VPN service. I'll try to give as detailed information as possible.
Router: Linksys WRT54GL
Router modification: Clock speeds set to 250mhz
Firmware: Tomato Firmware v1.28.7634 Toastman-IPT-ND ND VLAN-VPN
Internet connection: 100mbits (around 10.6 mb/s at full possible speeds)
My router seems to allow only about 5mbits of connection speed after an OpenVPN tunnel has been opened through the firmware's OpenVPN client (HMA scripts). This has been confirmed as a router issue and not a server issue since the server allows unlimited speeds and an issue-free experience with the software from HMA.
Attempts at a solution:
With assistance from an HMA technical expert, we went through the entire firmware and didn't not find the source of the problem. Every modification to firmware settings yielded no difference in speeds. Confirmed with speedtest.net.
This is not a QoS issue (both tried turned on and off).
Both UDP and TCP have been tested. Neither works better (note: the software uses TCP)
Other protocols are not a possibility. The server needed to connect with does not support any other protocol than OpenVPN.
Things confirmed as NOT causing the problem:
The server being connected to. The HMA software works without a hitch and with unlimited speeds
Internet connection. Turn the VPN tunnel off and the internet speed is about 100mbits.
I truly hope there is some master out there that might have any idea of what is causing the problem. That person will have my biggest thanks!