L2TP/ipsec VPN connections drop on upload speed tests
L2TP/ipsec VPN connections drop on upload speed tests
My ER605v2 seems to drop LT2P/ipsec VPN connection every time a VPN client do a speed test (both Ookla and fast.com). The drop happens during the upload part of the speed test. I've tested from both a MacBook and an iPhone while be connected to my VPN server (ER605). I tried uploading four heavy files to Google Drive using a VPN connection, and that was not an issue. The issues seems to be related to speed testing only.
What could cause this? Some kind of FW protection that thinks the speed check is some kind of attack? I can't find anything useful regarding the disconnect in the log. The log just says the client disconnected. Could my ISP be causing this?
Its not a big issue, but I want to get to the bottom of why this is happening.
Best,
Markus
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I wonder why it only happens while using LTE/5G? I did a test right now using my macbook tethered to my iPhone (5G), and had the same issue.
Will try through wifi tomorrow.
markus
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it probably comes from the fact that the mobile operator uses cgnat and has blocked the necessary ports for L2TP. I have had problems with this many times so I no longer use L2TP, Wireguard or OpenVPN do not have this problem. contact your telephone operator and ask if they have a public ip APN that you can use.
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Tested from a public wifi** now; same issue. I lose connection during the upload part of the speedtest.
Is WireGuard a better VPN-alternative on the ER605v2? Is it as easy to set up as the standard VPN?
** I don't know how the public wifi is connected to the internet.
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Hi @MR.S
Thanks for posting in our business forum.
MR.S wrote
it probably comes from the fact that the mobile operator uses cgnat and has blocked the necessary ports for L2TP. I have had problems with this many times so I no longer use L2TP, Wireguard or OpenVPN do not have this problem. contact your telephone operator and ask if they have a public ip APN that you can use.
Agree. I don't think any cell vendors would provide a public v4 address now. It is so desperate to have public v4 addresses. I gotta pay for a public v4 address every month. And it is not static. It would cost more to get a public static v4.
I got 4 SIM cards from 3 different vendors and none of them gives a public IP. They are all CGNAT.
I would believe this is a problem with the specific device and it is the device issue instead of the VPN.
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