The license is up in a few months anyway, so the question is pretty much answered for me. I'm not going to waste any more time on this. ... View more

So the blame appears to lie with the MX64. I installed a UDM-Pro with the same L2TP/IPsec VPN setup for testing, and I can transfer multi-gigabyte files without a hitch. The obvious question coming from the client is why don't we just leave the thing in place? I'm finding it difficult to disagree at this point, because they sure aren't going to shell out thousands for AnyConnect when a $400 solution is sitting right in front of them. ... View more

Sanitized and unrelated lines removed: https://pastebin.com/n5pm8mW0  ... View more

I've done a packet capture, and the traffic just stops without any kind of warning, with Windows silently closing the connection several seconds later. ... View more

I have been dealing with this exact issue since around the end of March without finding a resolution. It just suddenly started happening. The firmware had not changed, so the only thing I can come up with is the possiblity of a Windows patch released around that time causing it. I've tried all the settings/changes mentioned here. I'm replying here both to share that you're not alone and to receive updates.   I have been able to confirm that using AnyConnect does indeed resolve the issue, but I would far prefer to keep using the built-in client due to the expense. The ones writing the check are asking the very legitimate question of why should we shell out another 3 grand to do something we've been doing for free all this time. ... View more