[Swan] xl2tpd and Microsoft, was Re: [libreswan/libreswan] Connection closed to remote ip (#306)

Paul Wouters paul at nohats.ca
Mon Feb 3 07:57:46 UTC 2020

This is an interesting and unexpected bit of information. I know in the past, xl2tpd mishandled the kernel case and forcing to userland resolved it. It’s odd to see the reverse now. Sending this message to the libreswan list for larger visibility. I will also update the FAQ with this.



Sent from my iPhone

> On Feb 3, 2020, at 05:40, Douglas Kosovic <notifications at github.com> wrote:
> Glad to hear you got it working.
> Not sure why it broke. For Microsoft L2TP compatibility, I haven't really looked into why xl2tpd works with the l2tp_ppp kernel module, but not the userspace fallback alternative. I only found out about the issue last week, reproduced the issue and worked out that the l2tp_ppp kernel module wasn't getting loaded with Fedora >= 31.
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