<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr">Hi Tobias,<div><br></div><div>We have two types of servers. Same users are doing ok on servers with StrongSwan 5.7.2 on kernel 5.3.0-53-generic.<br></div><div><br></div><div>But on the servers with StrongSwan 5.8.2 with kernel<b> 5.4.0-39-generic, </b>the issue arises. (Not for all users, but quite a few)</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">increase the log level for knl to 2 to see which operation failed</blockquote><div><br></div><div>May you please elaborate a bit more how to change the log level for knl? In which config do I do that?</div><div><br></div><div>Many Thanks,</div><div>Houman</div><div><br></div></div></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, 6 Jul 2020 at 09:20, Tobias Brunner <<a href="mailto:tobias@strongswan.org" target="_blank">tobias@strongswan.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">Hi,<br>
<br>
> I'm seeing a strange error in StrongSwan U5.8.2/K5.4.0-39-generic<br>
> (Ubuntu 20.04).<br>
> I don't get this error with StrongSwan U5.7.2/K5.3.0-53-generic (Ubuntu<br>
> 19.10).<br>
<br>
In the same situation (i.e. if a client's IP address changes)? Or just<br>
in general? Can you replicate this error?<br>
<br>
> received netlink error: Invalid argument (22)<br>
<br>
As the error indicates, this is returned by the kernel if it doesn't<br>
like the provided data. Either when querying the existing SA or when<br>
replacing it with updated IP addresses (increase the log level for knl<br>
to 2 to see which operation failed). Also, what kernel version are you<br>
using?<br>
<br>
Regards,<br>
Tobias<br>
</blockquote></div>