Hi Actually, by default Strongswan is configured with NOT sending Vendor_id....but you can make it explicit by enabling/uncommenting the setting in "../Strongswan.d/charon.conf" file as below:
# Send strongSwan vendor ID payload send_vendor_id = no hope this helps thanks & regards Rajiv On Fri, Jan 14, 2022 at 3:10 PM Marco Berizzi <pupi...@hotmail.com> wrote: > Hello everyone, > > kindly, I would like to know if there is a way to > make strongswan not send the 'vendor id'. > Unfortunately the windows 10 update kb5009543 > introduced this regression: > > "After installing this update, IP Security > (IPSEC) connections that contain a Vendor ID might > fail. VPN connections using Layer 2 Tunneling > Protocol (L2TP) or IP security Internet Key > Exchange (IPSEC IKE) might also be affected. > > > To mitigate the issue for some VPNs, you can > disable Vendor ID within the server-side > settings. > > Note Not all VPN servers have the option to > disable Vendor ID from being used. > > We are presently investigating and will provide an > update in an upcoming release." > > Thanks in advance > Marco