@Cloud21 did you try to disable th PFS flag in NethServer?
Said that …the fact is that we need to know the IKE and ESP parameters of the Vodafone Station in order to recreate same settings in NethServer, but it seems quite difficult to find this parameters.
I also found a document that shows how to make an ipsec vpn between a Vodafone Station and a TP link device (in italian) :
If anybody knows the default IKE and ESP values on TP Link this could help.