Until Ubuntu 20.04, this package worked fine, but on Ubuntu 24.04 it no longer works except via CLI tools like StrongSwan. Is there any package that can do what ShrewVPN used to do?
Not really a direct GUI replacement for ShrewVPN on Ubuntu 24.04. Your best bet is NetworkManager with strongswan plugin it’s not exactly like Shrew, but you get a GUI front-end for IPsec connections. Otherwise, it’s mostly CLI these days.