For anyone still needing the Shrew Soft VPN client for legacy IPsec connections (IKEv1, Cisco compatible) on Windows 11, here is the current status:
Use the built-in Windows 11 VPN (IKEv2/L2TP) or migrate to a modern IPsec client. shrew soft vpn client windows 11
Since Shrew Soft is an older, legacy client (last updated ~2013), I have included a that most users will need. Option 1: Tech Forum / Reddit Post (Detailed & Helpful) Title: PSA: Shrew Soft VPN Client on Windows 11 (Legacy workaround) For anyone still needing the Shrew Soft VPN