Shrewsoft created a VPN client and last build was done in 2013. We can still run such an ancient software in Fedora 38 with this couple of tricks.

First you need to enable the COPR repository for legacy OpenSSL 1.10

dnf copr enable dioni21/compat-openssl10

After that, you can manually install the shrewsoft package with:

yum localinstall https://download.copr.fedorainfracloud.org/results/pessoft/ike/fedora-rawhide-x86_64/00780930-ike/ike-2.2.1-13.fc29.x86_64.rpm

First you need to ensure that the IKE daemon is runing. You can launch it under your regular user:

/usr/sbin/iked &

Then launch the VPN client GUI with:

/usr/bin/ikec

Finally import your VPN profile and enjoy :-)

Happy hacking!