Gentoo kernel ships 2.04 version of freeswan kernel module KLIPS Gentoo userland ships superfreeswan 1.99. Not only does *freeswan not interoperate between 1.x and 2.x superfreeswan and freeswan also don't interoperate. Reproducible: Always Steps to Reproduce: 1. ipsec --version will show the problem: Linux FreeS/WAN Usuper-freeswan-1.99_kb4/K2.03 Expected Results: fix: either ship superfreeswan-1.99.8 or ship freeswan-2.04, or have both als choice, but don't mix and match.
freeswan & superfreeswan are out of the tree. All users are migrated to openswan/strongswan. The patches in gentoo-sources-2.4.26-r4 are now matched with openswan-2.1.4. Closing.