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2.31. openswan
Openswan is a free implementation of IPsec (Internet Protocol Security) and IKE (Internet Key Exchange) for Linux. The openswan package contains the daemons and user space tools for setting up Openswan. It supports the NETKEY/XFRM IPsec kernel stack that exists in the default Linux kernel. Openswan 2.6 and later also supports IKEv2 (Internet Key Exchange Protocol Version 2), which is defined in RFC5996
- Openswan generates a Diffie-Hellman (DH) shared key that is 1 byte short because nss does not add leading zero bytes when needed. Also, openswan in Red Hat Enterprise Linux 5.9 does not support setting of the sha2_truncbug parameter in Red Hat Enterprise Linux 5.9, because the kernel does not support it.
