strongSwan on FreeBSD » History » Version 7
Tobias Brunner, 31.07.2009 17:07
some notes to NAT-T added
| 1 | 1 | Tobias Brunner | h1. strongSwan on FreeBSD |
|---|---|---|---|
| 2 | 1 | Tobias Brunner | |
| 3 | 1 | Tobias Brunner | The IKEv2 daemon charon has recently been ported to "FreeBSD":http://www.freebsd.org. There are some [[FreeBSD#Limitations|limitations]] and it is not thoroughly tested. |
| 4 | 1 | Tobias Brunner | |
| 5 | 1 | Tobias Brunner | This document describes how to install strongSwan on FreeBSD 7.2. |
| 6 | 1 | Tobias Brunner | |
| 7 | 1 | Tobias Brunner | h2. Prepare FreeBSD |
| 8 | 1 | Tobias Brunner | |
| 9 | 1 | Tobias Brunner | The generic FreeBSD kernel does not come with IPsec support. So you will have to compile your own kernel. |
| 10 | 1 | Tobias Brunner | Also, the kernel sources do not include NAT traversal. If you need that, you'll have to apply a patch. |
| 11 | 1 | Tobias Brunner | Then you will also need some additional packages to compile strongSwan. |
| 12 | 1 | Tobias Brunner | |
| 13 | 3 | Tobias Brunner | h3. Build the Kernel |
| 14 | 1 | Tobias Brunner | |
| 15 | 4 | Tobias Brunner | Basic information on how to build a custom kernel can be found in the "FreeBSD Handbook":http://www.freebsd.org/doc/handbook/kernelconfig-building.html. |
| 16 | 1 | Tobias Brunner | |
| 17 | 3 | Tobias Brunner | You'll need to add the following options to your kernel configuration file: |
| 18 | 1 | Tobias Brunner | |
| 19 | 1 | Tobias Brunner | <pre> |
| 20 | 1 | Tobias Brunner | options IPSEC |
| 21 | 1 | Tobias Brunner | device crypto |
| 22 | 1 | Tobias Brunner | </pre> |
| 23 | 1 | Tobias Brunner | |
| 24 | 2 | Tobias Brunner | You can verify that your kernel has IPsec support using the following command. Which should print a list of ipsec specific kernel state. |
| 25 | 2 | Tobias Brunner | |
| 26 | 2 | Tobias Brunner | <pre> |
| 27 | 2 | Tobias Brunner | /sbin/sysctl -a | grep ipsec |
| 28 | 1 | Tobias Brunner | </pre> |
| 29 | 1 | Tobias Brunner | |
| 30 | 3 | Tobias Brunner | If you need NAT Traversal, apply one of the "patches":http://vanhu.free.fr/FreeBSD/ provided by Yvan Vanhullebus. Then add the following option to your kernel config. |
| 31 | 3 | Tobias Brunner | |
| 32 | 3 | Tobias Brunner | <pre> |
| 33 | 3 | Tobias Brunner | options IPSEC_NAT_T |
| 34 | 3 | Tobias Brunner | </pre> |
| 35 | 1 | Tobias Brunner | |
| 36 | 7 | Tobias Brunner | Notes: |
| 37 | 7 | Tobias Brunner | |
| 38 | 7 | Tobias Brunner | * After applying the patch check that the values of the two constants @INP_ESPINUDP@ and @INP_ESPINUDP_NON_IKE@, which are defined in @/usr/src/sys/netinet/in_pcb.h@, do not overlap with the other @INP_@ constants. Values that worked for me were 0x10000000 for INP_ESPINUDP and 0x20000000 for INP_ESPINUDP_NON_IKE (i.e. just add four zeros to both values). |
| 39 | 7 | Tobias Brunner | |
| 40 | 7 | Tobias Brunner | * FreeBSD 8.0 "will include":http://svn.freebsd.org/viewvc/base?view=revision&revision=194062 the NAT-T patch, the kernel option to enable it is the same. |
| 41 | 7 | Tobias Brunner | |
| 42 | 1 | Tobias Brunner | h3. Install Packages |
| 43 | 1 | Tobias Brunner | |
| 44 | 1 | Tobias Brunner | Our test-system was installed using the Developer and Kern-Developer distributions in sysinstall. So there are maybe additional packages required on your system. |
| 45 | 1 | Tobias Brunner | |
| 46 | 1 | Tobias Brunner | The packages required to build strongSwan are as follows: |
| 47 | 1 | Tobias Brunner | |
| 48 | 5 | Tobias Brunner | * vstr |
| 49 | 5 | Tobias Brunner | * libgmp |
| 50 | 1 | Tobias Brunner | |
| 51 | 1 | Tobias Brunner | Notes: |
| 52 | 5 | Tobias Brunner | * Although FreeBSD supports the GNU specific register_printf_function function, the implementation in the C library contains a "bug":http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/133776 that prevents this from working in a multi-threaded application. Therefore the *vstr* string library is required. |
| 53 | 1 | Tobias Brunner | |
| 54 | 1 | Tobias Brunner | h2. Building strongSwan |
| 55 | 1 | Tobias Brunner | |
| 56 | 1 | Tobias Brunner | Get the latest tarball and configure strongSwan as follows: |
| 57 | 1 | Tobias Brunner | |
| 58 | 1 | Tobias Brunner | <pre> |
| 59 | 6 | Tobias Brunner | ./configure --enable-kernel-pfkey --enable-kernel-pfroute --disable-kernel-netlink --enable-vstr \ |
| 60 | 6 | Tobias Brunner | --disable-tools --disable-scripts --disable-pluto --with-group=wheel --with-lib-prefix=/usr/local |
| 61 | 1 | Tobias Brunner | </pre> |
| 62 | 1 | Tobias Brunner | |
| 63 | 1 | Tobias Brunner | |
| 64 | 1 | Tobias Brunner | h2. Limitations |
| 65 | 1 | Tobias Brunner | |
| 66 | 1 | Tobias Brunner | * Due to the lack of policy based routes, virtual IPs can not be used (client-side). |
| 67 | 2 | Tobias Brunner | * The kernel-pfroute interface lacks some final tweaks to fully support MOBIKE. |