VPN (IPSEC)

[alexus]

Hello,

I'm trying to establish a VPN tunnel over internet, I read a
http://www.freebsd.org/doc/en/books/handbook/ipsec.html on how to set
it up, I'm some what strangeling if my setup will work at all.

i have box #1 that have 1 primary IP, which is private IP but in front
of my box, I have a device that translate a public IP address into
private IP, so "technicaly" its a public IP not a private, yet system
sees it as private, yet my box #2 has interface with real public ip
and another interface with private ip, i created GIF0 interface, yet i
can't ping private range on other box.


box#1

fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=8<VLAN_MTU>
        ether 00:0f:fe:aa:f4:61
        inet 192.168.1.251 netmask 0xffffff00 broadcast 192.168.1.255
        inet 172.16.172.16 netmask 0xffffffff broadcast 172.16.172.16
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
plip0: flags=108810<POINTOPOINT,SIMPLEX,MULTICAST,NEEDSGIANT> metric 0 mtu 1500
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
        inet6 ::1 prefixlen 128
        inet 127.0.0.1 netmask 0xff000000
gif0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1280
        tunnel inet 38.96.123.42 --> 74.2.252.194
        inet 192.168.1.251 --> 192.168.2.252 netmask 0xffffffff
alexus at jot ~ 503$ netstat -rn | grep gif0
192.168.2.252      192.168.1.251      UH          0       15   gif0
alexus at jot ~ 504$

box#2

su-3.2# ifconfig
dc0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric
0 mtu 1500
        options=8<VLAN_MTU>
        ether 00:1a:70:10:e3:89
        inet 74.2.252.194 netmask 0xfffffff8 broadcast 74.2.252.199
        media: Ethernet autoselect (100baseTX)
        status: active
fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=8<VLAN_MTU>
        ether 00:13:20:09:53:31
        inet 192.168.2.252 netmask 0xffffff00 broadcast 192.168.2.255
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        inet 127.0.0.1 netmask 0xff000000
gif0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1280
        tunnel inet 74.2.252.194 --> 38.96.132.42
        inet 192.168.2.252 --> 192.168.1.251 netmask 0xffffffff
su-3.2# netstat -rn | grep gif0
192.168.1.251      192.168.2.252      UH          0      602   gif0
su-3.2#


any suggestions are welcome, thanks!
-- 
http://alexus.org/