CentOS - May 2005 - VPN

Hi list, I am trying to create a VPN between two different locations. On 
the first location we have a cisco pix 525 Natting the internal 
192.168.100.x network, while on the second location we have a Centos3 
box Natting via iptables the internal 192.168.10.x netowrk. My goal is 
to connect this 2 over the internet via IPsec. I created the IPsec 
Net2Net via the network configuration graphic tool, and I configured the 
cisco following the howto 
http://www.johnleach.co.uk/documents/freeswan-pix/freeswan-pix.html . 
 From my understanding, I should have an ipsec0 network device showing 
up, so that I could route all traffic from 192.168.10.x directed to 
192.168.100.x through it. The thing is that when I try to ifup ipsec0 I 
get the following errors:

modprobe: modprobe: Can't locate module ripemd160
modprobe: modprobe: Can't locate module cast128
modprobe: modprobe: Can't locate module lzs
modprobe: modprobe: Can't locate module lzjh

So, after googling and reading a lot with no success, I would like to 
ask for advice on this, and successfull story :). I really need to have 
this VPN running, and  I am not tied to this one solution only, 
linux-to-linux VPN, openVPN or anything else you could suggest would be 
great.

Thanks in advice

Simone

Freeswan is quite easy to use and setup, I have done hundreds over the 
last few years,

Including cisco <-> freeswan and Nortel <-> freeswan

what do you have in your ipsec.conf file ?

P.


Simone wrote:
> Hi list, I am trying to create a VPN between two different locations. 
> On the first location we have a cisco pix 525 Natting the internal 
> 192.168.100.x network, while on the second location we have a Centos3 
> box Natting via iptables the internal 192.168.10.x netowrk. My goal is 
> to connect this 2 over the internet via IPsec. I created the IPsec 
> Net2Net via the network configuration graphic tool, and I configured 
> the cisco following the howto 
> http://www.johnleach.co.uk/documents/freeswan-pix/freeswan-pix.html . 
> From my understanding, I should have an ipsec0 network device showing 
> up, so that I could route all traffic from 192.168.10.x directed to 
> 192.168.100.x through it. The thing is that when I try to ifup ipsec0 
> I get the following errors:
>
> modprobe: modprobe: Can't locate module ripemd160
> modprobe: modprobe: Can't locate module cast128
> modprobe: modprobe: Can't locate module lzs
> modprobe: modprobe: Can't locate module lzjh
>
> So, after googling and reading a lot with no success, I would like to 
> ask for advice on this, and successfull story :). I really need to 
> have this VPN running, and  I am not tied to this one solution only, 
> linux-to-linux VPN, openVPN or anything else you could suggest would 
> be great.
>
> Thanks in advice
>
> Simone
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos

Hi Simone,

Are you using CentOS 4?

If you are, the 2.6 kernel comes with openswan, freeswan is dead.

CentOS 4 comes with ipsec-tools to configure ipsec tunnels.

http://www.openswan.org/