Troy

Troy Aden wrote:

Hello all, This may seem a silly question but I have not been able to find
any info in any how-to or docs and I am hoping someone here can help me out.


http://www.freeswan.org/freeswan_trees/freeswan-1.98b/doc/manpage.d/ipsec.conf.5.html


The question is : How do I setup the IPSEC config so that I route only
specific subnets over the IPSEC tunnel. Currently, I have set it up by
simply using a large subnet mask that encompasses all the networks on either
side of the link. (see my exmaple below) The problem is that I need to be
more granular now and only route specific subnets over the link. I have
played with it for awhile now and I can't seem to have more than one subnet
declaration in my default conn statement. For example lets say I want only
192.168.130.0/24 and 192.168.134.0/24 to get routed over the IPSEC on router
A and I only want 172.31.0.0/16 and 172.161.0.0/16 on router B. These are
the only subnets I would like to be able to communicate over the IPSEC
link... Is there a clean way to do this? Please have a look at my configs
below and let me know how I should do this.


Define a single connection for each subnet. You can use the also= statement to include common parameters.

e.g.

conn xx
also=common_conn_params
rightsubnet=10.0.0.32/27
auto=add


conn comon_conn_params
   left=xx.yy.zz.nn
   leftsubnet=aa.bb.cc.dd/nn
......

cheers
Erich



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