[Openswan Users] Help for making VPN Tunnel using DynDNS on DSL Routers

Deepak Chopra deepak.chopra at mind-infotech.com
Tue Jan 16 05:02:54 EST 2007

Dear ALL,

I've a problem in setting up a VPN connections between my Home Network to my
Where 3 machines are connected to my home network and the same number of
machines are installed in my office.
I want to make a VPN connection on both gateways with FreeSWan using Dynamic
IP Addresses.

                |        |           |    |   |        |      [          ]
|    |       |     |    |    |
---|------->----|----Gateway Linux---|===>|-DSL Router-|------[ INTERNET
]---|-DSL ROUTER-|-----|--Linux--|--<---|----   
   |            |        |           |    |   |        |      [          ]
|    |       |          |           | (eth1)          |
|                  |
HomeNetwork                              abc.dnsalias.net
xyz.dnsalias.net       |      OfficeNet
| (eth1)

In the above mentioned Scenario, I've two DSL Routers with same
configuration. Both are taking Dynamic IP address from the ISP and on both
the DSL Routers I've configured the DynDNS.org user accounts (
abc.dnsalias.net and xyz.dnsalias.net) and these DSL routers are directly
connected to the Linux (RedHat9) GateWay Machines on eth0 interface. Now I
want to make a VPN Tunnel between my HomeNet and OfficeNet. 

Kindly suggest me how it is possible. And I'm also sending you the
ipsec.conf and ipsec.secrets along with this.

I'd be highly thankful to you if I'm able to connect my home network machine
to my office network. 

Deepak Chopra

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