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<p class=MsoNormal><span lang=NL style='font-family:"Calibri","sans-serif"'>Hi,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=NL style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>I have the
following situation:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>We have
several sales offices that connect to our head office via an ipsec connection,
which is<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>established
by a Draytek router. On our server side we have a Linux server running with
openswan<o:p></o:p></span></p>
<p class=MsoNormal><span lang=NL style='font-family:"Calibri","sans-serif"'>(Linux
Openswan U2.6.20/K2.6.27.7-smp (netkey)).<o:p></o:p></span></p>
<p class=MsoNormal><span lang=NL style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>Our head
office internal network range is 192.168.2.x/24 and our sales offices are in
the range of<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>10.0.x.0/24.
So, e.g.:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>Remote
office LAN 1<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>(10.0.2.0/24)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>|<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>Draytek
router (10.0.2.1)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>|<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>Internet<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>|<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>Linux server
(ext. ip: a.b.c.d)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>(192.168.2.3)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>|<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>Head office
LAN<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>(192.168.2.0/24)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>The remote
offices are for the most part connected to internet with a dynamic ip address
(roadwarrior)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>and so I
have used an ID to keep them apart.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>My
ipsec.conf file is as followed:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>#
/etc/ipsec.conf - Openswan IPsec configuration file<o:p></o:p></span></p>
<p class=MsoNormal><span lang=NL style='font-size:8.0pt;font-family:"Courier New"'>#
RCSID $Id: ipsec.conf.in,v 1.16 2005/07/26 12:29:45 ken Exp $<o:p></o:p></span></p>
<p class=MsoNormal><span lang=NL style='font-size:8.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>#
This file: /usr/local/share/doc/openswan/ipsec.conf-sample<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>#<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>#
Manual: ipsec.conf.5<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>version
2.0 # conforms to second version of ipsec.conf
specification<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>#
basic configuration<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>config
setup<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
uniqueids=yes<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
nat_traversal=yes<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
virtual_private=%v4:10.0.0.0/16,%v4:172.16.0.0/12,%v4:192.168.0.0/16,%v<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
protostack=netkey<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
plutodebug=none<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
klipsdebug=none<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>conn
%default<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
keyingtries=0<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
disablearrivalcheck=no<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
authby=secret<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
dpddelay=60<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
dpdtimeout=120<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
dpdaction=clear<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>conn
Office1<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
auto=add<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
left=a.b.c.d
(=external ip Linux server)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
leftsourceip=192.168.2.3 (=internal LAN address Linux server)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
leftsubnet=192.168.2.0/24 (=internal subnet on head office side)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
right=%any
(=other side uses dynamic ip so have to use %any here)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
rightsourceip=10.0.2.1 (=local ip address of Draytek router
from other side)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
rightsubnet=10.0.2.0/24 (=local subnet of remote office 1)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
rightid=@RemoteOffice1 (=ID for office to identify which
tunnel to use)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
keyexchange=ike<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
keyingtries=5<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
type=tunnel<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
disablearrivalcheck=no<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
authby=secret<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
pfs=yes<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>conn
Office2<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
auto=add<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
left=a.b.c.d<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
leftsourceip=192.168.2.3<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
leftsubnet=192.168.2.0/24<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
right=%any<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
rightsourceip=10.0.3.1<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
rightsubnet=10.0.3.0/24<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
rightid=@RemoteOffice2<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
keyexchange=ike<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
keyingtries=5<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
type=tunnel<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
disablearrivalcheck=no<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
authby=secret<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Courier New"'>
pfs=yes<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>And there are
more offices configured in the file but they are much the same, except for the
subnet.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>The Draytek
routers can connect without any problem and I can ping the remote subnets from
the Linux server.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>I can also
ping the remote computers in the remote offices from the Head Office LAN.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>It is
however not possible to ping a system in Remote Office 2 from Remote Office 1:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>e.g. In
Remote Office 1: ping 10.0.3.1<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>After using
a “tcpdump –n icmp” I saw that traffic is going from the computer in Remote
Office 1 to the Linux server<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>but from
there it doesn’t travel to the Remote Office 2.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>How will I
be able to access services in Remote Office 2 from Remote Office 1 (e.g. ping
or access to a web server)?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>Dennis<o:p></o:p></span></p>
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