[techtalk] routing and firewall probem

[James Peterson]

here is my problem.....

I have a VPN set up and working for the most part.  But I have run in to
a problem and I am pretty sure its a masquarading and firewall problem.

 here is what I have SiteA is the primary site and siteB is connection
or estabolishing a connection to SiteA.

 Windows1--->SiteA <--> Interner<-->SiteB<---Windows2

 I can ping and telnet from windows1 to SiteB though the IPTunnel
created by the software VTUN.

 Windows1-->siteA.intIP-->SiteA.extIP-->internet-->SiteB.extip->SiteB.intIP-->windows2


 and ViseVers from windows2 to Windows1. but on either side the farthest
any packet gets on the tunnel is to the intIP.

 (ex windows1 ->SiteA.intip->Sitea.tunnel->Siteb.tunnel->SiteB.intip)

 here is my route table

 SiteA
 tunnel.ip            0.0.0.0          255.255.255.255 UH  0  0  0 tun0
 int.network        0.0.0.0          255.255.255.0     U     0  0  0
eth1
 remotenetwork  Siteb.tunnelip 255.255.255.0     UG  0  0  0 tun0
ext.ip                  0.0.0.0          255.255.255.0     U     0  0  0
eth0
gateway             ISP.gateway   0.0.0.0                UG   1  0  0
eth0

 SiteB
tunnel.ip             0.0.0.0           255.255.255.255 UH  0  0  0 tun1

int.network        0.0.0.0           255.255.255.0     U     0  0  0
eth1
remotenetwork  SiteA.tunnelip 255.255.255.0      UG  0  0  0 tun1
ext.ip                 0.0.0.0           255.255.255.0      U    0  0  0
eth0
gateway           IPS.gateway    0.0.0.0                 UG  1  0  0
eth0

 I am masquareding both sides of the tunnel using IPchains.
 ipchains -A forward int.network/24 -j MASQ

 any help would be greatly appreciated

James Peterson
Roman Meal Milling Company