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[Openvpn-users] Routing forever


  • Subject: [Openvpn-users] Routing forever
  • From: Jochen Witte <jwitte@xxxxxxxxxxxxx>
  • Date: Thu, 20 Jan 2005 13:28:32 +0100

Hello,

I am a newbie and have problems with routing:

I have a rather simple setup:
- 2 static, public ip servers (<pip1>, <pip2>)
- 2 private subnets (10.128.0.0/24, 192.168.0.0/24)
- OpenVPN network: 10.129.0.1<->10.129.0.2

Here is the picture:

Subnet A                 GW1            GW2           SubnetB
10.128.0.0/24<--->10.128.0.1        192.168.0.254<--->192.168.0.0/24
                       |                 |
                  10.129.0.1        10.129.0.2
                   (<pip1>)<-------->(<pip2>)
                              VPN


So far my plan. OpenVPN works fine in these cases:

1. GW1 <-> GW2
2. GW1 <-> SubnetB
3. SubnetA <-> GW2

It works NOT in this case:

1. SubnetA <-> SubnetB


Obviously this is a routing problem (no firewalling, since all packets are
logged for debuggung).

GW1 routes:
10.129.0.2  0.0.0.0         255.255.255.255 UH    0      0        0 tun0
<pipnet1>   0.0.0.0         255.255.255.248 U     0      0        0 eth1
10.128.0.0  0.0.0.0         255.255.255.0   U     0      0        0 eth0
192.168.0.0 10.129.0.2      255.255.255.0   UG    0      0        0 tun0
169.254.0.0 0.0.0.0         255.255.0.0     U     0      0        0 eth1
0.0.0.0     <default-gw>    0.0.0.0         UG    0      0        0 eth1

GW2 routes:
<default-gw>    0.0.0.0    255.255.255.255 UH    0      0        0 ppp0
10.129.0.1      0.0.0.0    255.255.255.255 UH    0      0        0 tun0
10.128.0.0      10.129.0.1 255.255.255.0   UG    0      0        0 tun0
192.168.0.0     0.0.0.0    255.255.0.0     U     0      0        0 eth0
0.0.0.0         <default-gw>  0.0.0.0      UG    0      0        0 ppp0


What have I missed. Seems to be a rather simple case...

Regards
Jochen




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