Multiple server route table update

cg28oh

I have the OpenVPN GUI on Windows 8 Pro 64bit with 2 separate server connections w/ different routes. When I connect to server A, the route table is updated with routes for server B to send to server A connection. Server A is a bridge of the LAN and Server B is routed. I can flush the table in Windows 8, reboot and the first connection is updated is it's routes only. I travel home to connect to Server A, and it's fine. But the next day when I connect to Server B (without flushing), that's when the routes are not correctly updated. The server is Ubuntu 12.04. How can I get the router correct all the time without flushing the tables?

here is the route table of cleint:

===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0    192.168.32.58   192.168.32.139     20
         10.0.0.0        255.0.0.0     192.168.32.2         10.8.0.6     30 WRONG! interface should be 192.168.32.139! 
         10.8.0.1  255.255.255.255         10.8.0.5         10.8.0.6     30
         10.8.0.4  255.255.255.252         On-link          10.8.0.6    286
         10.8.0.6  255.255.255.255         On-link          10.8.0.6    286
         10.8.0.7  255.255.255.255         On-link          10.8.0.6    286
        127.0.0.0        255.0.0.0         On-link         127.0.0.1    306
        127.0.0.1  255.255.255.255         On-link         127.0.0.1    306
  127.255.255.255  255.255.255.255         On-link         127.0.0.1    306
      172.20.80.0    255.255.255.0     192.168.32.2         10.8.0.6     30
      192.168.0.0  255.255.255.252     192.168.32.2         10.8.0.6     30
      192.168.1.0    255.255.255.0         10.8.0.5         10.8.0.6     30 RIGHT!
     192.168.32.0    255.255.255.0         On-link    192.168.32.139    276
     192.168.32.0    255.255.255.0     192.168.32.2         10.8.0.6     30
   192.168.32.139  255.255.255.255         On-link    192.168.32.139    276
   192.168.32.255  255.255.255.255         On-link    192.168.32.139    276
    192.168.200.0    255.255.255.0         10.8.0.5         10.8.0.6     30 RIGHT!
        224.0.0.0        240.0.0.0         On-link         127.0.0.1    306
        224.0.0.0        240.0.0.0         On-link          10.8.0.6    286
        224.0.0.0        240.0.0.0         On-link    192.168.32.139    276
  255.255.255.255  255.255.255.255         On-link         127.0.0.1    306
  255.255.255.255  255.255.255.255         On-link          10.8.0.6    286
  255.255.255.255  255.255.255.255         On-link    192.168.32.139    276
===========================================================================

maikcat

hi there,

the 10.0.0.0/8 route is pushed by vpn server?

you can always add a persistent static route... 🙂

Michael.

JoshC

If your server is pushing a 10/8 route, please fix it. This is an obscene route to be pushing across a VPN, and means either the admin of the server is clueless, or somehow honestly expects that there will be no local conflict with one of these most well-used RFC1918 blocks. Either one is concerning if you are not familiar with the issues.

Evidently whatever thing you're peering with at 10.8.0.6 (probably an OpenVPN IP by the looks of the "default, presumably unmodified OpenVPN addressing") is pushing a 10/8 route. I suggest you either don't configure it like this if you're the admin, or go knock some sense into the admin using that large of a netmask.