[olug] OT: windows 2000, ethernet aliases, webvpn

Will Langford unfies at gmail.com
Sat Jul 26 22:34:57 UTC 2008


This is *way* out of bounds / off topic.  But, as stated by others before in
the list, there are smart ppl here, so I figured I'd give ya'll a shot.

Overall setup: Internet -> in building network (10.*) -> server.  This
server also has a second NIC in it that has a highly broken up 192.168.*
network attached, of which a client is attached.

With current configuration, server and client can talk peacefully and all
kinds of love in the dark happens.

Our server now needs to talk to a third party system for testing.  The
connection stuff for this third party is via Cisco's WEBVPN stuff.  I log
into their webvpn with creditials supplied, it does it's little java /
active x thing... and the VPN comes up (a 10.* collission but not too
relavent).  It also creates a software ethernet device in doing so.

Server can then talk to the remote system just fine.  Problem is -- while
this webvpn thing is active, the server and client can't talk along their
192.168.* addresses.  Server ping claims 'destination host unreachable', and
client just times out.  If I close the webvpn thing, client/server can talk
happily again.

I try to avoid Windows networking as much as I can, but this is ... annoying
me and I'd love to know WTF :).

Windows routing table before the VPN is:

Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
         0.0.0.0          0.0.0.0         10.1.0.1       10.1.0.76       1
         0.0.0.0          0.0.0.0       172.16.1.1       10.1.0.76       1
        10.1.0.0      255.255.0.0        10.1.0.76       10.1.0.76       1
       10.1.0.76  255.255.255.255        127.0.0.1       127.0.0.1       1
  10.255.255.255  255.255.255.255        10.1.0.76       10.1.0.76       1
       127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1       1
      172.16.1.0    255.255.255.0     172.16.1.100       10.1.0.76       1
  172.16.255.255  255.255.255.255     172.16.1.100       10.1.0.76       1
     192.168.2.0  255.255.255.252      192.168.2.1   192.168.254.1       1
     192.168.2.1  255.255.255.255        127.0.0.1       127.0.0.1       1
   192.168.2.255  255.255.255.255    192.168.254.1   192.168.254.1       1
   192.168.240.0  255.255.255.252    192.168.240.1   192.168.254.1       1
   192.168.240.1  255.255.255.255        127.0.0.1       127.0.0.1       1
 192.168.240.255  255.255.255.255    192.168.254.1   192.168.254.1       1
   192.168.241.0  255.255.255.252    192.168.241.1   192.168.254.1       1
   192.168.241.1  255.255.255.255        127.0.0.1       127.0.0.1       1
 192.168.241.255  255.255.255.255    192.168.254.1   192.168.254.1       1
   192.168.242.0  255.255.255.252    192.168.242.1   192.168.254.1       1
   192.168.242.1  255.255.255.255        127.0.0.1       127.0.0.1       1
 192.168.242.255  255.255.255.255    192.168.254.1   192.168.254.1       1
   192.168.254.1  255.255.255.255        127.0.0.1       127.0.0.1       1
 192.168.254.255  255.255.255.255    192.168.254.1   192.168.254.1       1
       224.0.0.0        224.0.0.0        10.1.0.76       10.1.0.76       1
       224.0.0.0        224.0.0.0    192.168.254.1   192.168.254.1       1
 255.255.255.255  255.255.255.255    192.168.254.1   192.168.254.1       1
Default Gateway:          10.1.0.1
===========================================================================
Persistent Routes:
 None

10.1.0.76 == in house network (10.1.0.1 gw)
192.168.*.* == isolated network
192.168.254.1 == primary interface ip of isolated network
192.168.2.1 / 192.168.2.2 = server / client ip on isolated network


Now, after the VPN comes up, it kind of spews a bunch of ugly stuff all over
the routing table, and we get:

Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
         0.0.0.0          0.0.0.0         10.1.0.1       10.1.0.76       1
        10.0.0.0    255.255.254.0       10.1.1.244      10.1.1.244       1
        10.0.3.0    255.255.255.0       10.1.1.244      10.1.1.244       1
        10.0.4.0    255.255.252.0       10.1.1.244      10.1.1.244       1
        10.1.0.0      255.255.0.0        10.1.0.76       10.1.0.76       1
        10.1.0.1  255.255.255.255        10.1.0.76       10.1.0.76       1
       10.1.0.76  255.255.255.255        127.0.0.1       127.0.0.1       1
        10.1.1.0    255.255.255.0       10.1.1.244      10.1.1.244       1
      10.1.1.244  255.255.255.255        127.0.0.1       127.0.0.1       1
  10.255.255.255  255.255.255.255        10.1.0.76       10.1.0.76       1
  10.255.255.255  255.255.255.255       10.1.1.244      10.1.1.244       1
   63.144.61.164  255.255.255.255         10.1.0.1       10.1.0.76       1
       127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1       1
     192.168.2.0  255.255.255.252      192.168.2.1   192.168.254.1       1
     192.168.2.1  255.255.255.255        127.0.0.1       127.0.0.1       1
   192.168.2.255  255.255.255.255    192.168.254.1   192.168.254.1       1
   192.168.240.0  255.255.255.252    192.168.240.1   192.168.254.1       1
   192.168.240.1  255.255.255.255        127.0.0.1       127.0.0.1       1
 192.168.240.255  255.255.255.255    192.168.254.1   192.168.254.1       1
   192.168.241.0  255.255.255.252    192.168.241.1   192.168.254.1       1
   192.168.241.1  255.255.255.255        127.0.0.1       127.0.0.1       1
 192.168.241.255  255.255.255.255    192.168.254.1   192.168.254.1       1
   192.168.242.0  255.255.255.252    192.168.242.1   192.168.254.1       1
   192.168.242.1  255.255.255.255        127.0.0.1       127.0.0.1       1
 192.168.242.255  255.255.255.255    192.168.254.1   192.168.254.1       1
   192.168.254.1  255.255.255.255        127.0.0.1       127.0.0.1       1
 192.168.254.255  255.255.255.255    192.168.254.1   192.168.254.1       1
       224.0.0.0        224.0.0.0        10.1.0.76       10.1.0.76       1
       224.0.0.0        224.0.0.0       10.1.1.244      10.1.1.244       1
       224.0.0.0        224.0.0.0    192.168.254.1   192.168.254.1       1
 255.255.255.255  255.255.255.255    192.168.254.1   192.168.254.1       1
Default Gateway:          10.1.0.1
===========================================================================
Persistent Routes:
 None


Now... despite all the extra 10.* entries.... why on earth is this killing
192.168.* ?

-Will



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