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I've successfully routed arbitrary traffic over this VPN in MS Windows via the Cisco AnyConnect client with default configuration.

I've successfully routed arbitrary traffic over this VPN in MS Windows via the Cisco AnyConnect client with default configuration. Here is what the routing table looks like when the AnyConnect client is working (this is a different computer behind the same router at 192.168.1.254).

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0    192.168.1.254     192.168.1.13     30
         10.0.0.0        255.0.0.0    192.168.128.1  192.168.128.197      2
      91.230.41.0    255.255.255.0    192.168.128.1  192.168.128.197      2
        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
      128.122.0.0      255.255.0.0    192.168.128.1  192.168.128.197      2
   128.122.252.68  255.255.255.255    192.168.1.254     192.168.1.13     31
       172.16.0.0      255.240.0.0    192.168.128.1  192.168.128.197      2
      192.168.0.0      255.255.0.0    192.168.128.1  192.168.128.197      2
      192.168.1.0    255.255.255.0         On-link      192.168.1.13    286
     192.168.1.13  255.255.255.255         On-link      192.168.1.13    286
    192.168.1.254  255.255.255.255         On-link      192.168.1.13     31
    192.168.1.255  255.255.255.255         On-link      192.168.1.13    286
     192.168.31.0    255.255.255.0         On-link      192.168.31.1    276
     192.168.31.1  255.255.255.255         On-link      192.168.31.1    276
   192.168.31.255  255.255.255.255         On-link      192.168.31.1    276
    192.168.128.0    255.255.255.0         On-link   192.168.128.197    257
  192.168.128.197  255.255.255.255         On-link   192.168.128.197    257
  192.168.128.255  255.255.255.255         On-link   192.168.128.197    257
    192.168.203.0    255.255.255.0         On-link     192.168.203.1    276
    192.168.203.1  255.255.255.255         On-link     192.168.203.1    276
  192.168.203.255  255.255.255.255         On-link     192.168.203.1    276
     193.175.54.0    255.255.255.0    192.168.128.1  192.168.128.197      2
    193.205.158.0  255.255.255.128    192.168.128.1  192.168.128.197      2
    193.206.104.0    255.255.255.0    192.168.128.1  192.168.128.197      2
     195.113.94.0    255.255.255.0    192.168.128.1  192.168.128.197      2
    203.126.200.0    255.255.255.0    192.168.128.1  192.168.128.197      2
  203.174.165.128  255.255.255.128    192.168.128.1  192.168.128.197      2
     212.219.93.0    255.255.255.0    192.168.128.1  192.168.128.197      2
      216.165.0.0    255.255.128.0    192.168.128.1  192.168.128.197      2
        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      192.168.1.13    286
        224.0.0.0        240.0.0.0         On-link     192.168.203.1    276
        224.0.0.0        240.0.0.0         On-link      192.168.31.1    276
        224.0.0.0        240.0.0.0         On-link   192.168.128.197  10000
  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      192.168.1.13    286
  255.255.255.255  255.255.255.255         On-link     192.168.203.1    276
  255.255.255.255  255.255.255.255         On-link      192.168.31.1    276
  255.255.255.255  255.255.255.255         On-link   192.168.128.197  10000
===========================================================================

More information-

I've successfully routed arbitrary traffic over this VPN in MS Windows via the Cisco AnyConnect client with default configuration.

route add -net 0.0.0.0 gw homeportal dev tun0,

route add -net 0.0.0.0 tun0,

route add -net 0.0.0.0 gw 128.122.252.77 dev tun0,

route add -net 0.0.0.0 gw 128.122.252.77 dev eth0,

iptables -A FORWARD -o tun0 -j ACCEPT iptables -A FORWARD -i tun0 -j ACCEPT iptables -t nat -A POSTROUTING -o tun0 -j MASQUERADE,

default via 192.168.1.254 dev eth0 proto static 10.0.0.0/8 dev tun0 scope link 91.230.41.0/24 dev tun0 scope link 128.122.0.0/16 dev tun0 scope link 128.122.252.68 via 192.168.1.254 dev eth0 src 192.168.1.32 128.122.253.46 dev tun0 scope link 128.122.253.79 dev tun0 scope link 172.16.0.0/12 dev tun0 scope link 192.168.0.0/16 dev tun0 scope link 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.32 metric 1 193.175.54.0/24 dev tun0 scope link 193.205.158.0/25 dev tun0 scope link 193.206.104.0/24 dev tun0 scope link 195.113.94.0/24 dev tun0 scope link 203.126.200.0/24 dev tun0 scope link 203.174.165.128/25 dev tun0 scope link 212.219.93.0/24 dev tun0 scope link 216.165.0.0/17 dev tun0 scope link

route add -net 0.0.0.0 gw homeportal dev tun0

route add -net 0.0.0.0 tun0

route add -net 0.0.0.0 gw 128.122.252.77 dev tun0

route add -net 0.0.0.0 gw 128.122.252.77 dev eth0

iptables -A FORWARD -o tun0 -j ACCEPT
iptables -A FORWARD -i tun0 -j ACCEPT
iptables -t nat -A POSTROUTING -o tun0 -j MASQUERADE

default via 192.168.1.254 dev eth0  proto static 
10.0.0.0/8 dev tun0  scope link 
91.230.41.0/24 dev tun0  scope link 
128.122.0.0/16 dev tun0  scope link 
128.122.252.68 via 192.168.1.254 dev eth0  src 192.168.1.32 
128.122.253.46 dev tun0  scope link 
128.122.253.79 dev tun0  scope link 
172.16.0.0/12 dev tun0  scope link 
192.168.0.0/16 dev tun0  scope link 
192.168.1.0/24 dev eth0  proto kernel  scope link  src 192.168.1.32  metric 1 
193.175.54.0/24 dev tun0  scope link 
193.205.158.0/25 dev tun0  scope link 
193.206.104.0/24 dev tun0  scope link 
195.113.94.0/24 dev tun0  scope link 
203.126.200.0/24 dev tun0  scope link 
203.174.165.128/25 dev tun0  scope link 
212.219.93.0/24 dev tun0  scope link 
216.165.0.0/17 dev tun0  scope link