Reconnection problem on roam

Colin Jia Zheng colinz at seas.harvard.edu
Sat Dec 5 20:49:44 EST 2009


> That's odd. What's your routing table at this point? Do you have a
> sensible route to the server -- you're not trying to route packets to it
> _through_ the VPN or anything daft?

Routing table before running vpn:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
140.247.5.0     *               255.255.255.0   U     304    0        0 wlan0
default         core-np-gw-vl26 0.0.0.0         UG    304    0        0 wlan0


Routing table after running vpn:
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
core-vpn-2-gw.f core-np-gw-vl26 255.255.255.255 UGH    1500 0          0 wlan0
140.247.5.0     *               255.255.255.0   U         0 0          0 wlan0
default         *               0.0.0.0         U         0 0          0 tun0
default         core-np-gw-vl26 0.0.0.0         UG        0 0          0 wlan0


After I restart network, and while openconnect attempts to reconnect,
“netstat -r” gets stuck after printing these lines

Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
140.247.5.0     *               255.255.255.0   U         0 0          0 wlan0
default         *               0.0.0.0         U         0 0          0 tun0



> 
> Use tcpdump on the outgoing interface. Does it show an attempt to
> connect?

After restarting network, tcpdump -i wlan0 says

1 packets captured
2480 packets received by filter
0 packets dropped by kernel





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