Recientemente instalé el adaptador de red Intel Gigabit CT en mi máquina con Windows 7 de 64 bits. Anteriormente, estaba usando una conexión inalámbrica y el cliente Cisco AnyConnect VPN versión 3.1.0165. Cuando intento conectarme a una VPN en el trabajo, primero me conecto correctamente, pero luego me desconecto y no logro volver a conectarme. Este es un problema conocido con nuestro servidor Cisco. Siempre se desconecta y luego se vuelve a conectar en los primeros minutos. Si estoy conectado a mi enrutador en casa mediante una conexión inalámbrica, todo funciona bien. Se desconecta y luego se vuelve a conectar automáticamente y permanece conectado. Pero si me conecto usando un nuevo adaptador Intel, no se vuelve a conectar. Rastreé este problema hasta el hecho de que cuando el cliente Cisco se desconecta, elimina mi ruta de puerta de enlace predeterminada. No puedo entender por qué hace esto solo si estoy conectado a través del adaptador Ethernet y no de forma inalámbrica. Ya intenté desinstalar y reinstalar los controladores de la tarjeta de red. Lo único que ayuda después es deshabilitar y luego habilitar el adaptador posterior, pero no ayuda a volver a conectarse a la VPN. Aquí está la configuración y las rutas antes de conectarse a la VPN:
Ethernet adapter Local Area Connection 2:
Connection-specific DNS Suffix . : hsd1.ct.comcast.net
Description . . . . . . . . . . . : Intel(R) Gigabit CT Desktop Adapter
Physical Address. . . . . . . . . : 68-05-CA-24-F6-F9
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::a9c5:1e77:aa50:1ade%55(Preferred)
IPv4 Address. . . . . . . . . . . : 10.0.0.49(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Saturday, July 19, 2014 11:11:25 PM
Lease Expires . . . . . . . . . . : Saturday, July 26, 2014 11:11:25 PM
Default Gateway . . . . . . . . . : 10.0.0.1
DHCP Server . . . . . . . . . . . : 10.0.0.1
DHCPv6 IAID . . . . . . . . . . . : 929564106
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-15-C5-00-D6-18-03-73-AE-4A-21
DNS Servers . . . . . . . . . . . : 75.75.75.75
75.75.76.76
NetBIOS over Tcpip. . . . . . . . : Enabled
rutas:
===========================================================================
Interface List
55...68 05 ca 24 f6 f9 ......Intel(R) Gigabit CT Desktop Adapter
26...38 59 f9 6a 55 59 ......Microsoft Virtual WiFi Miniport Adapter
12...38 59 f9 6a 55 59 ......DW1501 Wireless-N WLAN Half-Mini Card
1...........................Software Loopback Interface 1
23...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #4
56...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #3
42...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface
===========================================================================
IPv4 Route Table
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 10.0.0.1 10.0.0.49 10
10.0.0.0 255.255.255.0 On-link 10.0.0.49 266
10.0.0.49 255.255.255.255 On-link 10.0.0.49 266
10.0.0.255 255.255.255.255 On-link 10.0.0.49 266
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
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 10.0.0.49 266
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 10.0.0.49 266
===========================================================================
Persistent Routes:
None
Después de conectarse a VPN (brevemente), se agrega el adaptador VPN:
Ethernet adapter Local Area Connection 2:
Connection-specific DNS Suffix . : INS.INSURITY.NET
Description . . . . . . . . . . . : Cisco AnyConnect Secure Mobility Client V
irtual Miniport Adapter for Windows x64
Physical Address. . . . . . . . . : 00-05-9A-3C-7A-00
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::256f:91f:8caf:be2c%25(Preferred)
Link-local IPv6 Address . . . . . : fe80::2c78:328e:3048:7269%25(Preferred)
IPv4 Address. . . . . . . . . . . : 172.23.240.224(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.252.0
Default Gateway . . . . . . . . . : ::
172.23.240.1
DNS Servers . . . . . . . . . . . : 172.25.159.139
172.25.159.221
Primary WINS Server . . . . . . . : 172.25.159.220
Secondary WINS Server . . . . . . : 172.25.159.221
NetBIOS over Tcpip. . . . . . . . : Enabled
y las rutas se ven así:
===========================================================================
Interface List
25...00 05 9a 3c 7a 00 ......Cisco AnyConnect Secure Mobility Client Virtual Mi
niport Adapter for Windows x64
55...68 05 ca 24 f6 f9 ......Intel(R) Gigabit CT Desktop Adapter
26...38 59 f9 6a 55 59 ......Microsoft Virtual WiFi Miniport Adapter
12...38 59 f9 6a 55 59 ......DW1501 Wireless-N WLAN Half-Mini Card
1...........................Software Loopback Interface 1
23...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #4
41...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2
56...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #3
42...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface
===========================================================================
IPv4 Route Table
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 10.0.0.1 10.0.0.49 10
0.0.0.0 0.0.0.0 172.23.240.1 172.23.240.224 2
4.30.219.65 255.255.255.255 10.0.0.1 10.0.0.49 11
10.0.0.1 255.255.255.255 On-link 10.0.0.49 11
10.0.0.49 255.255.255.255 On-link 10.0.0.49 266
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
172.23.240.0 255.255.252.0 On-link 172.23.240.224 257
172.23.240.224 255.255.255.255 On-link 172.23.240.224 257
172.23.243.255 255.255.255.255 On-link 172.23.240.224 257
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 10.0.0.49 266
224.0.0.0 240.0.0.0 On-link 172.23.240.224 257
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 10.0.0.49 266
255.255.255.255 255.255.255.255 On-link 172.23.240.224 257
===========================================================================
Persistent Routes:
Network Address Netmask Gateway Address Metric
0.0.0.0 0.0.0.0 172.23.240.1 1
===========================================================================
y las rutas se ven así:
IPv4 Route Table
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
10.0.0.0 255.255.255.0 On-link 10.0.0.49 266
10.0.0.49 255.255.255.255 On-link 10.0.0.49 266
10.0.0.255 255.255.255.255 On-link 10.0.0.49 266
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
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 10.0.0.49 266
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 10.0.0.49 266
===========================================================================
Persistent Routes:
None
En este punto ya perdí la puerta de enlace predeterminada y la conexión a Internet. Nuevamente, si me conecto usando un adaptador inalámbrico, la puerta de enlace predeterminada no se pierde después de desconectarme de la VPN. Aquí están las configuraciones para el adaptador inalámbrico:
Wireless LAN adapter Wireless Network Connection:
Connection-specific DNS Suffix . : hsd1.ct.comcast.net
Description . . . . . . . . . . . : DW1501 Wireless-N WLAN Half-Mini Card
Physical Address. . . . . . . . . : 38-59-F9-6A-55-59
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::5932:84c:e3f5:5eae%12(Preferred)
IPv4 Address. . . . . . . . . . . : 10.0.0.94(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Saturday, July 19, 2014 9:59:29 PM
Lease Expires . . . . . . . . . . : Sunday, July 27, 2014 12:09:21 AM
Default Gateway . . . . . . . . . : 10.0.0.1
DHCP Server . . . . . . . . . . . : 10.0.0.1
DHCPv6 IAID . . . . . . . . . . . : 221796857
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-15-C5-00-D6-18-03-73-AE-4A-21
DNS Servers . . . . . . . . . . . : 75.75.75.75
75.75.76.76
NetBIOS over Tcpip. . . . . . . . : Enabled
¿Alguna idea sobre qué configuración está causando esto?