IPv6 works temporarily, but drops off randomly

demize95 · April 23, 2011, 02:05:02 PM

I'm on Windows Server 2008 R2 (using it like Windows 7 though). We recently switched from one DSL provider to another, and my tunnel hasn't been working properly since. I've got my laptop in a DMZ, and the tunnel works for a while, but it stops working randomly.

Quote from: ipconfigC:\Users\Administrator>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : demize-windows
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : Home

Wireless LAN adapter Wireless Network Connection:

Connection-specific DNS Suffix . : Home
Description . . . . . . . . . . . : Atheros AR5B93 Wireless Network Adapter
Physical Address. . . . . . . . . : 70-1A-04-4F-11-03
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::7901:f8de:2e21:3e37%11(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.109(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Saturday, April 23, 2011 2:51:16 PM
Lease Expires . . . . . . . . . . : Sunday, April 24, 2011 2:51:20 PM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 326113796
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-DE-A3-24-00-26-22-87-8C-64

DNS Servers . . . . . . . . . . . : 2001:470:20::2
74.82.42.42
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Local Area Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom NetLink (TM) Gigabit Ethernet
Physical Address. . . . . . . . . : 00-26-22-87-8C-64
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Ethernet adapter VMware Network Adapter VMnet1:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : VMware Virtual Ethernet Adapter for VMnet
1
Physical Address. . . . . . . . . : 00-50-56-C0-00-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::bdf4:be68:a01a:ff5d%14(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.116.1(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 536891478
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-DE-A3-24-00-26-22-87-8C-64

DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter VMware Network Adapter VMnet8:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : VMware Virtual Ethernet Adapter for VMnet
8
Physical Address. . . . . . . . . : 00-50-56-C0-00-08
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::2d07:8650:b610:591f%16(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.190.1(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 570445910
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-DE-A3-24-00-26-22-87-8C-64

DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.{FBEB633F-4264-407F-99E8-10FE0A618385}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter IP6Tunnel:

Connection-specific DNS Suffix . : Home
Description . . . . . . . . . . . : Microsoft Direct Point-to-point Adapater
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:470:b11d:cafe:bad:c0f:fee:0(Preferre
d)
Link-local IPv6 Address . . . . . : fe80::69d5:85ed:cedc:658f%20(Preferred)
Default Gateway . . . . . . . . . : 2001:470:1c:312::1
DNS Servers . . . . . . . . . . . : 2001:470:20::2
74.82.42.42
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter isatap.Home:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : Home
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{F7CCF407-1A12-4A64-84A2-14C4D46BDAB8}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #3
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Applicable connections are the WLAN and IP6Tunnel. IPv6 works for a random amount of time, and then it completely stops working. My IPv4 address doesn't change [unless we restart our modem]. I can't use anything over IPv6, not http, IRC or even ping. Anybody have any ideas?

cholzhauer · April 23, 2011, 03:56:59 PM

how are you assigning addresses? there isnt a public address on your wireless adapter, so if you had assigned one, its now gone, and that could be the reason stuff stops working

demize95 · April 25, 2011, 03:14:07 PM

IPv4 address is reserved with DHCP reservation, I was in a DMZ (but now I'm not, since our router forwards Protocol 41 ^^). Our router didn't appear to be in a DMZ, it is now so that might change things. I just got myself set back up with the tunnel, so we'll see how things go :p

cholzhauer · April 25, 2011, 03:22:33 PM

Sorry, I should have clarified...I meant how were you assigning IPv6 addresses

demize95 · April 25, 2011, 03:46:29 PM

I'm assigning the address with a netsh ipv6 tunnel, pretty much just copying the example configuration and changing the needed values.

cholzhauer · April 25, 2011, 07:41:56 PM

I think one of the commands went awry somewhere

Quote
Tunnel adapter IP6Tunnel:

Connection-specific DNS Suffix . : Home
Description . . . . . . . . . . . : Microsoft Direct Point-to-point Adapater
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:470:b11d:cafe:bad:c0f:fee:0(Preferre
d)
Link-local IPv6 Address . . . . . : fe80::69d5:85ed:cedc:658f%20(Preferred)
Default Gateway . . . . . . . . . : 2001:470:1c:312::1
DNS Servers . . . . . . . . . . . : 2001:470:20::2
74.82.42.42
NetBIOS over Tcpip. . . . . . . . : Disabled

Ok, let's remove the entire tunnel. The 2001 address you have on your tunnel shouldn't be there. Assuming that's an address out of your routed /64, that needs to be assigned to your LAN connection. The address assigned to your IP6Tunnel adapter should end in a ::2.

If you paste the commands from the website I can help further

I don't have the commands offhand to remove the tunnel adapter, but I know they're in the forum somewhere

demize95 · April 25, 2011, 08:00:08 PM

Code Select


netsh interface teredo set state disabled
netsh interface ipv6 add v6v4tunnel IP6Tunnel 174.138.207.231 216.66.38.58
netsh interface ipv6 add address IP6Tunnel 2001:470:1c:312::2
netsh interface ipv6 add route ::/0 IP6Tunnel 2001:470:1c:312::1

That's what it says on the site. I modified it to look like this:

Code Select


netsh interface teredo set state disabled
netsh interface ipv6 add v6v4tunnel IP6Tunnel 192.168.1.109 216.66.38.58
netsh interface ipv6 add address IP6Tunnel 2001:470:b11d:cafe:bad:c0f:fee:0
netsh interface ipv6 add route ::/0 IP6Tunnel 2001:470:b11d:cafe:bad:c0f:fee:1

(2001:470:b11d is my routed /48)

It worked perfectly for me when we were on our old ISP, it was when we switched to our new ISP that it started to stop working randomly. It has been working perfectly since my last post though, so it's possible something I did to our router/modem settings fixed it.

cholzhauer · April 26, 2011, 04:57:41 AM

I'm surprised it ever worked.

Clear out what you have and try this

Code Select


netsh interface teredo set state disabled
netsh interface ipv6 add v6v4tunnel IP6Tunnel 192.168.1.109 216.66.38.58
netsh interface ipv6 add address IP6Tunnel 2001:470:1c:312::2
netsh interface ipv6 add route ::/0 IP6Tunnel 2001:470:1c:312::1

This assumes your NAT IP address is still 192.168.1.109.

News:

IPv6 works temporarily, but drops off randomly