Internet Connectivity Limited on Comcast

[Pennvic]

Been have issue connecting to websites while connected to Comcast Wifi. When connected to my T-Mobile Hotspot I have no issues.

Comcast Cable internet via Wifi
Arris TG862 Modem/Router Combo
Windows Firewall
No security

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : -PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : hsd1.va.comcast.net.

Wireless LAN adapter Wireless Network Connection 3:

Connection-specific DNS Suffix . : hsd1.va.comcast.net.
Description . . . . . . . . . . . : TP-LINK 300Mbps Wireless N Adapter
Physical Address. . . . . . . . . : C0-4A-00-39-7D-66
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2601:a:4f00:1ea:f09d:b16:13d3:1ea6(Prefer
red)
Temporary IPv6 Address. . . . . . : 2601:a:4f00:1ea:b19f:1896:1ba9:3682(Prefe
rred)
Link-local IPv6 Address . . . . . : fe80::f09d:b16:13d3:1ea6%17(Preferred)
IPv4 Address. . . . . . . . . . . : 10.0.0.2(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Thursday, April 17, 2014 6:23:03 PM
Lease Expires . . . . . . . . . . : Thursday, April 24, 2014 6:23:03 PM
Default Gateway . . . . . . . . . : fe80::2273:55ff:fe8d:3db1%17
10.0.0.1
DHCP Server . . . . . . . . . . . : 10.0.0.1
DHCPv6 IAID . . . . . . . . . . . : 281037312
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-17-AC-27-3D-C8-60-00-CC-9F-E0

DNS Servers . . . . . . . . . . . : 2001:558:feed::1
2001:558:feed::2
75.75.75.75
75.75.76.76
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Local Area Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
Physical Address. . . . . . . . . : C8-60-00-CC-9F-E0
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{8286B37F-2A2E-4C1C-99CB-473C0ADDA9C2}:

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 isatap.{4C23763E-7F0E-4680-B28B-20764BE5F556}:

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

Tunnel adapter Teredo Tunneling Pseudo-Interface:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:0:9d38:6abd:149a:14db:f5ff:fffd(Pref
erred)
Link-local IPv6 Address . . . . . : fe80::149a:14db:f5ff:fffd%13(Preferred)
Default Gateway . . . . . . . . . :
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter isatap.hsd1.va.comcast.net.:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : hsd1.va.comcast.net.
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #3
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

When using Xirrus I am packets are lost trying to ping the DNS server. No other issues.

My other devices can access webpages with the Comcast Wifi. Additionally, my PC experiences no connectivity issues when connected to my T-Mobile Hotspot through Wifi.

Lastly, the event viewer shows the following error:

Log Name: Microsoft-Windows-Dhcp-Client/Admin
Source: Microsoft-Windows-Dhcp-Client
Date: 4/17/2014 5:04:58 PM
Event ID: 1002
Task Category: Address Configuration State Event
Level: Error
Keywords:
User: LOCAL SERVICE
Computer: -PC
Description:
The IP address lease 10.0.0.2 for the Network Card with network address 0xC04A00397D66 has been denied by the DHCP server 68.86.33.227 (The DHCP Server sent a DHCPNACK message).
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Dhcp-Client" Guid="{15A7A4F8-0072-4EAB-ABAD-F98A4D666AED}" />
<EventID>1002</EventID>
<Version>0</Version>
<Level>2</Level>
<Task>3</Task>
<Opcode>76</Opcode>
<Keywords>0x4000000000000000</Keywords>
<TimeCreated SystemTime="2014-04-17T21:04:58.175196800Z" />
<EventRecordID>12682</EventRecordID>
<Correlation />
<Execution ProcessID="524" ThreadID="8036" />
<Channel>Microsoft-Windows-Dhcp-Client/Admin</Channel>
<Computer>Fisher-PC</Computer>
<Security UserID="S-1-5-19" />
</System>
<EventData>
<Data Name="Address1">33554442</Data>
<Data Name="HWLength">6</Data>
<Data Name="HWAddress">C04A00397D66</Data>
<Data Name="Address2">3810612804</Data>
</EventData>
</Event>

 

[chev65]

This is a common handshake problem between certain types of network interface devices and Comcast's second rate hardware.

This issue has come up many many times with the only resolution being to dump the Comcast modem/router and purchase a dedicated modem and a third party router.

This is why your particular machine only seems to be reliable when it's connected to other sources.

 

[Pennvic]

Thanks for the reply.

Since all my other devices work well on the Comcast Wifi would it make sense to buy a new Wifi adapter for my desktop. If so, if you have any recommendations I would appreciate it.

If not, recommendations for modems and routers that would work with the Comcast network would be appreciated.

Thanks.

 

[mattbob]

Pennvic - I'm having the same indications. Were you able to resolve this? How? Thanks!

 

[Pennvic]

I wound up purchasing a new router. I had the same issues with that though.

Ultimately, I was able to get a somewhat better connection by turning off IPv6 in Windows internet settings. That improved my connection to a useable state. Still not getting great speeds all the time but a lot better than before.

Hope this helps.